This project helps anyone to control LEDS on a NeoPixel Led Strip, thanks to 2 simple HTTP Get / API:

• http://ip:8083/switchAllOff? will switch off all the leds
• http://ip:8083/changeLed?ledId=[0-7]&red=[0-255]&green=[0-255]&blue=[0-255]&brightness=[0-100] will change the ledId selected with the color (red,green,blue) and the brightness passed.
• http://ip:8083/changeLedInRange?from=[0-7]&to=[0-7]&red=[0-255]&green=[0-255]&blue=[0-255]&brightness=[0-100] will change the ledId in the range [from,to] with the color provided.

This allows easy integrations with other applications running on the RPI.

The project works on Raspberry Pi Boards. It must be run as root: sudo node neopixel_server.js. The server listen on all interface: it's easy to change the code in order to run the server only on localhost; search and replace the code:

--> app.listen(8083);

with

--> app.listen(8083,'localhost');

Configuration tested with a Raspberry Pi Zero W