A simple MQTT controlled LED strip controller
The led controller contains multiple animations that can be contolled through an mqtt broker.
- Rainbow; A simple circular rainbow animation, built from a increasing angle on a hue wheel.
- Chase; A chase animation, with a build-up at the end of the strip, then the animation is reversed and the leds are progresively turned off.
- Static rainbow; Similar to the rainbow animation but the color is the same at a given time on the whole strip.
A raspberrypi 4 - 4Gb is used, along a ws2812b rgb led strip. Some part of the strip in beneath my Ender 5 3D printer, the other part on the inside of the front-top bar, to light up the printing plate. This is why the LED is separated in the code into WHEEL and STRIP. This allows to control the two parts separately (e.g. keep a white light on the plate but a rainbow on the rest of the printer).
The data-lane of the strip is connected to the pin 18 on the GPIO of the raspberrypi.
The software is simply run as a service on the raspberrypi
[Unit]
Description="LED controller for 3D printer's strip"
[Service]
ExecStart=<path to the build>
Restart=on-success
Type=simple
[Install]
WantedBy=multi-user.target