Control WS281x connected on Raspberry Pi via MQTT

For supported GPIOs please see rpi-ws281x-python

Environmental variables

• LED_GPIO (required)
• LED_COUNT (required)
• LED_CHANNEL (optional; default=0)
• LED_FREQ_HZ (optional; default=800000; 400000 or 800000)
• LED_DMA_NUM (optional; default=10; range=0-14)
• LED_BRIGHTNESS (optional; default=255; range=1-255)
• LED_INVERT (optional; default=0; 0 or 1)
• MQTT_BROKER (optional; default='localhost')
• MQTT_USER (optional; default=None)
• MQTT_PASSWORD (optional; default=None)
• MQTT_PORT (optional; default=1883; range=1-65535)
• MQTT_QOS (optional; default=1; range=0-2)
• MQTT_ID (optional; default='rpi-ws281x')
• MQTT_PREFIX (optional; default='rpi-ws281x')
• MQTT_DISCOVERY_PREFIX (optional; default='homeassistant')

docker-compose.yml

version: "3.6"
services:  
  rpi_ws281x:
    container_name: rpi_ws281x
    restart: unless-stopped
    image: pilotak/rpi-ws281x-mqtt
    privileged: true
    environment:
      - LED_GPIO=12
      - LED_COUNT=10

This image is ready to be used in HomeAssistant - supports MQTT discovery, for all other purposes, please see topics used below

MQTT topics

To set color

Send to topic: rpi-ws281x/command

Note: color and effect are optional keys, you can send both or just one or none in which case last color selected is used.

{
    "state": "ON",
    "color": {
        "r": 0,
        "g": 255,
        "b": 0
    },
    "effect": "Knight Rider"
}

To turn off

Send to topic: rpi-ws281x/command

{
    "state": "OFF"
}

Last state

Topic: rpi-ws281x/state

{
    "state": "ON",
    "color": {
        "r": 255,
        "g": 109,
        "b": 109
    },
    "effect": "None"
}

Availability

Topic: rpi-ws281x/alive

Response: 1 or 0