rpi-neopixel

WS281x ("Neopixel") LED strip control on a Raspberry Pi

This script helps me to control a WS2812B LED strip when my 3D printer does something.

See it in action (youtube.com)

Usage

sudo python ./control.py on|off|toggle|dim|bright|done|attention|fail|error|unlock

Available Arguments

• toggle
• on (default color; dim)
• off
• dim
• bright
• done (violet)
• attention (blue)
• fail (orange)
• error (red)
• unlock (removes lock file)

How does it work?

The script itself uses the rpi-ws281x-python library to control the LED strip.

In order to react to events triggered by my 3D printer I set up the following on the RPi:

• OctoPrint (with the Webhooks plugin) calls several API routes for different events (e.g. "Print done")
• Node-RED provides some API endpoints for the different commands & watches a GPIO pin (push button)

Beware! You have to use root privileges in order to use PWM on the Raspberry Pi. I made a new entry for this in my sudoers file (use visudo)

pi ALL=NOPASSWD:/home/pi/rpi-neopixel/control.py

Customization

You can set your default color and your own colors in the control.py script itself.

Credits

A huge THANK YOU to the contributors of rpi-ws281x-python

Special thanks to Tony DiCola ([email protected]) & Jeremy Garff ([email protected])

This repository and all it's containing files are licensed under the BSD-2-Clause license.