homebridge-eveatmo/service/eveatmo-battery.js

Homebridge plugin which adds a Netatmo weatherstation as HomeKit device and tries to act like Elgato Eve Room/Weather

'use strict';

var homebridge;
var Characteristic;
var Perms;
var Formats;

module.exports = function(pHomebridge) {
  if (pHomebridge && !homebridge) {
    homebridge = pHomebridge;
    Characteristic = homebridge.hap.Characteristic;
    Perms = homebridge.hap.Perms;
    Formats = homebridge.hap.Formats;
  }

  class EveatmoBatteryService extends homebridge.hap.Service.Battery {
    constructor(accessory) {
      super(accessory.name + ' Battery');
      this.accessory = accessory;

      this.getCharacteristic(Characteristic.BatteryLevel)
        .setProps({
          perms: [
            Perms.READ,
            Perms.HIDDEN,
          ],
        })
        .on('get', this.getBatteryLevel.bind(this))
        .eventEnabled = true;
      this.getCharacteristic(Characteristic.StatusLowBattery)
        .setProps({
          perms: [
            Perms.READ,
            Perms.HIDDEN,
          ],
        })
        .on('get', this.getStatusLowBattery.bind(this))
        .eventEnabled = true;
      this.getCharacteristic(Characteristic.ChargingState)
        .setProps({
          perms: [
            Perms.READ,
            Perms.HIDDEN,
          ],
        })
        .on('get', this.getChargingState.bind(this));
    }

    getBatteryLevel(callback) {
      this.accessory.refreshData((err, data) => {
        callback(err, this.accessory.batteryPercent ? this.accessory.batteryPercent : 100);
      });
    }

    getStatusLowBattery(callback) {
      this.accessory.refreshData((err, data) => {
        callback(err, this.accessory.lowBattery ? Characteristic.StatusLowBattery.BATTERY_LEVEL_LOW : Characteristic.StatusLowBattery.BATTERY_LEVEL_NORMAL);
      });
    }

    getChargingState(callback) {
      callback(null, Characteristic.ChargingState.NOT_CHARGING);
    }

    updateCharacteristics() {
      this.getCharacteristic(Characteristic.BatteryLevel)
        .updateValue(this.accessory.batteryPercent);
      this.getCharacteristic(Characteristic.StatusLowBattery)
        .updateValue(this.accessory.lowBattery ? Characteristic.StatusLowBattery.BATTERY_LEVEL_LOW : Characteristic.StatusLowBattery.BATTERY_LEVEL_NORMAL);
    }
  }

  return EveatmoBatteryService;
};