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Beginner's critiques of Rust

Hey all. I've been a Java/C#/Python dev for a number of years. I noticed Rust topping the StackOverflow most loved language list earlier this year, and I've been hearing good things about Rust's memory model and "free" concurrency for awhile. When it recently came time to rewrite one of my projects as a small webservice, it seemed like the perfect time to learn Rust.
I've been at this for about a month and so far I'm not understanding the love at all. I haven't spent this much time fighting a language in awhile. I'll keep the frustration to myself, but I do have a number of critiques I wouldn't mind discussing. Perhaps my perspective as a beginner will be helpful to someone. Hopefully someone else has faced some of the same issues and can explain why the language is still worthwhile.
Fwiw - I'm going to make a lot of comparisons to the languages I'm comfortable with. I'm not attempting to make a value comparison of the languages themselves, but simply comparing workflows I like with workflows I find frustrating or counterintuitive.
Docs
When I have a question about a language feature in C# or Python, I go look at the official language documentation. Python in particular does a really nice job of breaking down what a class is designed to do and how to do it. Rust's standard docs are little more than Javadocs with extremely minimal examples. There are more examples in the Rust Book, but these too are super simplified. Anything more significant requires research on third-party sites like StackOverflow, and Rust is too new to have a lot of content there yet.
It took me a week and a half of fighting the borrow checker to realize that HashMap.get_mut() was not the correct way to get and modify a map entry whose value was a non-primitive object. Nothing in the official docs suggested this, and I was actually on the verge of quitting the language over this until someone linked Tour of Rust, which did have a useful map example, in a Reddit comment. (If any other poor soul stumbles across this - you need HashMap.entry().or_insert(), and you modify the resulting entry in place using *my_entry.value = whatever. The borrow checker doesn't allow getting the entry, modifying it, and putting it back in the map.)
Pit of Success/Failure
C# has the concept of a pit of success: the most natural thing to do should be the correct thing to do. It should be easy to succeed and hard to fail.
Rust takes the opposite approach: every natural thing to do is a landmine. Option.unwrap() can and will terminate my program. String.len() sets me up for a crash when I try to do character processing because what I actually want is String.chars.count(). HashMap.get_mut() is only viable if I know ahead of time that the entry I want is already in the map, because HashMap.get_mut().unwrap_or() is a snake pit and simply calling get_mut() is apparently enough for the borrow checker to think the map is mutated, so reinserting the map entry afterward causes a borrow error. If-else statements aren't idiomatic. Neither is return.
Language philosophy
Python has the saying "we're all adults here." Nothing is truly private and devs are expected to be competent enough to know what they should and shouldn't modify. It's possible to monkey patch (overwrite) pretty much anything, including standard functions. The sky's the limit.
C# has visibility modifiers and the concept of sealing classes to prevent further extension or modification. You can get away with a lot of stuff using inheritance or even extension methods to tack on functionality to existing classes, but if the original dev wanted something to be private, it's (almost) guaranteed to be. (Reflection is still a thing, it's just understood to be dangerous territory a la Python's monkey patching.) This is pretty much "we're all professionals here"; I'm trusted to do my job but I'm not trusted with the keys to the nukes.
Rust doesn't let me so much as reference a variable twice in the same method. This is the functional equivalent of being put in a straitjacket because I can't be trusted to not hurt myself. It also means I can't do anything.
The borrow checker
This thing is legendary. I don't understand how it's smart enough to theoretically track data usage across threads, yet dumb enough to complain about variables which are only modified inside a single method. Worse still, it likes to complain about variables which aren't even modified.
Here's a fun example. I do the same assignment twice (in a real-world context, there are operations that don't matter in between.) This is apparently illegal unless Rust can move the value on the right-hand side of the assignment, even though the second assignment is technically a no-op.
//let Demo be any struct that doesn't implement Copy. let mut demo_object: Option = None; let demo_object_2: Demo = Demo::new(1, 2, 3); demo_object = Some(demo_object_2); demo_object = Some(demo_object_2); 
Querying an Option's inner value via .unwrap and querying it again via .is_none is also illegal, because .unwrap seems to move the value even if no mutations take place and the variable is immutable:
let demo_collection: Vec = Vec::::new(); let demo_object: Option = None; for collection_item in demo_collection { if demo_object.is_none() { } if collection_item.value1 > demo_object.unwrap().value1 { } } 
And of course, the HashMap example I mentioned earlier, in which calling get_mut apparently counts as mutating the map, regardless of whether the map contains the key being queried or not:
let mut demo_collection: HashMap = HashMap::::new(); demo_collection.insert(1, Demo::new(1, 2, 3)); let mut demo_entry = demo_collection.get_mut(&57); let mut demo_value: &mut Demo; //we can't call .get_mut.unwrap_or, because we can't construct the default //value in-place. We'd have to return a reference to the newly constructed //default value, which would become invalid immediately. Instead we get to //do things the long way. let mut default_value: Demo = Demo::new(2, 4, 6); if demo_entry.is_some() { demo_value = demo_entry.unwrap(); } else { demo_value = &mut default_value; } demo_collection.insert(1, *demo_value); 
None of this code is especially remarkable or dangerous, but the borrow checker seems absolutely determined to save me from myself. In a lot of cases, I end up writing code which is a lot more verbose than the equivalent Python or C# just trying to work around the borrow checker.
This is rather tongue-in-cheek, because I understand the borrow checker is integral to what makes Rust tick, but I think I'd enjoy this language a lot more without it.
Exceptions
I can't emphasize this one enough, because it's terrifying. The language flat up encourages terminating the program in the event of some unexpected error happening, forcing me to predict every possible execution path ahead of time. There is no forgiveness in the form of try-catch. The best I get is Option or Result, and nobody is required to use them. This puts me at the mercy of every single crate developer for every single crate I'm forced to use. If even one of them decides a specific input should cause a panic, I have to sit and watch my program crash.
Something like this came up in a Python program I was working on a few days ago - a web-facing third-party library didn't handle a web-related exception and it bubbled up to my program. I just added another except clause to the try-except I already had wrapped around that library call and that took care of the issue. In Rust, I'd have to find a whole new crate because I have no ability to stop this one from crashing everything around it.
Pushing stuff outside the standard library
Rust deliberately maintains a small standard library. The devs are concerned about the commitment of adding things that "must remain as-is until the end of time."
This basically forces me into a world where I have to get 50 billion crates with different design philosophies and different ways of doing things to play nicely with each other. It forces me into a world where any one of those crates can and will be abandoned at a moment's notice; I'll probably have to find replacements for everything every few years. And it puts me at the mercy of whoever developed those crates, who has the language's blessing to terminate my program if they feel like it.
Making more stuff standard would guarantee a consistent design philosophy, provide stronger assurance that things won't panic every three lines, and mean that yes, I can use that language feature as long as the language itself is around (assuming said feature doesn't get deprecated, but even then I'd have enough notice to find something else.)
Testing is painful
Tests are definitively second class citizens in Rust. Unit tests are expected to sit in the same file as the production code they're testing. What?
There's no way to tag tests to run groups of tests later; tests can be run singly, using a wildcard match on the test function name, or can be ignored entirely using [ignore]. That's it.
Language style
This one's subjective. I expect to take some flak for this and that's okay.
submitted by crab1122334 to rust [link] [comments]

./play.it 2.12: API, GUI and video games

./play.it 2.12: API, GUI and video games

./play.it is a free/libre software that builds native packages for several Linux distributions from DRM-free installers for a collection of commercial games. These packages can then be installed using the standard distribution-provided tools (APT, pacman, emerge, etc.).
A more complete description of ./play.it has already been posted in linux_gaming a couple months ago: ./play.it, an easy way to install commercial games on GNU/Linux
It's already been one year since version 2.11 was released, in January 2019. We will only briefly review the changelog of version 2.12 and focus on the different points of ./play.it that kept us busy during all this time, and of which coding was only a small part.

What’s new with 2.12?

Though not the focus of this article, it would be a pity not to present all the added features of this brand new version. ;)
Compared to the usual updates, 2.12 is a major one, especially since for two years, we slowed down the addition of new features. Some patches took dust since the end of 2018 before finally be integrated in this update!
The list of changes for this 2.12 release can be found on our forge. Here is a full copy for convenience:

Development migration

History

As many free/libre projects, ./play.it development started on some random sector of a creaking hard drive, and unsurprisingly, a whole part of its history (everything predating version 1.13.15 released on Mars 30th, 2016) disappeared into the limbs because some unwise operation destroyed the only copy of the repository… Lesson learned, what's not shared don't stay long, and so was born the first public Git repository of the project. The easing of collaborative work was only accidentally achieved by this quest for eternity, but wasn't the original motivation for making the repository publicly available.
Following this decision, ./play.it source code has been hosted successively by many shared forge platforms:

Dedicated forge

As development progressed, ./play.it began to increase its need for resources, dividing its code into several repositories to improve the workflow of the different aspects of the projects, adding continuous integration tests and their constraints, etc. A furious desire to understand the nooks and crannies behind a forge platform was the last deciding factor towards hosting a dedicated forge.
So it happened, we deployed a forge platform on a dedicated server, hugely benefiting from the tremendous work achieved by the GitLab's package Debian Maintainers team. In return, we tried to contribute our findings in improving this software packaging.
That was not expected, but this migration happened just a little time before the announcement “Déframasoftisons Internet !” (French article) about the planned end of Framagit.
This dedicated instance used to be hosted on a VPS rented from Digital Ocean until the second half of July 2020, and since then has been moved to another VPS, rented from Hetzner. The specifications are similar, as well as the service, but thanks to this migration our hosting costs have been cut in half. Keeping in mind that this is paid by a single person, so any little donation helps a lot on this front. ;)
To the surprise of our system administrator, this last migration took only a couple hours with no service interruption reported by our users.

Forge access

This new forge can be found at forge.dotslashplay.it. Registrations are open to the public, but we ask you to not abuse this, the main restriction being that we do not wish to host projects unrelated to ./play.it. Of course exceptions are made for our active contributors, who are allowed to host some personal projects there.
So, if you wish to use this forge to host your own work, you first need to make some significant contributions to ./play.it.

API

The collection of supported games growing endlessly, we have started the development of a public API allowing access to lots of information related to ./play.it.
This API, which is not yet stabilized, is simply an interface to a versioned database containing all the ./play.it scripts, handled archives, games installable through the project. Relations are, of course, handled between those items, enabling its use for requests like : « What packages are required on my system to install Cæsar Ⅲ ? » or « What are the free (as in beer) games handled via DOSBox ? ».
Originally developed as support for the new, in-development, Web site (we'll talk about it later on), this API should facilitate the development of tools around ./play.it. For example, it'll be useful for whomever would like to build a complete video game handling software (downloading, installation, starting, etc.) using ./play.it as one of its building bricks.
For those curious about the technical side, it's an API based on Lumeneffectuant that makes requests on a MariaDB database, all self-hosted on a Debian Sid. Not only is the code of the API versioned on our forge, but also the structure and content of the databases, which will allow those who desired it to install a local version easily.

New website

Based on the aforementioned API, a new website is under development and will replace our current website based on DokuWiki.
Indeed, if the lack of database and the plain text files structure of DokuWiki seemed at first attractive, as ./play.it supported only a handful of games (link in French), this feature became more inconvenient as the library of ./play.it supported games grew.
We shall make an in-depth presentation of this website for the 2.13 release of ./play.it, but a public demo of the development version from our forge is already available.
If you feel like providing an helping hand on this task, some priority tasks have been identified to allow opening a new Web site able to replace the current one. And for those interested in technical details, this web Site was developed in PHP using the framework Laravel. The current in-development version is hosted for now on the same Debian Sid than the API.

GUI

A regular comment that is done about the project is that, if the purpose is to make installing games accessible to everyone without technical skills, having to run scripts in the terminal remains somewhat intimidating. Our answer until now has been that while the project itself doesn't aim to providing a graphical interface (KISS principle "Keep it simple, stupid"), still and always), but that it would be relatively easy to, later on, develop a graphical front-end to it.
Well, it happens that is now reality. Around the time of our latest publication, one of our contributors, using the API we just talked about, developed a small prototype that is usable enough to warrant a little shout out. :-)
In practice, it is some small Python 3 code (an HCI completely in POSIX shell is for a later date :-°), using GTK 3 (and still a VTE terminal to display the commands issued, but the user shouldn't have to input anything in it, except perhaps the root password to install some packages). This allowed to verify that, as we used to say, it would be relatively easy, since a script of less than 500 lines of code (written quickly over a week-end) was enough to do the job !
Of course, this graphical interface project stays independent from the main project, and is maintained in a specific repository. It seems interesting to us to promote it in order to ease the use of ./play.it, but this doesn't prevent any other similar projects to be born, for example using a different language or graphical toolkit (we, globally, don't have any particular affinity towards Python or GTK).
The use of this HCI needs three steps : first, a list of available games is displayed, coming directly from our API. You just need to select in the list (optionally using the search bar) the game you want to install. Then it switches to a second display, which list the required files. If several alternatives are available, the user can select the one he wants to use. All those files must be in the same directory, the address bar on the top enabling to select which one to use (click on the open button on the top opens a filesystem navigation window). Once all those files available (if they can be downloaded, the software will do it automatically), you can move ahead to the third step, which is just watching ./play.it do its job :-) Once done, a simple click on the button on the bottom will run the game (even if, from this step, the game is fully integrated on your system as usual, you no longer need this tool to run it).
To download potentially missing files, the HCI will use, depending on what's available on the system, either wget, curl or aria2c (this last one also handling torrents), of which the output will be displayed in the terminal of the third phase, just before running the scripts. For privilege escalation to install packages, sudo will be used preferentially if available (with the option to use a third-party application for password input, if the corresponding environment variable is set, which is more user-friendly), else su will be used.
Of course, any suggestion for an improvement will be received with pleasure.

New games

Of course, such an announcement would not be complete without a list of the games that got added to our collection since the 2.11 release… So here you go:
If your favourite game is not supported by ./play.it yet, you should ask for it in the dedicated tracker on our forge. The only requirement to be a valid request is that there exists a version of the game that is not burdened by DRM.

What’s next?

Our team being inexhaustible, work on the future 2.13 version has already begun…
A few major objectives of this next version are :
If your desired features aren't on this list, don't hesitate to signal it us, in the comments of this news release. ;)

Links

submitted by vv224 to linux_gaming [link] [comments]

Forex Signals Reddit: top providers review (part 1)

Forex Signals Reddit: top providers review (part 1)

Forex Signals - TOP Best Services. Checked!

To invest in the financial markets, we must acquire good tools that help us carry out our operations in the best possible way. In this sense, we always talk about the importance of brokers, however, signal systems must also be taken into account.
The platforms that offer signals to invest in forex provide us with alerts that will help us in a significant way to be able to carry out successful operations.
For this reason, we are going to tell you about the importance of these alerts in relation to the trading we carry out, because, without a doubt, this type of system will provide us with very good information to invest at the right time and in the best assets in the different markets. financial
Within this context, we will focus on Forex signals, since it is the most important market in the world, since in it, multiple transactions are carried out on a daily basis, hence the importance of having an alert system that offers us all the necessary data to invest in currencies.
Also, as we all already know, cryptocurrencies have become a very popular alternative to investing in traditional currencies. Therefore, some trading services/tools have emerged that help us to carry out successful operations in this particular market.
In the following points, we will detail everything you need to know to start operating in the financial markets using trading signals: what are signals, how do they work, because they are a very powerful help, etc. Let's go there!

What are Forex Trading Signals?

https://preview.redd.it/vjdnt1qrpny51.jpg?width=640&format=pjpg&auto=webp&s=bc541fc996701e5b4dd940abed610b59456a5625
Before explaining the importance of Forex signals, let's start by making a small note so that we know what exactly these alerts are.
Thus, we will know that the signals on the currency market are received by traders to know all the information that concerns Forex, both for assets and for the market itself.
These alerts allow us to know the movements that occur in the Forex market and the changes that occur in the different currency pairs. But the great advantage that this type of system gives us is that they provide us with the necessary information, to know when is the right time to carry out our investments.
In other words, through these signals, we will know the opportunities that are presented in the market and we will be able to carry out operations that can become quite profitable.
Profitability is precisely another of the fundamental aspects that must be taken into account when we talk about Forex signals since the vast majority of these alerts offer fairly reliable data on assets. Similarly, these signals can also provide us with recommendations or advice to make our operations more successful.

»Purpose: predict movements to carry out Profitable Operations

In short, Forex signal systems aim to predict the behavior that the different assets that are in the market will present and this is achieved thanks to new technologies, the creation of specialized software, and of course, the work of financial experts.
In addition, it must also be borne in mind that the reliability of these alerts largely lies in the fact that they are prepared by financial professionals. So they turn out to be a perfect tool so that our investments can bring us a greater number of benefits.

The best signal services today

We are going to tell you about the 3 main alert system services that we currently have on the market. There are many more, but I can assure these are not scams and are reliable. Of course, not 100% of trades will be a winner, so please make sure you apply proper money management and risk management system.

1. 1000pipbuilder (top choice)

Fast track your success and follow the high-performance Forex signals from 1000pip Builder. These Forex signals are rated 5 stars on Investing.com, so you can follow every signal with confidence. All signals are sent by a professional trader with over 10 years investment experience. This is a unique opportunity to see with your own eyes how a professional Forex trader trades the markets.
The 1000pip Builder Membership is ordinarily a signal service for Forex trading. You will get all the facts you need to successfully comply with the trading signals, set your stop loss and take earnings as well as additional techniques and techniques!
You will get easy to use trading indicators for Forex Trades, including your entry, stop loss and take profit. Overall, the earnings target per months is 350 Pips, depending on your funding this can be a high profit per month! (In fact, there is by no means a guarantee, but the past months had been all between 600 – 1000 Pips).
>>>Know more about 1000pipbuilder
Your 1000pip builder membership gives you all in hand you want to start trading Forex with success. Read the directions and wait for the first signals. You can trade them inside your demo account first, so you can take a look at the performance before you make investments real money!
Features:
  • Free Trial
  • Forex signals sent by email and SMS
  • Entry price, take profit and stop loss provided
  • Suitable for all time zones (signals sent over 24 hours)
  • MyFXBook verified performance
  • 10 years of investment experience
  • Target 300-400 pips per month
Pricing:
https://preview.redd.it/zjc10xx6ony51.png?width=668&format=png&auto=webp&s=9b0eac95f8b584dc0cdb62503e851d7036c0232b
VISIT 1000ipbuilder here

2. DDMarkets

Digital Derivatives Markets (DDMarkets) have been providing trade alert offerings since May 2014 - fully documenting their change ideas in an open and transparent manner.
September 2020 performance report for DD Markets.
Their manner is simple: carry out extensive research, share their evaluation and then deliver a trading sign when triggered. Once issued, daily updates on the trade are despatched to members via email.
It's essential to note that DDMarkets do not tolerate floating in an open drawdown in an effort to earnings at any cost - a common method used by less professional providers to 'fudge' performance statistics.
Verified Statistics: Not independently verified.
Price: plans from $74.40 per month.
Year Founded: 2014
Suitable for Beginners: Yes, (includes handy to follow trade analysis)
VISIT
-------

3. JKonFX

If you are looking or a forex signal service with a reliable (and profitable) music record you can't go previous Joel Kruger and the team at JKonFX.
Trading performance file for JKonFX.
Joel has delivered a reputable +59.18% journal performance for 2016, imparting real-time technical and fundamental insights, in an extremely obvious manner, to their 30,000+ subscriber base. Considered a low-frequency trader, alerts are only a small phase of the overall JKonFX subscription. If you're searching for hundreds of signals, you may want to consider other options.
Verified Statistics: Not independently verified.
Price: plans from $30 per month.
Year Founded: 2014
Suitable for Beginners: Yes, (includes convenient to follow videos updates).
VISIT

The importance of signals to invest in Forex

Once we have known what Forex signals are, we must comment on the importance of these alerts in relation to our operations.
As we have already told you in the previous paragraph, having a system of signals to be able to invest is quite advantageous, since, through these alerts, we will obtain quality information so that our operations end up being a true success.

»Use of signals for beginners and experts

In this sense, we have to say that one of the main advantages of Forex signals is that they can be used by both beginners and trading professionals.
As many as others can benefit from using a trading signal system because the more information and resources we have in our hands. The greater probability of success we will have. Let's see how beginners and experts can take advantage of alerts:
  • Beginners: for inexperienced these alerts become even more important since they will thus have an additional tool that will guide them to carry out all operations in the Forex market.
  • Professionals: In the same way, professionals are also recommended to make use of these alerts, so they have adequate information to continue bringing their investments to fruition.
Now that we know that both beginners and experts can use forex signals to invest, let's see what other advantages they have.

»Trading automation

When we dedicate ourselves to working in the financial world, none of us can spend 24 hours in front of the computer waiting to perform the perfect operation, it is impossible.
That is why Forex signals are important, because, in order to carry out our investments, all we will have to do is wait for those signals to arrive, be attentive to all the alerts we receive, and thus, operate at the right time according to the opportunities that have arisen.
It is fantastic to have a tool like this one that makes our work easier in this regard.

»Carry out profitable Forex operations

These signals are also important, because the vast majority of them are usually quite profitable, for this reason, we must get an alert system that provides us with accurate information so that our operations can bring us great benefits.
But in addition, these Forex signals have an added value and that is that they are very easy to understand, therefore, we will have a very useful tool at hand that will not be complicated and will end up being a very beneficial weapon for us.

»Decision support analysis

A system of currency market signals is also very important because it will help us to make our subsequent decisions.
We cannot forget that, to carry out any type of operation in this market, previously, we must meditate well and know the exact moment when we will know that our investments are going to bring us profits .
Therefore, all the information provided by these alerts will be a fantastic basis for future operations that we are going to carry out.

»Trading Signals made by professionals

Finally, we have to recall the idea that these signals are made by the best professionals. Financial experts who know perfectly how to analyze the movements that occur in the market and changes in prices.
Hence the importance of alerts, since they are very reliable and are presented as a necessary tool to operate in Forex and that our operations are as profitable as possible.

What should a signal provider be like?

https://preview.redd.it/j0ne51jypny51.png?width=640&format=png&auto=webp&s=5578ff4c42bd63d5b6950fc6401a5be94b97aa7f
As you have seen, Forex signal systems are really important for our operations to bring us many benefits. For this reason, at present, there are multiple platforms that offer us these financial services so that investing in currencies is very simple and fast.
Before telling you about the main services that we currently have available in the market, it is recommended that you know what are the main characteristics that a good signal provider should have, so that, at the time of your choice, you are clear that you have selected one of the best systems.

»Must send us information on the main currency pairs

In this sense, one of the first things we have to comment on is that a good signal provider, at a minimum, must send us alerts that offer us information about the 6 main currencies, in this case, we refer to the euro, dollar, The pound, the yen, the Swiss franc, and the Canadian dollar.
Of course, the data you provide us will be related to the pairs that make up all these currencies. Although we can also find systems that offer us information about other minorities, but as we have said, at a minimum, we must know these 6.

»Trading tools to operate better

Likewise, signal providers must also provide us with a large number of tools so that we can learn more about the Forex market.
We refer, for example, to technical analysis above all, which will help us to develop our own strategies to be able to operate in this market.
These analyzes are always prepared by professionals and study, mainly, the assets that we have available to invest.

»Different Forex signals reception channels

They must also make available to us different ways through which they will send us the Forex signals, the usual thing is that we can acquire them through the platform's website, or by a text message and even through our email.
In addition, it is recommended that the signal system we choose sends us a large number of alerts throughout the day, in order to have a wide range of possibilities.

»Free account and customer service

Other aspects that we must take into account to choose a good signal provider is whether we have the option of receiving, for a limited time, alerts for free or the profitability of the signals they emit to us.
Similarly, a final aspect that we must emphasize is that a good signal system must also have excellent customer service, which is available to us 24 hours a day and that we can contact them at through an email, a phone number, or a live chat, for greater immediacy.
Well, having said all this, in our last section we are going to tell you which are the best services currently on the market. That is, the most suitable Forex signal platforms to be able to work with them and carry out good operations. In this case, we will talk about ForexPro Signals, 365 Signals and Binary Signals.

Forex Signals Reddit: conclusion

To be able to invest properly in the Forex market, it is convenient that we get a signal system that provides us with all the necessary information about this market. It must be remembered that Forex is a very volatile market and therefore, many movements tend to occur quickly.
Asset prices can change in a matter of seconds, hence the importance of having a system that helps us analyze the market and thus know, what is the right time for us to start operating.
Therefore, although there are currently many signal systems that can offer us good services, the three that we have mentioned above are the ones that are best valued by users, which is why they are the best signal providers that we can choose to carry out. our investments.
Most of these alerts are quite profitable and in addition, these systems usually emit a large number of signals per day with full guarantees. For all this, SignalsForexPro, Signals365, or SignalsBinary are presented as fundamental tools so that we can obtain a greater number of benefits when we carry out our operations in the currency market.
submitted by kayakero to makemoneyforexreddit [link] [comments]

ResultsFileName = 0×0 empty char array Why? Where are my results?

Edit: Turns out I was missing a needed toolbox.
Hello,
I am not getting any errors and I do not understand why I am not getting any output. I am trying to batch process a large number of ecg signals. Below is my code and the two relevant functions. Any help greatly appreciated. I am very new.
d = importSections("Dx_sections.csv"); % set the number of recordings n = height(d); % settings HRVparams = InitializeHRVparams('test_physionet') for ii = 1:n % Import waveform (ECG) [record, signals] = read_edf(strcat(d.PID(ii), '/baseline.edf')); myecg = record.ECG; Ann = []; [HRVout, ResultsFileName] = Main_HRV_Analysis(myecg,'','ECGWaveform',HRVparams) end function [HRVout, ResultsFileName ] = Main_HRV_Analysis(InputSig,t,InputFormat,HRVparams,subID,ann,sqi,varargin) % ====== HRV Toolbox for PhysioNet Cardiovascular Signal Toolbox ========= % % Main_HRV_Analysis(InputSig,t,InputFormat,HRVparams,subID,ann,sqi,varargin) % OVERVIEW: % % INPUT: % InputSig - Vector containing RR intervals data (in seconds) % or ECG/PPG waveform % t - Time indices of the rr interval data (seconds) or % leave empty for ECG/PPG input % InputFormat - String that specifiy if the input vector is: % 'RRIntervals' for RR interval data % 'ECGWaveform' for ECG waveform % 'PPGWaveform' for PPG signal % HRVparams - struct of settings for hrv_toolbox analysis that can % be obtained using InitializeHRVparams.m function % HRVparams = InitializeHRVparams(); % % % OPTIONAL INPUTS: % subID - (optional) string to identify current subject % ann - (optional) annotations of the RR data at each point % indicating the type of the beat % sqi - (optional) Signal Quality Index; Requires a % matrix with at least two columns. Column 1 % should be timestamps of each sqi measure, and % Column 2 should be SQI on a scale from 0 to 1. % Use InputSig, Type pairs for additional signals such as ABP % or PPG signal. The input signal must be a vector containing % signal waveform and the Type: 'ABP' and\or 'PPG'. % % OUTPUS: % results - HRV time and frequency domain metrics as well % as AC and DC, SDANN and SDNNi % ResultsFileName - Name of the file containing the results % % NOTE: before running this script review and modifiy the parameters % in "initialize_HRVparams.m" file accordingly with the specific % of the new project (see the readme.txt file for further details) % EXAMPLES % - rr interval input % Main_HRV_Analysis(RR,t,'RRIntervals',HRVparams) % - ECG wavefrom input % Main_HRV_Analysis(ECGsig,t,'ECGWavefrom',HRVparams,'101') % - ECG waveform and also ABP and PPG waveforms % Main_HRV_Analysis(ECGsig,t,'ECGWaveform',HRVparams,[],[],[], abpSig, % 'ABP', ppgSig, 'PPG') % % DEPENDENCIES & LIBRARIES: % HRV Toolbox for PhysioNet Cardiovascular Signal Toolbox % https://github.com/cliffordlab/PhysioNet-Cardiovascular-Signal-Toolbox % % REFERENCE: % Vest et al. "An Open Source Benchmarked HRV Toolbox for Cardiovascular % Waveform and Interval Analysis" Physiological Measurement (In Press), 2018. % % REPO: % https://github.com/cliffordlab/PhysioNet-Cardiovascular-Signal-Toolbox % ORIGINAL SOURCE AND AUTHORS: % This script written by Giulia Da Poian % Dependent scripts written by various authors % (see functions for details) % COPYRIGHT (C) 2018 % LICENSE: % This software is offered freely and without warranty under % the GNU (v3 or later) public license. See license file for % more information %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% if nargin < 4 error('Wrong number of input arguments') end if nargin < 5 subID = '0000'; end if nargin < 6 ann = []; end if nargin < 7 sqi = []; end if length(varargin) == 1 || length(varargin) == 3 error('Incomplete Signal-Type pair') elseif length(varargin) == 2 extraSigType = varargin(2); extraSig = varargin{1}; elseif length(varargin) == 4 extraSigType = [varargin(2) varargin(4)]; extraSig = [varargin{1} varargin{3}]; end if isa(subID,'cell'); subID = string(subID); end % Control on signal length if (strcmp(InputFormat, 'ECGWaveform') && length(InputSig)/HRVparams.Fs< HRVparams.windowlength) ... || (strcmp(InputFormat, 'PPGWaveform') && length(InputSig)/HRVparams.Fs 300 s VLF = [0.0033 .04]; % Requires at least 300 s window LF = [.04 .15]; % Requires at least 25 s window HF = [0.15 0.4]; % Requires at least 7 s window HRVparams.freq.limits = [ULF; VLF; LF; HF]; HRVparams.freq.zero_mean = 1; % Default: 1, Option for subtracting the mean from the input data HRVparams.freq.method = 'lomb'; % Default: 'lomb' % Options: 'lomb', 'burg', 'fft', 'welch' HRVparams.freq.plot_on = 0; % The following settings are for debugging spectral analysis methods HRVparams.freq.debug_sine = 0; % Default: 0, Adds sine wave to tachogram for debugging HRVparams.freq.debug_freq = 0.15; % Default: 0.15 HRVparams.freq.debug_weight = .03; % Default: 0.03 % Lomb: HRVparams.freq.normalize_lomb = 0; % Default: 0 % 1 = Normalizes Lomb Periodogram, % 0 = Doesn't normalize % Burg: (not recommended) HRVparams.freq.burg_poles = 15; % Default: 15, Number of coefficients % for spectral estimation using the Burg % method (not recommended) % The following settings are only used when the user specifies spectral % estimation methods that use resampling : 'welch','fft', 'burg' HRVparams.freq.resampling_freq = 7; % Default: 7, Hz HRVparams.freq.resample_interp_method = 'cub'; % Default: 'cub' % 'cub' = cublic spline method % 'lin' = linear spline method HRVparams.freq.resampled_burg_poles = 100; % Default: 100 %% 11. SDANN and SDNNI Analysis Settings HRVparams.sd.on = 1; % Default: 1, SD analysis 1=On or 0=Off HRVparams.sd.segmentlength = 300; % Default: 300, windows length in seconds %% 12. PRSA Analysis Settings HRVparams.prsa.on = 1; % Default: 1, PRSA Analysis 1=On or 0=Off HRVparams.prsa.win_length = 30; % Default: 30, The length of the PRSA signal % before and after the anchor points % (the resulting PRSA has length 2*L) HRVparams.prsa.thresh_per = 20; % Default: 20%, Percent difference that one beat can % differ from the next in the prsa code HRVparams.prsa.plot_results = 0; % Default: 0 HRVparams.prsa.scale = 2; % Default: 2, scale parameter for wavelet analysis (to compute AC and DC) %% 13. Peak Detection Settings % The following settings are for jqrs.m HRVparams.PeakDetect.REF_PERIOD = 0.250; % Default: 0.25 (should be 0.15 for FECG), refractory period in sec between two R-peaks HRVparams.PeakDetect.THRES = .6; % Default: 0.6, Energy threshold of the detector HRVparams.PeakDetect.fid_vec = []; % Default: [], If some subsegments should not be used for finding the optimal % threshold of the P&T then input the indices of the corresponding points here HRVparams.PeakDetect.SIGN_FORCE = []; % Default: [], Force sign of peaks (positive value/negative value) HRVparams.PeakDetect.debug = 0; % Default: 0 HRVparams.PeakDetect.ecgType = 'MECG'; % Default : MECG, options (adult MECG) or featl ECG (fECG) HRVparams.PeakDetect.windows = 15; % Befautl: 15,(in seconds) size of the window onto which to perform QRS detection %% 14. Entropy Settings % Multiscale Entropy HRVparams.MSE.on = 1; % Default: 1, MSE Analysis 1=On or 0=Off HRVparams.MSE.windowlength = []; % Default: [], windows size in seconds, default perform MSE on the entire signal HRVparams.MSE.increment = []; % Default: [], window increment HRVparams.MSE.RadiusOfSimilarity = 0.15; % Default: 0.15, Radius of similarity (% of std) HRVparams.MSE.patternLength = 2; % Default: 2, pattern length HRVparams.MSE.maxCoarseGrainings = 20; % Default: 20, Maximum number of coarse-grainings % SampEn an ApEn HRVparams.Entropy.on = 1; % Default: 1, MSE Analysis 1=On or 0=Off HRVparams.Entropy.RadiusOfSimilarity = 0.15; % Default: 0.15, Radius of similarity (% of std) HRVparams.Entropy.patternLength = 2; % Default: 2, pattern length %% 15. DFA Settings HRVparams.DFA.on = 1; % Default: 1, DFA Analysis 1=On or 0=Off HRVparams.DFA.windowlength = []; % Default [], windows size in seconds, default perform DFA on the entair signal HRVparams.DFA.increment = []; % Default: [], window increment HRVparams.DFA.minBoxSize = 4 ; % Default: 4, Smallest box width HRVparams.DFA.maxBoxSize = []; % Largest box width (default in DFA code: signal length/4) HRVparams.DFA.midBoxSize = 16; % Medium time scale box width (default in DFA code: 16) %% 16. Poincaré plot HRVparams.poincare.on = 1; % Default: 1, Poincare Analysis 1=On or 0=Off %% 17. Heart Rate Turbulence (HRT) - Settings HRVparams.HRT.on = 1; % Default: 1, HRT Analysis 1=On or 0=Off HRVparams.HRT.BeatsBefore = 2; % Default: 2, # of beats before PVC HRVparams.HRT.BeatsAfter = 16; % Default: 16, # of beats after PVC and CP HRVparams.HRT.GraphOn = 0; % Default: 0, do not plot HRVparams.HRT.windowlength = 24; % Default 24h, windows size in hours HRVparams.HRT.increment = 24; % Default 24h, sliding window increment in hours HRVparams.HRT.filterMethod = 'mean5before'; % Default mean5before, HRT filtering option %% 18. Output Settings HRVparams.gen_figs = 0; % Generate figures HRVparams.save_figs = 0; % Save generated figures if HRVparams.save_figs == 1 HRVparams.gen_figs = 1; end % Format settings for HRV Outputs HRVparams.output.format = 'csv'; % 'csv' - creates csv file for output % 'mat' - creates .mat file for output HRVparams.output.separate = 0; % Default : 1 = separate files for each subject % 0 = all results in one file HRVparams.output.num_win = []; % Specify number of lowest hr windows returned % leave blank if all windows should be returned % Format settings for annotations generated HRVparams.output.ann_format = 'binary'; % 'binary' = binary annotation file generated % 'csv' = ASCII CSV file generated end 
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vfxAlert - Signals for binary options

vfxAlert - Signals for binary options
vfxAlert it's a tool for a binary options traders which they will use in their own trading strategies. Using vfxAlert assumes that the users are conversant in the essential principles of the forex market. and that they understand the principles of technical analysis and statistical methods. There are two main ways the way to use vfxAlert:
Create a trading strategy supported signals of vfxAlert. Using adaptive algorithm for confirmation signals of existing trading strategy. Especially For Beginners Most of you think that binary options it's easy, that's absolutely wrong. Please feel the difference between easy to trade and simply earn money. Binary options are easy to trade - that's true...
But successful trading requires discipline and strict compliance with the principles of the trading strategy.
It's are going to be very difficult to know what exactly vfxAlert propose and the way to use of these statistical data. Our recommendation is to use free signals within the free version and learn technical analysis and statistical principles.
Trade 2 hours per day less . Trade at an equivalent time a day . Trade long-term signals. (Min. 5 min expiration time) Learn about assets what you getting to trade. How price moves in several trading sessions. See how trend influence on signals profitable. See how heatmaps&power influence on signals profitable. Analyse your trading statistics. Trade on demo-account. After one month you'll feel the market and possible you'll be ready to create your first trading strategy.
Signals for binary options, Best binary options signals, Free Binary Options Signals, Binary Options Signals, binary signals, binary options signals software
!Important: Signals aren't a recommendation for action. Signals are the results of marketing research on a specific algorithm, a trader has got to understand how signals are formed, and what's current market tendencies to form the proper decision.

Signals for binary options
!Important: vfxAlert don't offer trading strategies. vfxAlert offer signals and real-time statistics counting on current indicators values. See below:
The trading strategy may be a system of rules, on the idea of which the trader makes his own decisions. Such a system is made only on the idea of individual trading experience, gleaned knowledge and purchased skills. The strategy allows a deep understanding of the structure of the market and therefore the mechanisms of its operation, therefore, the exchange player makes decisions supported the present situation. On the idea of a private strategy, a trader can develop several trading systems and use them counting on market conditions. The strategy always takes under consideration fundamental factors, statistical data, also because the basic postulates of risk and money management.
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VfxAlert signals and candlestick patterns

VfxAlert signals and candlestick patterns
All how to make on binary options strategies should take into account all market analysis options. You cannot make a decision on only one instrument, even if these are candlestick analysis patterns.
Let's start with trend signals, see examples of vfxAlert binary signals.
Currency pair GBP/USD and a strong signal on PUT-option signal. Let's look at the price chart - confirmation by the "Three Method" candlestick pattern and you can open an option with an expiration of 5-10 minutes.

https://preview.redd.it/gwn6hg5fs8p51.png?width=1100&format=png&auto=webp&s=f67cae8d8fde0e38a27318f8eadea0e2c3cad495
The signal appeared at the intersection of the moving average ("MA" on the signal panel). Traders see this. The option opens on a reversal, but then there are also candlestick patterns, and new PUT-signals with the “MA” label open the next options with a large volume.
The next signal on the CCI indicator shows the dynamics of the current trend. Created for the stock market, where trends are long and easier to find. On Forex, volatility is higher and there may be strong corrections and pullbacks that "break" the indicator. In the figure, binary options trading signals is confirmed by a strong candle pattern – the price goes towards the gap and you can open a CALL-option.
Reversal real binary options signals vfxAlert.
More reliable than trendy ones, beginners should start with them. It is easier to see and understand: "Bulling engulfing" pattern, which means the "bulls" managed to shift the balance of power to themselves and start an uptend on EUR / GBP. The vfxAlert signal confirms this by technical analysis of the RSI indicator.

https://preview.redd.it/gpikbe6js8p51.png?width=1100&format=png&auto=webp&s=8581ebe0a59f665b78891996f23d95c289972250
Doji candlestick appeared on EUUSD. In candlestick analysis, this is the strongest reversal pattern. The vfxAlert binary options signal according to Parabolic SAR trend confirms the beginning of the downtrend. After one candlestick, the trend started you can open the PUT-option.
The trader looks at «Power» value first, the market may be sideways, and candlestick patterns are false:

https://preview.redd.it/efwtnupms8p51.png?width=1100&format=png&auto=webp&s=1170e6526704d44ec1a0ee936de5797f41e61d31
We always start testing combination "vfxAlert live binary signals + candlestick patterns" on a demo account. You only receive recommendations and must make sure that they fit your strategy, trading session and trading style.
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Cryptosoft Review 2020-Is it a Scam?

Cryptosoft Review 2020-Is it a Scam?

Most f the reviews we tend to have come back across reveal that the Cryptp soft platform is easy to
Their client service is very efficient. We did a live check and confirmed that they respond at intervals a moment. Moreover, they are available 24/7.
The Cryptp soft app is secure. They need all the mandatory measures in place to make sure data privacy.
The Cryptp soft System is considered by several among the most effective robots within the market nowadays. We have a tendency to realize this robot to perform virtually the same with Bitcoin Rush, another top bitcoin robot. Read the review of Bitcoin Rush for more data?
Cryptp soft registration method is straightforward, easy, and secure. You only want but 10 minutes to form an account and begin trading. Cryptp soft is a absolutely auto bot and is so accessible to everyone.

https://preview.redd.it/giu6kclgfnn51.jpg?width=1280&format=pjpg&auto=webp&s=f605d84ba2174f831ca825dbaffddf061b3a55b5
You do not want to perceive trading lingo to use Immediate Edge. The following steps can get you started with this robot.
STEP ONE: Fill the Signup type

Visit the Cryptp soft home page and register your name, phone number, and email in the provided kind. You will be asked to verify your phone variety via a text code and email through a link. CryptoVibes will ascertain that the Cryptp soft registration process is secure.

Their web site is SSL secured to confirm that hackers cannot steal personal information submitted through it. Cryptp soft cyber safety policy states that they're GDPR adherent. This suggests that they handle your knowledge with strict privacy.
STEP TWO: Get matched with a broker

The Cryptp soft Software then matches you with one in every of their partner brokers. The role of the broker is to receive deposits and facilitate transactions. We have a tendency to have determined that Cryptp soft only partners with regulated brokers.

With a regulated broker, they guarantee that your cash is safe. Reputable regulators such as the FCA, FSB, ASIC, and CySEC need brokers to segregate deposits and submit periodic reports on deposit usage.
You wold like a deposit of a minimum of $250 to trade with Immediate Edge. Do not confuse this quantity with the value of the robot. Cryptp soft does not need any license fee. The house owners of this robot build money by charging a small commission on the profits generated through the app
Deposits with Cryptp soft should be created through Wire Transfer, Visa, and MasterCard. It takes a few seconds for a deposit to reflect in an exceedingly trader’s account. Cryptp soft does not charge any deposit fees.
The Cryptp soft does provide a demo account to help traders familiarize themselves with its web-trader. CryptoVibes recommends that you are doing demo trading before going to live to trade. Please note that the demo is for demonstrative purposes solely.
The results you receive on the platform are primarily based on historical information and could therefore not mirror what you'll get in live trading.
The Cryptp soft live trader comes with features to help you outline the amount of risk you are willing to require per trade. You wish to go through the demo account to familiarize with these features. As mentioned severally in this review, you do not want specialized skills to use this robot.
Live trading with Cryptp soft involves determining the quantity of capital you plan to risk per trade and clicking the live button. Scan our review of Bitcoin Trader for one more straightforward to use the robot.
*Remember all trading risks and you shouldn’t risk more then you'll be able to afford to lose.
How to get the most out of Cryptp soft App
We have identified the following tips as paramount in guaranteeing that you make the most of Immediate Edge.
Begin with a deposit of $250 – Given the level of risk involved in trading with Immediate Edge, you should start with a tiny investment.
Follow crypto market news – You need to determine the type of reports that drives volatility high and capitalize on them. Cryptp soft claims to form the foremost profits throughout high market volatility.
Trade for eight hours per day – In keeping with Immediate Edge, trading for at least eight hours per day can help maximize profits. Cryptp soft is entirely auto, and hence you'll be able to leave the robot running as you continue together with your daily errands. You are doing not want more than twenty minutes per day to observe your account.
Close trading sessions at the tip of the day – Leaving open positions overnight is doubtless to translate to losses since the markets can change considerably overnight. It is better to shut sessions even if in the negative and start trading again the subsequent day. With a correct risk management strategy, there is no would like to fret concerning periodic losses.
Following our review we tend to realize Cryptp soft to be legit. But, traders ought to take additional caution, provided that this bot comes at a degree of risk. Whereas the app claims it's potential to form profits of up to 50percent per day, you'll be able to additionally lose the complete deposit inside seconds. This is often not sudden for a high-frequency trading robot.
We recommend that you just apply the required risk management measures. As a rule of thumb don't risk more than 10percent of your trading capital per trade. Also, never trade with an amount you cannot afford to lose. It is prudent to start small and add cash as you get conversant with the various features on the platform.
Recently, a brand new trading software was added to the bitcoin investment trade. This software is termed Cryptp soft and it is allegedly created by a corporation or organization called the International Council for Bitcoin.
There is additionally a letter out there on their web site that has been signed by someone named David. This person claims to own earned over 1,000,000 as a results of investing in bitcoins. What’s very shocking concerning this letter is that David claims to have earned that huge quantity in just one trade. If we have a tendency to place it in simple words, David became a millionaire overnight.
We tend to highly doubt that a trading system that has been launched recently will have such potential. To verify the main points of this software and to determine its legitimacy, we have a tendency to conducted our own research and investigation.
Cryptp soft is a bitcoin trading software that’s meant to assist newbie traders get involved in Cryptocurrency trading with less risk than ancient investment opportunities. Cryptp soft software was created by The International Council For Bitcoin who is PRO Bitcoin trader Group behind the Cryptp soft software. Notice out all concerning Cryptp soft software by The International Council For Bitcoin.
Cryptp soft Software may be a nice development by a famous, well established and experienced bitcoin trader Investors with a viewpoint to enable traders to perform different tasks with ease and convenience.

https://preview.redd.it/uuh85yghfnn51.png?width=1238&format=png&auto=webp&s=d0558e6e123114b6624d5a724b3b9b5983e717e1
Cryptp soft Software is essentially a Binary choices trading software that is designed to assist traders win and predict the Binary options trend of their respective choices. Cryptp soft APP works as a code to urge financial success, shows traders how they'll make money on-line, helps them to find different ways in which to induce huge returns on their investment. The Cryptp soft Trading Software additionally provides analyses of Market conditions so that traders will recognize what ought to be their next step. Cryptp soft System gives secret cryptocurrency ways that ultimately help binary traders to create thousands of greenbacks solely for some bucks.
Several individuals can say that Cryptocurrency Trading may be a risky business and tend to remain faraway from it. But from my expertise, high volatility means HIGH RETURN OF INVESTMENT in Crypto Market. But this can be where the Cryptp soft comes into play, the mathematical algorithm used by Cryptp soft Software takes the guesswork out choosing a winning profitable trade. You don’t must be an expert. Like I said earlier, I actually have personally tested the Cryptp soft and found the success rate is about ninety sevenpercent. I don’t apprehend concerning you, but a ninety seven% probability of earning a profitable trade is TERRIBLY GOOD! I’ve never come across something like this trading software before. Keep reading, below are my Cryptp soft results for the past week or so…
Watch over the Shoulder of a Professional Each Day and you'll be able to learn as you trade.
Averaging 97% Winning Weeks With Cryptp soft which suggests that more potential profits for you
Cryptp soft Software Are Fully Transparent
No previous experience with binary choices trading required
Web-based mostly, no need for downloads, additionally works on phones, tablets
You'll be able to Even Watch Cryptp soft Signals From Your Phone (iPhone Users — Photon Browser)
If you are ready to begin making cash online with an on the spot edge, there has never been a better chance than currently. If you enjoy surfing the web for countless hours trying for the next Trading Method Secrets, never being able to urge centered, being overloaded with conflicting information, and not creating cash on-line, you ought to probably leave this page right now and get back to that Cryptp soft System strategy
Cryptp soft bot could be a new cryptocurrency trading invention that comes with options that create this software stand out among others. It is conjointly an automatic trading platform that uses a smart program algorithm to detect favorable trading opportunities. It acts on its own or waits for a prompt command from the user depending on the software’s settings. But what makes this software unique and a favorite to individuals is what we have a tendency to shall unveil in this review.
There have been lots of unverified claims of how totally different cryptocurrency software have helped several people to make massive profits leading to Scam individuals. However, it's pertinent for cryptocurrency traders to verify if a particular trading software may be a scam or legit, which is also ?
After subjecting the features of the Cryptp soft bot software to a series of tests, the software isn't a scam however legit. The Cryptp soft bot is believed to have successful rate of 85%, that is a lot of than the 80percent benchmark for average software. The Cryptp soft bot has helped cryptocurrency traders to make sensible profits, which has been documented as testimonies on the software’s website.
Trading on the platform is straightforward and might not require experience. We had to verify the simplicity of the software, and we tend to discovered that the software is easy to navigate. The demo trading feature of the software makes it potential for brand new users to hold out trading activities in an exceedingly simulated atmosphere while not having to risk their investment. This any gives credence to the legitimacy of the software because it ensures that new users get accustomed to the features of the software before continuing to measure to trade
As earlier stated, the Cryptp soft bot could be a high-tech program software that comes with exceptional options that makes it among the simplest cryptocurrency trading software in the blockchain market. The outstanding features of the Cryptp soft bot embody the subsequent:
https://www.cryptoerapro.com/cryptosoft/

http://www.cryptoerapro.com/

https://twitter.com/cryptoerapro

https://www.instagram.com/cryptoerapro/

https://www.pinterest.co.uk/cryptoerapro/
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Immediate Edge Review, Is Immediate Edge SCAM Or Legit Trading App?

Immediate Edge Review, Is Immediate Edge SCAM Or Legit Trading App?

Immediate Edge Review: Is This Crypto Robot Legit or Scam
Immediate Edge Review and investigation 20twenty. The Immediate Edge app is a crypto, forex and choices trading robot utilized by folks to automatically obtain and sell Bitcoin and create profits. Wanting at the website, many people claim it helped them move from rags-to-riches trading Bitcoin. Further, some claims linked it to Ronaldo and Sir Alex Ferguson

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Is Immediate Edge app legit or scam? Whereas the claims of its linkage to the higher than celebrities are unverifiable, we tend to can verify that the app is not a scam and permits individuals to trade Bitcoin using the Fibonacci strategy with ten minutes time frames
The app, that allows people to deposit at least $250 through mastercard and Sofort, scores 88% rate and a 5 stars as a real software
Since there are several scam cryptos, forex and options brokers who trick individuals to depositing money, and then they run away with the funds, we have taken time to review this software to determine if it is real or a scam.
Is Immediate Edge scam or legit
High success rate is reported by users with this software.
The Immediate Edge web site provides truthful claims about the service though it will not mean the crypto trading risks are eliminated with its use.
Customers should start with the minimum investment and increase it when satisfied with the utilization of the app.
Click the link to access Immediate Edge official web site or keep reading to understand more
This software will not seem to be a scam and users report that it helped them make real money trading on it.b site
What is Immediate Edge App?
Immediate Edgecould be a robot or auto-trading software that allows folks to trade forex, crypto and binary choices. A user deploys the algorithm-primarily based bot, which relies on a trading strategy that's automatically executed on a broker trading platform once deployed.
The strategy is coded or set like to permit the user to automatically get and sell crypto, stock or choices on the broker platform at favorable prices, to form profits. It can do automatic market analysis by analyzing a vast amount of knowledge from completely different sources, at intervals seconds and with high accuracy, then use the data to predict the costs. It can then come up with a transparent buy or sell tradable signal and then execute it automatically by shopping for and/or selling on the broker platform.
The software can, therefore, save a trader thousands of manual hours and labor they might have spent analyzing information to form trading choices and to follow the markets and to position and close trades. You conjointly do not want to understand anything concerning crypto, stock or option trading to use this auto trading app, although it is suggested to possess this information to keep improving on trading.
Trading bots will achieve high success rates of more than 90p.c and have been tested to work. You may be searching for Immediate Edge scam but the website can tell you that you can expect to earn between $950 and $a pair of,two hundred per day using the software but that depends on your expertise. As a newbie, you'll not start making that a lot of immediately and conjointly it depends on how a lot of you invest. With an investment of $250, you'll be able to expect to form a lot of lesser although some people claim to own made $12a pair of in a very few hours using this software.
That will not mean Immediate Edge is error-free. There still is a heap of unpredictable high volatility in crypto and bots will make mistakes and errors to create losses. Auto trading robots are better employed in combination with manual trading strategies.

https://preview.redd.it/1zkt9v3johm51.jpg?width=1280&format=pjpg&auto=webp&s=85f7e7f5d0e9d6b60b4a8a6e37bb344dbbb8305c
Immediate Edge Review
How will Immediate Edge work?
All a user has to try and do is join up at the Immediate Edge web site, then deposit funds to have access to the robot, when which they can begin trading by switching on the bot. It will would like no control or intervention from humans, beyond beginning and stopping it.
You additionally need to stay checking, daily, to observe the performance of the software in doing its job and ensure that it is earning any returns needless to say. From there, you can confirm whether or not to extend or decrease your investment towards crypto, options or stock trading using this robot.
You'll be able to also monitor performance to be ready to regulate the trading settings from your dashboard and optimize totally different features of the trading bot for instance set amount of trades or amount to invest in every trade.
Founder of Immediate Edge
In line with the Immediate Edge website, this trading bot was founded by Edwin James. Reportedly, he created billions with forex, crypto, and binary options trading and still shares his strategies on the way to trade the assets on the app.
He founded the app to create it potential for brand spanking new traders to create cash in less than 3 minutes of signing up.
How to sign up on Immediate Edge:
Registration: Registering or signing up on the website is free but to start trading, you want to deposit no less than $250. You discover a registration type on the top right of the page, on that you type in your email, full names and phone numbers and country code. Create a password to be used for logging in later.
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Withdrawals, user verification, cost of using the app and alternative options

The payouts or withdrawals are made by filling letter of invitation type on the funds’ management page and it can take two operating days to replicate in your checking account. No fee is charged on withdrawals. You'll withdraw your cash including the capital while not a lot of problem on this app, that is better than several that don't enable withdrawals at any time
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Binary Options Review; Best Binary Options Brokers

Binary Options Review; Best Binary Options Brokers

Binary Options Review; Best Binary Options Brokers
We have compared the best regulated binary options brokers and platforms in May 2020 and created this top list. Every binary options company here has been personally reviewed by us to help you find the best binary options platform for both beginners and experts. The broker comparison list below shows which binary trading sites came out on top based on different criteria.
You can put different trading signals into consideration such as using payout (maximum returns), minimum deposit, bonus offers, or if the operator is regulated or not. You can also read full reviews of each broker, helping you make the best choice. This review is to ensure traders don't lose money in their trading account.
How to Compare Brokers and Platforms
In order to trade binary options, you need to engage the services of a binary options broker that accepts clients from your country e.g. check US trade requirements if you are in the United States. Here at bitcoinbinaryoptionsreview.com, we have provided all the best comparison factors that will help you select which trading broker to open an account with. We have also looked at our most popular or frequently asked questions, and have noted that these are important factors when traders are comparing different brokers:
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submitted by Babyelijah to u/Babyelijah [link] [comments]

A complete guide of and debunking of audio on Linux, ALSA and Pulse

Hey fellow penguins,
A few days ago, an user asked about audio quality on Linux, and whether it is worse or better than audio on Windows. The thread became a mess quickly, full of misconceptions and urban myths about Linux. I figured it would be worthwhile to create a complete guide to Linux audio, as well as dispelling some myths and misconceptions.
To all be on the same page, this is going to be thorough, slowly introducing more concepts.

What is sound? How and what can I hear?

You might remember from high school that sound is waves traveling through the air. Vibrations of any kind cause molecules in the air to move. When that wave form finds your ears, it causes little hairs in your ear to move. Different hairs are susceptible to different frequencies, and the signals sent by these hairs are turned into sound you hear by your brain.
In reality it is a little more complicated, but for the sake of this post, that's all you need to know.
The pitch of sound comes from its frequency, the 'shorter' the waves are in a waveform, the higher the sound. The volume of sound comes from how 'tall' the waves are. Human hearing sits in a range between 20Hz and 20,000 Hz, though it deviates per person. Being the egocentric species we are, waves below 20 Hz are called 'infrasound' and waves above 20kHz are called 'ultrasound.' Almost no humans can hear beyond ultrasound, you will find that your hearing probably cuts off at 16kHz.
To play around with this, check out this tone generator, you can prove anything above with this yourself. As a fun fact: human hearing is actually really bad, we've among the most limited frequency ranges. A cat can hear up to 40kHz, and dolphins can even hear up to 160kHz!!
FACT: Playing loud music is dangerous! If you listen to music and you are feeling a discomfort, you should turn the volume down. A true alert is when you hear a beep - this is called tinnitus, and that beep you're hearing is pretty much the death cry of the cells that can hear that frequency. That beep is the last time you will hear that very specific frequency ever again. Please, listening to loud music is not worth the permanent hearing damage, please dial it down for your own sake! <3

How does my computer generate sound?

To listen to sound, you will probably be using headphones or speakers, inside of them are cones that are driven by an electromagnet, causing them to vibrate at very precise frequencies. This is essentially how sound works, though modern headphones certainly can be pretty complex.
To drive that magnet, an audio source will send an analog signal (a waveform) over a wire to the driver, causing it to move at the frequency of that waveform. This is in essence how audio playback works; and we're not going to get into it much deeper than this.
Computers are digital - which is to say, they don't do analog; processors understand ON and OFF, they do not understand 38.689138% OFF and 78.21156% ON. When converting an analog signal (like sound) to a digital one, we make use of a format called PCM. For PCM to be turned into an analog signal, you need a DAC - or as you probably know it: a sound card. DAC stands for 'Digital to Analog Converter', or some people mistakenly call it "Digital Audio ConverteChip"
PCM stands for Pulse-code Modulation, which is a way to represent sampled analog signals in a digital format. We're not going to get into it too much here, but imagine taking a sample of a waveform at regular intervals and storing the value, and then rounding that value to a nearest 'step' (remember this). That's PCM.
The fidelity of PCM comes from two elements, which we are going to discuss next: sampling rate and bit depth.

What is sampling rate? Or: HOW SOUND GOOD?

Sampling rate is the most important part of making PCM sound good. Remember how humans hear in a range of 20Hz to 20kHz? The sample rate of audio has a lot to do with this. You cannot capture high frequencies if you do not capture samples often enough. Since our ears can hear up to 20 kHz, you would imagine that 20kHz would be ideal for capturing audio; however, a result of sampling is that you actually need twice the sample rate, this is called the Nyquist-Sannon sampling theorem, which is a complicated thing. Just understand that to reproduce a 20kHz frequency, you need a sample rate of 40kHz.
To have a little bit of room and leeway, we settled on a sample rate of 48kHz (a multiple of 8) for playback, and 96kHz for recording. We record at this frequency only to make sure absolutely no data is lost. You might be more familiar with 44.1kHz for audio, which is a standard we settled on for CD playback and NTSC. A lot of scientific research has been done on sound quality, and there is no evidence to suggest people can tell the difference between 48kHz or anything higher.
MYTH BUST: Humans cannot hear beyond 20 kHz, period. Anyone who claims to be able to is either supernatural or lying to you - I'll let you choose which.

What is bit-depth? Or: HOW IT MAKE SOUND REALLY NICE?

Remember how I told you to remember that PCM rounds values to the nearest step? This has to do with how binary works. The more bits, the bigger the number you can store. In PCM, the bit-depth decides the number of bits of information in each sample. With 16-bit, the range of values that can be stored is 0 to 65535. Going beyond this is pointless for humans, with no scientific research showing any proven benefit, though marketeers would like you to believe there's benefits.
MYTH BUST: 24-bit depth is often touted as 'high-resolution audio', claiming benefits of a better sonic experience. Such is nothing more than marketing speech, there is no meaningful data 24-bit can capture that 16-bit cannot.

Channels? Or: HOW IT CAN MAKE SOUND IN LEFT BUT NOT RIGHT?

We'll briefly touch on the last part of PCM audio, channels. This is very self explanatory, humans have two ears and can hear separate sounds on both of them, which means we have stereo hearing. As a result, most music is recorded with 2 channels. For some surround settings, you need more channels, this is why you may have heard of 5.1 or 7.1; the first digit is the amount of channels the PCM carries.
For most desktop usage, the only sound we care about is 2-channel PCM.

Recap

So, we've covered all the elements of PCM sound. Let's go over it quickly: sample rate is expressed in Hz and is how often a sample of a waveform is captured, representing the x-axis of a waveform. Bit-depth is the bits of information stored in each sample, and represents the y-axis of the waveform. Channels decide how many simultaneous outputs the PCM can drive separately, since we have 2 ears, you need at least two channels.
As a result, the standard audio playback for both consumers and professionals is 48kHz, 16-bit, 2 channel PCM. This is more than enough to fully represent the full range of human hearing.

How it works in Linux

So, now that we know how PCM works, how does Linux make sound? How can you make Linux sound great? A few important components come into play here, and we'll need to discuss each of them in some detail.

ALSA

ALSA is the interface to the kernel's sound driver. ALSA can take a PCM signal and send it to your hardware by talking to the driver. Something important to know about most DACs is that they can only take one signal at a time, actually. That means that only a single application can send sound to ALSA at once. Long ago, in a darker time, you couldn't watch a movie while listening to music!
This problem was solved a long time ago with the use of alsalib, but doing mixing at a library level isn't a very good solution to the problem. This gave rise to sound servers, of which many have existed. Before PulseAudio, esound was a very popular one but had many problems, eventually it was succeeded by PulseAudio.

PulseAudio

When you think audio on Linux, PulseAudio is probably among the first things you think of. PulseAudio is NOT a driver, nor does it talk to your drivers. Actually, PulseAudio only does two things that we'll discuss in detail later. PulseAudio talks to ALSA, taking control of its single audio stream, and allows other applications to talk to PulseAudio instead. Pulse is an 'audio multiplexer', turning multiple signals into one through a process that is called mixing. Mixing is an incredibly complicated subject that we won't talk about here.
To be able to mix sounds, one must make sure that all the PCM sources are in the same format (the one that's being sent to ALSA); if the PCM format being sent to Pulse does not match the PCM format being sent to ALSA, pulse does a step before mixing it called resampling. Resampling is another very complicated subject that can turn a 8kHz, 4-bit, 1-channel PCM stream into a 24kHz, 24-bit, 2-channel PCM stream.
These two things allow you to play a game, listen to music and watch YouTube, and notifications to produce a sound all at the same time. PulseAudio is the most critical element of the Linux sound stack.
FACT: PulseAudio is a contentious subject, many people have a dislike for this particular bit of software. In all honesty, PulseAudio was brought to the general public in a bit of a premature state, breaking audio for many people. PulseAudio these days is a very stable, solid piece of software. If you have audio issues these days, it's usually a problem in ALSA or your driver.

What about JACK and PipeWire?

PulseAudio isn't the only sound servedaemon available for Linux, though it is certainly the most popular and most likely the default of whatever distribution you are using. PulseAudio has become a bit of a standard for Linux sound and has by far the best compatibility with most applications, but that doesn't mean there aren't alternatives.
JACK (JACK Audio Connection Kit, a recursive acronym like GNU) is a sound server focused primarily on low latency. If you are doing professional audio work on Linux, you will already be very familiar with JACK. JACK's development is very focused on low latency, real-time audio and is critical for such people. JACK is available on most distros as an alternative, and you can try it for yourself if you so want; but you might find some applications do not work nicely with JACK.
PipeWire is a project that is currently in development, looking to solve key problems that exist in current sound servers. PipeWire isn't just a sound server but also handles the multiplexing of video sources (like a camera). Special attention has been put into working with sandboxed applications (like Flatpaks), which is an area where PulseAudio is lacking. PipeWire is a very promising project that might very well succeed PulseAudio in the future and you should expect to see appearing in distribution repositories very soon. You can try it yourself right now, though it isn't quite as easy to get started with as JACK is.
More audio servers exist, but are beyond the scope of this post.

What is resampling?

Resampling is the process of turning a PCM stream into another PCM stream of a different resolution. Your DAC only accepts a limited range of PCM signals, and it is up to the software to make sure the PCM stream is compatible. There is almost no DAC out there that doesn't support 44.1kHz, 16-bit, 2-channel PCM, so this tends to be the default. When you play an audio source (like an OggVorbis file), the PCM stream might be 96kHz, 24-bit, 2-channel PCM.
To fix that, PulseAudio will use a resampling algorithm. There are two kinds of resampling methods: upsampling and downsampling. Upsamling is lossless, since you can always represent less data with more data. Downsampling is lossy by definition, you cannot represent 24-bit PCM with 16-bit PCM.
MYTH: Downsampling is a loss in quality! This is only true in a technical sense, or if you are downsampling to less than 48kHz, 16-bit PCM. When you downsample a 96kHz, 24-bit PCM stream to a 48kHz, 16-bit stream, no meaningful data is lost in the process; because the discarded data lies outside of the human ear's hearing range.
FACT: Resampling is expensive. Good quality resampling algorithms actually take a non-trivial amount of processing power. PulseAudio defaults to a resampling method with a good balance between CPU time used and quality.

What is mixing?

Mixing is the process of taking two PCM streams and combining them into one. This is extremely complicated and not something we're going to discuss at length. It is not important to understand how this works, only to understand that it exists. Without mixing, you wouldn't be able to hear sounds from multiple sources. This is true not just for PulseAudio and computer sound, this is true for anything. In real life, you might use an A/V receiver to accept sound from your TV and music player at once, the receiver then mixes the signals and plays it through your speakers.

What is encoding?

Finally we can talk a little about encoding. Encoding is the process of taking a PCM stream and writing it to a permanent format, two types exist. You have lossy encoding and lossless encoding. Lossy encoding removes data from the PCM stream to safe space. Usually the discarded data is useless to you, and will not make a difference in sound quality; examples of lossy encoding are MP3, AAC and Ogg Vorbis. Lossless encoding takes a PCM stream and encodes it in such a way that no data is lost, examples of lossless encodings are FLAC, ALAC and WAV.
Note that lossy and lossless do not mean compressed and uncompressed. A lossless format can be compressed and usually is, as uncompressed lossless encoding would be very large; it would just be the raw PCM stream. An example of lossless uncompressed audio is WAV.
A new element encodings bring is their bit rate, not to be confused with samplerate and bit depth. Bit rate has to do with how much data is stored in every second of audio. For a lossless, uncompressed PCM stream this is easy to calculate with the formula bit rate = sample rate * bit depth * channels, for 16-bit, 48kHz, 2 channel PCM this is 1,5 Mbit. To get the value in bytes, divide by 8, thus 192kB per second.
The bit rate of an encoder means how much the audio will be compressed. PCM compression is super complicated, but it generally involves discarding silence, cutting off frequencies you cannot hear, and so forth. Radio encoding has a bit rate of roughly 128 Kbps, while most CDs have a bit rate of 1360kbps.
Lastly, there is the concept of VBR and CBR. VBR stands for Variable Bit Rate, which CBR stands for Constant Bit Rate. In a VBR encoding, the encoder aim for a target bit rate that you set, but it can deviate if it thinks it needs more or less. CBR will encode a constant bit rate, and will never deviate.
MYTH: Lossless sounds better than lossy. This is blatantly untrue, lossless audio formats were created for perservation and archival reasons. When you encode a lossy file from a lossless source, and you make sure that it's a 48kHz, 16-bit PCM encoding, you will not lose any important information. What is enough depends on the quality of the encoder. For OggVorbis, 192kbps is sufficient, for MP3, 256kbps should be preferred. 320kbps is excessive and the highest quality supported by MP3. In general, 256kbps does the trick, but with storage being abundant these days, you can play it safe and use 320kbps if it makes you feel better.
MYTH: CBR is better than VBR. There is no reason not to use VBR at all, there is no point in writing 256Kbps of data if there is only silence or a constant tone. Let your encoder do what it does best!
FACT: Encoding a lossy format to another lossy format will result in a loss of data! You will compress data that is already compressed, which is really bad. When encoding to a lossy format, always use a high quality recording in a lossless format as the source!
I DON'T BELIEVE YOU: This article from the guys Xiph (the people who brought you FLAC and Ogg Vorbis) explain it better than I can: https://people.xiph.org/%7Exiphmont/demo/neil-young.html

TL;DR, I JUST WANT THE BEST SOUND QUALITY

Here is a quick guide to achieving great sound quality on Linux with the above in mind.
As you can see, there's little you can do in Linux in the first place, so what can you do if you want better sound?
MYTH: Linux sound quality is worse than Windows. They are exactly the same, Pulse doesn't work that different from how Windows does mixing and resampling.
MYTH: Linux sound quality can be better than Windows. They are exactly the same. All improvements in quality come from the driver and your DAC, not the sound server. Pulse and ALSA do not touch the PCM beyond moving it around and resampling it.
I hope this (long) guide was of help to you, and helped to dispell some myths. Did I miss anything? Ask or let me know, and I'll answer the best I can. Did I make any factual errors? Please correct me with a source and I'll amend the post immediately.
submitted by _Spell_ to linux [link] [comments]

LCD Arduino project Display Heart Rate

LCD Arduino project brief introduction
Some time ago, I found a heart rate sensor module MAX30100 in shopping online. This module can collect blood oxygen and heart rate data of users, which is also simple and convenient to use.
According to the data, I found that there are libraries of MAX30100 in the Arduino library files. That is to say, if I use the communication between LCD Arduino and MAX30100, I can directly call the Arduino library files without having to rewrite the driver files. This is a good thing, so I bought the module of MAX30100.
I decided to use Arduino to verify the heart rate and blood oxygen collection function of MAX30100. With STONE TFT LCD screen for monitoring blood pressure.
Note: this module by default only with 3.3 V level MCU communications, because it defaults to using IIC pin pull up the resistance of 4.7 K to 1.8 V, so there is no communication with the Arduino by default, if you want to commune with the Arduino and need two 4.7 K of the IIC pin pull-up resistor connected to the VIN pin, these contents will be introduced in the back of the chapter.

Functional assignments

Before starting this project, I thought about some simple features:
• Heart rate data and blood oxygen data were collected
• Heart rate and blood oxygen data are displayed through an LCD screen
These are the only two features, but if we want to implement it, we need to do more thinking:
• What master MCU is used?
• What kind of LCD display?
As we mentioned earlier, we use Arduino for the MCU, but this is an LCD Arduino project, so we need to choose the appropriate LCD display module. I plan to use the LCD display screen with a serial port. I have a STONE STVI070WT-01 displayer here, but if Arduino needs to communicate with it, MAX3232 is needed to do the level conversion.
Then the basic electronic materials are determined as follows:
  1. Arduino Mini Pro development board
  2. MAX30100 heart rate and blood oxygen sensor module
  3. STONE STVI070WT-01 LCD serial port display module
  4. MAX3232 module

Hardware Introduction

MAX30100

The MAX30100 is an integrated pulse oximetry and heart rate monitor sensor solution. It combines two LEDs, a photodetector, optimized optics, and low-noise analog signal processing to detect pulse oximetry and heart-rate signals. The MAX30100 operates from 1.8V and 3.3V power supplies and can be powered down through software with negligible standby current, permitting the power supply to remain connected at all times.

Applications

● Wearable Devices
● Fitness Assistant Devices
● Medical Monitoring Devices

Benefits and Features

1、Complete Pulse Oximeter and Heart-Rate SensorSolution Simplifies Design
• Integrated LEDs, Photo Sensor, and high-Performance Analog Front -End
• Tiny 5.6mm x 2.8mm x 1.2mm 14-Pin OpticallyEnhanced System-in-Package
2、Ultra-Low-Power Operation Increases Battery Life for wearable Devices
• Programmable Sample Rate and LED Current for Power Savings
• Ultra-Low Shutdown Current (0.7µA, typ)
3、Advanced Functionality Improves Measurement Performance
• High SNR Provides Robust Motion Artifact Resilience
• Integrated Ambient Light Cancellation
• High Sample Rate Capability
• Fast Data Output Capability

Detection Principle


https://preview.redd.it/254ou0pq20a51.jpg?width=817&format=pjpg&auto=webp&s=2d3287e1973b328412e14c6e56f74e6f5975153e
Just press your finger against the sensor to estimate pulse oxygen saturation (SpO2) and pulse (equivalent to heartbeat).
The pulse oximeter (oximeter) is a mini-spectrometer that USES the principles of different red cell absorption spectra to analyze the oxygen saturation of the blood. This real-time and rapid measurement method is also widely used in many clinical references.
I will not introduce the MAX30100 too much, because these materials are available on the Internet. Interested friends can look up the information of this heart rate test module on the Internet, and have a deeper understanding of its detection principle.

Introduction to the STVI070WT-01 displayer

In this project, I will use the STONE STVI070WT-01 to display the heart rate and blood oxygen data.
The driver chip has been integrated inside the display screen, and there is software for users to use. Users only need to add buttons, text boxes, and other logic through the designed UI pictures, and then generate configuration files and download them into the display screen to run.
The display of STVI070WT-01 communicates with MCU through the UART RS232 signal, which means that we need to add a MAX3232 chip to convert the RS232 signal into a TTL signal so that we can communicate with Arduino MCU.

https://preview.redd.it/kyyv3hou20a51.jpg?width=749&format=pjpg&auto=webp&s=512b7285eb763e518a85d0b172dabc08b15cab6a
If you are not sure how to use the MAX3232, please refer to the following pictures:

https://preview.redd.it/5laiqsxw20a51.jpg?width=653&format=pjpg&auto=webp&s=126fb57d5171d942046277896e1552995df0ce13
If you think the level conversion is too troublesome, you can choose other types of displayers of STONE Tech, some of which can directly output uart-TTL signal.
The official website has detailed information and introduction:
https://www.stoneitech.com/
If you need video tutorials and tutorials to use, you can also find it on the official website.

https://preview.redd.it/0rkfwxk530a51.jpg?width=867&format=pjpg&auto=webp&s=32803906927fff48bb8fbc1b0a7c073cfe54c5e5

Development steps

Three steps of STONE display screen development:
• Design the display logic and button logic with STONE TOOL software, and download the design file to the display module.
• MCU communicates with the STONE LCD display module through the serial port.
• With the data obtained in step 2, the MCU does other actions.

STONE TOOL software installation

Download the latest version of the STONE TOOL software (currently TOOL2019) from the website, and install it.
After the software is installed, the following interface will be opened:

https://preview.redd.it/evuct2w630a51.jpg?width=848&format=pjpg&auto=webp&s=201d40fdb81e2c4fd229992daf15501f2cb177a0
Click the "File" button in the upper left corner to create a new project, which we will discuss later.

LCD Arduino

Arduino is an open-source electronic prototype platform that is easy to use and easy to use. It includes the hardware part (various development boards that conform to the Arduino specification) and the software part (Arduino IDE and related development kits).
The hardware part (or development board) consists of a microcontroller (MCU), Flash memory (Flash), and a set of universal input/output interfaces (GPIO), which you can think of as a microcomputer motherboard.
The software part is mainly composed of Arduino IDE on PC, related board-level support package (BSP) and rich third-party function library. With the Arduino IDE, you can easily download the BSP associated with your development board and the libraries you need to write your programs.
Arduino is an open-source platform. So far, there have been many models and many derived controllers, including Arduino Uno, Arduino Nano, Arduino Yun and so on. In addition, the Arduino IDE now not only supports the Arduino series development boards but also adds support for popular development boards such as Intel Galileo and NodeMCU by introducing BSP.
Arduino senses the environment through a variety of sensors, controlling lights, motors and other devices to feedback and influence the environment. The microcontroller on the board can be programmed with an Arduino programming language, compiled into binaries, and burned into the microcontroller. Programming for Arduino is implemented with the Arduino programming language (based on Wiring) and the Arduino development environment (based on Processing). Arduino-based projects can contain Arduino only, as well as Arduino and other software running on PC, and they communicate with each other (such as Flash, Processing, MaxMSP).

HMI for Arduino serial display TFT LCD project development environment

The Arduino development environment is the Arduino IDE, which can be downloaded from the Internet.
Log into the official website of Arduino and download the software
https://www.arduino.cc/en/Main/Software?setlang=cn
After installing the Arduino IDE, the following interface will appear when you open the software:

https://preview.redd.it/2ajmkke830a51.jpg?width=567&format=pjpg&auto=webp&s=56dc9dd01c98b231c782ef94d24a9f620c4897b3
The Arduino IDE creates two functions by default: the setup function and the loop function.
There are many Arduino introductions on the Internet. If you don't understand something, you can go to the Internet to find it.

LCD Arduino Project implementation process

hardware connection

To ensure that the next step in writing code goes smoothly, we must first determine the reliability of the hardware connection.
Only four pieces of hardware were used in this project:
  1. Arduino Mini pro-development board
  2. STONE STVI070WT-01 TFT-LCD display screen
  3. MAX30100 heart rate and blood oxygen sensor
  4. MAX3232 (rs232-> TTL)
The Arduino Mini Pro development board and STVI070WT-01 TFT-LCD display screen are connected through UART, which requires level conversion through MAX3232, and then the Arduino Mini Pro development board and MAX30100 module are connected through IIC interface. After thinking clearly, we can draw the following wiring picture:

https://preview.redd.it/w2e5c9ha30a51.jpg?width=769&format=pjpg&auto=webp&s=95129db838d6c358e986c88a4d1348f4783cd0ab
https://preview.redd.it/eom4wiia30a51.jpg?width=1091&format=pjpg&auto=webp&s=ff56c3afaf063d7785a5b85ba283532be0dd896e
Make sure there are no errors in the hardware connection and proceed to the next step.

STONE TFT LCD user interface design

First of all, we need to design a UI display image, which can be designed by PhotoShop or other image design tools. After designing the UI display image, save the image in JPG format.
Open the software STONE TOOL 2019 and create a new project:

https://preview.redd.it/sqjii2mc30a51.jpg?width=1004&format=pjpg&auto=webp&s=12f0a87d6c2ca8decaff241d5a0b50a3a1aece89
https://preview.redd.it/4ta8cdlc30a51.jpg?width=871&format=pjpg&auto=webp&s=b31ac5e612a2c809e29f63974a04ba25bff83788
Remove the image that was loaded by default in the new project, and add the UI image that we designed.
Add the text display component, design the display digit and decimal point, get the storage location of the text display component in the displayer.
The effect is as follows:

https://preview.redd.it/2mfqapoe30a51.jpg?width=1335&format=pjpg&auto=webp&s=aacfa0fde88defacd127ea9d9d27ab006ab618dd
Text display component address:
• Connection sta : 0x0008
• Heart rate : 0x0001
• Blood oxygen : 0x0005
The main contents of the UI interface are as follows:
• Connection status
• Heart rate display
• Blood oxygen showed

Generate configuration file

Once the UI design is complete, the configuration file can be generated and downloaded to the STVI070WT-01 displaye.

First, perform step 1, then insert the USB flash drive into the computer, and the disk symbol will be displayed. Then click "Download to u-disk" to Download the configuration file to the USB flash drive, and then insert the USB flash drive into STVI070WT-01 to complete the upgrade.

MAX30100

MAX30100 communicates via IIC. Its working principle is that the ADC value of heart rate can be obtained through infrared led irradiation. The MAX30100 register can be divided into five categories: state register, FIFO, control register, temperature register, and ID register. The temperature register reads the temperature value of the chip to correct the deviation caused by the temperature. The ID register can read the chip's ID number.

https://preview.redd.it/221fq8vg30a51.jpg?width=848&format=pjpg&auto=webp&s=43e93284ac35cf1944a77d79ff9a2f662e540c7e

MAX30100 is connected with the Arduino Mini Pro development board through the IIC communication interface. Because there are ready-made MAX30100 library files in the Arduino IDE, we can read the heart rate and blood oxygen data without studying the registers of MAX30100.
For those who are interested in exploring the MAX30100 register, see the MAX30100 Datasheet.

Modify the MAX30100 IIC pull-up resistor

It should be noted that the 4.7k pull-up resistance of the IIC pin of MAX30100 module is connected to 1.8v, which is not a problem in theory. However, the communication logic level of the Arduino IIC pin is 5V, so it cannot communicate with Arduino without changing the hardware of the MAX30100 module.Direct communication is possible if the MCU is STM32 or another 3.3v logic level MCU.
Therefore, the following changes need to be made:

https://preview.redd.it/jti57usl30a51.jpg?width=521&format=pjpg&auto=webp&s=c56b1b1a8294d60a8f9e931e411305f68c5c5559
Remove the three 4.7k resistors marked in the picture with an electric soldering iron. Then weld two resistors of 4.7k at the pins of SDA and SCL to VIN, so that we can communicate with Arduino.

Arduino serial display LCD

Open the Arduino IDE and find the following buttons:

https://preview.redd.it/990d3bdp30a51.jpg?width=853&format=pjpg&auto=webp&s=24136c385601b69d5afc67842358b102373277ef
Search for "MAX30100" to find two libraries for MAX30100, then click download and install.

https://preview.redd.it/4n167pbv30a51.jpg?width=933&format=pjpg&auto=webp&s=cef50833667bae3f30ac94f5a48b43795b779845
After the installation, you can find the Demo of MAX30100 in the LIB library folder of LCD Arduino:

https://preview.redd.it/rn05xgvw30a51.jpg?width=911&format=pjpg&auto=webp&s=3709bc7c5be36ebdd14c01cb0b7c1933953425b0
Double-click the file to open it.

https://preview.redd.it/q6fqylky30a51.jpg?width=819&format=pjpg&auto=webp&s=8073917be374a72bef2977b4b11ccb2b56fa944e
This Demo can be directly tested. If the hardware connection is ok, you can download the code compilation into the Arduino development board and see the data of MAX30100 in the serial debugging tool.
The complete code is as follows: /*
Arduino-MAX30100 oximetry / heart rate integrated sensor library
Copyright (C) 2016 OXullo Intersecans
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see .
*/
#include
#include "MAX30100_PulseOximeter.h"
#define REPORTING_PERIOD_MS 1000
// PulseOximeter is the higher level interface to the sensor
// it offers:
// * beat detection reporting
// * heart rate calculation
// * SpO2 (oxidation level) calculation
PulseOximeter pox;
uint32_t tsLastReport = 0;
// Callback (registered below) fired when a pulse is detected
void onBeatDetected()
{
Serial.println("Beat!");
}
void setup()
{
Serial.begin(115200);
Serial.print("Initializing pulse oximeter..");
// Initialize the PulseOximeter instance
// Failures are generally due to an improper I2C wiring, missing power supply
// or wrong target chip
if (!pox.begin()) {
Serial.println("FAILED");
for(;;);
} else {
Serial.println("SUCCESS");
}
// The default current for the IR LED is 50mA and it could be changed
// by uncommenting the following line. Check MAX30100_Registers.h for all the
// available options.
// pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);
// Register a callback for the beat detection
pox.setOnBeatDetectedCallback(onBeatDetected);
}
void loop()
{
// Make sure to call update as fast as possible
pox.update();
// Asynchronously dump heart rate and oxidation levels to the serial
// For both, a value of 0 means "invalid"
if (millis() - tsLastReport > REPORTING_PERIOD_MS) {
Serial.print("Heart rate:");
Serial.print(pox.getHeartRate());
Serial.print("bpm / SpO2:");
Serial.print(pox.getSpO2());
Serial.println("%");
tsLastReport = millis();
}
}
📷
This code is very simple, I believe you can understand it at a glance. I have to say that the modular programming of Arduino is very convenient, and I don't even need to understand how the driver code of Uart and IIC is implemented.
Of course, the above code is an official Demo, and I still need to make some changes to display the data to STONE's displayer.

Display data to the STONE display through Arduino LCD

First, we need to get the address of the component that displays the heart rate and blood oxygen data in STONE's displayer:
In my project, the address is as follows:
Heart rate display component address: 0x0001
Address of blood oxygen display module: 0x0005
Sensor connection status address: 0x0008
If you need to change the display content in the corresponding space, you can change the display content by sending data to the corresponding address of the display screen through the serial port of Arduino.
The modified code is as follows:
/*
Arduino-MAX30100 oximetry / heart rate integrated sensor library
Copyright (C) 2016 OXullo Intersecans
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see .
*/
#include
#include "MAX30100_PulseOximeter.h"
#define REPORTING_PERIOD_MS 1000
#define Heart_dis_addr 0x01
#define Sop2_dis_addr 0x05
#define connect_sta_addr 0x08
unsigned char heart_rate_send[8]= {0xA5, 0x5A, 0x05, 0x82,\
0x00, Heart_dis_addr, 0x00, 0x00};
unsigned char Sop2_send[8]= {0xA5, 0x5A, 0x05, 0x82, 0x00, \
Sop2_dis_addr, 0x00, 0x00};
unsigned char connect_sta_send[8]={0xA5, 0x5A, 0x05, 0x82, 0x00, \
connect_sta_addr,0x00, 0x00};
// PulseOximeter is the higher level interface to the sensor
// it offers:
// * beat detection reporting
// * heart rate calculation
// * SpO2 (oxidation level) calculation
PulseOximeter pox;
uint32_t tsLastReport = 0;
// Callback (registered below) fired when a pulse is detected
void onBeatDetected()
{
// Serial.println("Beat!");
}
void setup()
{
Serial.begin(115200);
// Serial.print("Initializing pulse oximeter..");
// Initialize the PulseOximeter instance
// Failures are generally due to an improper I2C wiring, missing power supply
// or wrong target chip
if (!pox.begin()) {
// Serial.println("FAILED");
// connect_sta_send[7]=0x00;
// Serial.write(connect_sta_send,8);
for(;;);
} else {
connect_sta_send[7]=0x01;
Serial.write(connect_sta_send,8);
// Serial.println("SUCCESS");
}
// The default current for the IR LED is 50mA and it could be changed
// by uncommenting the following line. Check MAX30100_Registers.h for all the
// available options.
pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);
// Register a callback for the beat detection
pox.setOnBeatDetectedCallback(onBeatDetected);
}
void loop()
{
// Make sure to call update as fast as possible
pox.update();
// Asynchronously dump heart rate and oxidation levels to the serial
// For both, a value of 0 means "invalid"
if (millis() - tsLastReport > REPORTING_PERIOD_MS) {
// Serial.print("Heart rate:");
// Serial.print(pox.getHeartRate());
// Serial.print("bpm / SpO2:");
// Serial.print(pox.getSpO2());
// Serial.println("%");
heart_rate_send[7]=(uint32_t)pox.getHeartRate();
Serial.write(heart_rate_send,8);
Sop2_send[7]=pox.getSpO2();
Serial.write(Sop2_send,8);
tsLastReport = millis();
}
}
Compile the code, download it to the Arduino serial display LCD development board, and you're ready to start testing.
We can see that when the fingers leave the MAX30100, the heart rate and blood oxygen display 0. Place your finger on the MAX30100 collector to see your heart rate and blood oxygen levels in real-time.

LCD Arduino project effect can be seen in the following picture:


https://preview.redd.it/k9u0jtg040a51.jpg?width=510&format=pjpg&auto=webp&s=1e9994109a072807a802eb1179b874f727aeff5a
https://preview.redd.it/0ow2lfg040a51.jpg?width=576&format=pjpg&auto=webp&s=b0f5f6ac073894c8b0c033549fce79fac1c90bc3
submitted by Tamesliu to arduino [link] [comments]

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