Category Archives: Experiments

A Custom Webpage to view your CryptoBalance (Binance)

Lately I have invested in cryptocurrencies, I leave you a page created by me to see the evolution of my profits, in this case I have invested €149 in FYI and €20 in BNB.
you can run it without uploading it to any web server. it connects to Binance and gets the current price every 10 seconds.
in the code you can easily see these amounts and customize it with your investments (purchase price and quantity)
In my case I have it published on my web space

the page call a api to Binance like:


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Barcode Generator EAN128, EAN13, QR, DataMatrix ( dll / exe versions)

This is my new barcode generator ( image based ) to create EAN128, EAN13, QR, DataMatrix Barcodes.

You can use it with 2 versions, commnad line version (standalone executable )  or a  dll to use with your .NET projects ,

You can Download it from this link:

here are these videos showing both the operation of the dll and the executable utility:



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ESP32 Asynchronous TCP/IP client and multi core task implementation with freeRTOS parallel task and queues intercommunication

This post is to comment the code of the project explained on:

you can donwload the code from my web page at the link: 


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HTML5 local storage

I have developed a simple HTML5 application that uses the HTML5 local storage is a list of “buy”, and can work offline, once loaded in the browser of an android phone or iPhone, you can work without internet connection:

Go to my example


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Mega Pairs Game



This game a”pairs game” features multiplayer possibilities of, is was made only for show  the features and  architecture of a multiplayer development, not for real production game,it uses a Sing in feature to login with Facebook, Google o Twitter credentials ( no need to register), the base is a canvas control that is named “arena” of the game, and only a bar menu to make all tasks.

 technologies used:

this are the architecture components used to develop the game:

at the server side:

  • node.js server
  • sqlite database

at the client side:

  • Javascript
  • Mootools
  • Bootstrap
  • HybridAuth

 How it works:

The first time when a user opens the page, observe mode is enabled for default, in this mode you can see all the movements of the game, but you can not interact or flip any card. when the user are sing in, then a new user appears at the left side and the user can flip 2 cards, once the user are in the game his score is saved for the next time game.


My next goal is that any user can modify the cards images, how to do it?:

To Test the Game


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