sudo npm install -g homebridge-mqtt-temperature

{
  "bridge": {
    "name": "HomeBridge",
    "username": "CC:33:3B:D3:CE:32",
    "port": 51826,
    "pin": "321-45-123"
  },

  "description": "",

  "accessories": [
    {
      "accessory": "mqtt-temperature",
      "name": "Living Room Temperature",
      "url": "mqtt://localhost",
      "topic": "home/livingroom/temperature/value",
      "batt_topic": "home/livingroom/temperature/battery",
      "charge_topic": "home/livingroom/temperature/charge",
      "batt_low_perc": "33",
      "username": "username",
      "password": "password",
      "maxTemperature": "75",
      "minTemperature": "-25",
      "serial": "HMT-34932B"
    }
  ],

  "platforms": []
}