homebridge-smartsystem/accessories/dimmer.ts

SmartServer (Proxy Websockets to TCP sockets, Smappee MQTT, Duotecno IP Nodes, Homekit interface)

import { Accessory } from "./accessory";
import { Unit } from "../duotecno/protocol";
import { API } from "homebridge";
import { log } from "../duotecno/logger";

// Johan Coppieters Jan 2019
//
// Dimmer
// - a LightBulb to homekit, so a "light"
//


export class Dimmer extends Accessory {
  currValue: number;
  preventSetPower: boolean;
  waitingSetPower: boolean;

  constructor(homebridge: API, unit: Unit) {
    super(homebridge, unit);
    this.currValue = 0;
    this.preventSetPower = false;
    this.waitingSetPower = false;
  }

  getAccessoryServices() {
    const lightbulbService = this.makeService(this.homebridge.Service.Lightbulb);

    lightbulbService
      .getCharacteristic(this.homebridge.Characteristic.On)
        .on('get', this.getState.bind(this))
        .on('set', this.setPower.bind(this))

    lightbulbService
      .getCharacteristic(this.homebridge.Characteristic.Brightness)
        .on('get', this.getBrightness.bind(this))
        .on('set', this.setBrightness.bind(this))

    return [lightbulbService];
  }

  getBrightness(next) {
    if (this.unit) {
      this.unit.reqState(unit => { 
        next(null, unit.value);
        log("accessory", "getBrightness was called for " + this.unit.node.getName() + " - " + this.unit.getName() + " -> " + this.unit.value);
      }).catch(err => next(err));
    } else {
      next( new Error("accessory - getState needs to be overridden if no unit is provided.") );
    }
  }

  setPower(powerOn, next) {
    this.waitingSetPower = true;
    log("accessory", "setPower: *** waiting *** " + powerOn);
    setTimeout( () => {
      if (!this.preventSetPower) {
        log("accessory", "setPower: " + powerOn);
        this.unit.setState(powerOn)
          .then(() => next())
          .catch(err => next(err))
      } else {
        this.preventSetPower = false;
        next();
      }
      this.waitingSetPower = false;
    }, 900);
  }

  setBrightness(value, next) {
    this.currValue = value;

    // crush set on/off requests, bug in homekit / homebridge
    if (this.waitingSetPower) {
      this.preventSetPower = true;
      log("accessory", "setBrightness -> setPower: *** cancelled ***");
    } 
    
    log("accessory", "setBrightness " + value);

    this.unit.setState(value)
      .then(() => next())
      .catch(err => next(err))
  }

  updateState() {
    this.me.getCharacteristic(this.homebridge.Characteristic.Brightness).updateValue(this.unit.value);
    // log("accessory", "Received status change -> update accessory -> " + this.unit.getName() + " -> Brightness = " + this.unit.value);
  }

}