Arduino Forum: DIY-ECG Code Rework

I reworked the code for the DIY-ECG project to make it easier to read and understand. One major improvement was switching to p5.js for the browser-side JavaScript, which eliminated a lot of boilerplate code.

You can find all the details on the Arduino Forum:

https://forum.arduino.cc/t/project-presentation-real-time-ecg-data-acquisition-and-visualization-on-arduino-uno-q/1428063/26