homebridge-rpiradio-light/index.js

A Homebridge plugin to control 433mhz radio

const RateLimiter = require('limiter').RateLimiter;

const rpi433    = require('rpi-433-v2'),
      rfEmitter = rpi433.emitter({
        pin:         7,                     //Send through GPIO 0 (or Physical PIN 11)
        pulseLength: 350,            //Send the code with a 350 pulse length
      });
let Service,
    Characteristic;

module.exports = function (homebridge) {
  Service        = homebridge.hap.Service;
  Characteristic = homebridge.hap.Characteristic;

  homebridge.registerAccessory('homebridge-rpiradio-light', '433Light', mhz433light);
};

function mhz433light(log, config) {
  this.log          = log;
  this.name         = config['name'];
  this.off_payload  = config['off_payload'];
  this.on_payload   = config['on_payload'];
  this.currentState = false;
  this.limiter      = new RateLimiter(1, 700); //limit requests to one per 200ms

  this.lockservice = new Service.Lightbulb(this.name);
  this.lockservice
      .getCharacteristic(Characteristic.On)
      .on('get', this.getState.bind(this))
      .on('set', this.setState.bind(this));
}

mhz433light.prototype.getState = function (callback) {
  this.log('current lock state is ' + this.currentState);
  callback(null, this.currentState);
};

mhz433light.prototype.setState = function (state, callback) {
  this.limiter.removeTokens(1, () => {
    this.log('Set state to ', state);

    rfEmitter.sendCode((state ? this.on_payload : this.off_payload), (error, stdout) => {
      if (error) {
        callback('error');
      } else {
        this.log('STDOUT: ' + stdout);
        this.log('Success ', (state ? 'on' : 'off'));
        this.currentState = state;
        callback(null);
      }
    });
  });
};

mhz433light.prototype.getServices = function () {
  return [this.lockservice];
};