neopixel-simulator

Simulates a neopixel strip in javascript for quick prototyping.

Installation

1. Clone repository
2. npm install
3. npm start
4. Visit http://localhost:8080 to view the test pattern

Write your own patterns!

Modify the code in index.js to quickly prototype your Neopixel patterns without compiling and uploading to an Arduino board. It's pretty close to real Arduino C syntax, so it's easily portable to the real hardware.

Custom pixel layout

By default, the Neopixel simulator will generate a straight strip of pixels. If you want to simulate a more complex layout, you can create the elements yourself in src/index.html. The only requirement is that each pixel have the pixel class, and a p-0 class (where 0 is the index of the pixel, incrementing).

Instead of new Neopixel(NUM_PIXELS) instantiate your strip with Neopixel.fromElement(STRIP_ELEMENT).

Arduino runtime simulator

The Arduino constructor takes two functions: begin and loop. begin is called once when the Arduino runtimes starts. loop is called continuously. Unlike javascript, Arduino is synchronous and you call delay to sleep between loop executions. In javascript, you need to use the await keyword and the delay function on the Arduino runtime object.