433 Mhz Dimmable LED MQTT (Homebridge) Controller

This is for an outdoor string light LED controller, but I'm sure others exist. The remote is running on 433MHz and supports brightness levels. The remote has the buttons on/off/brightness up/brightness down/25%/50%/75%/100%. This only uses the on/off and specific brightness levels.

Requirements

• 433utils
• wiringPi
• 433Mhz receiver and transmitter
• nodejs
• MQTT broker

Setup

1. Follow the instructions for setting up the 433Mhz modules. Receiver goes to WiringPi's 2 and sender goes to wiringPis 0. Use 5V & GND from RPi. For the receiver, use the pin closest to ground.
2. Collect the codes from RFSniffer in 433Utils. Put those codes into config/config.js. They'll just look something like 2484245

• Run using nodejs mqtt.js --codesend /path/to/codesend --mqttHost mqtt-broker.local editing the options to point to your codesend binary and your MQTT broker

Docker

1. Clone this repo
2. Follow the first step above related to wiring your pi
3. docker-compose up sniffer and record the values of the button presses
4. Edit config/config.js with these values
5. Copy .env-sample to .env and edit MQTTHOST value
6. docker-compose up -d server

Homebridge Setup

Install homebridge-mqttthing

Add these accessories in config.json, editing url to point to your MQTT broker. Change the names of the light as desired.

{
	"accessory": "mqttthing",
	"type": "lightbulb",
	"name": "Backyard Lights",
	"url": "mqtt://o.xrho.com",
	"topics": {
		"getOn": "backyard/getOn",
		"setOn": "backyard/setOn",
		"getBrightness": "backyard/getBrightness",
		"setBrightness": "backyard/setBrightness"
	}
},