Visonic PowerMax MQTT interface

To be used with Home Assistant.

Tested on a Visonic PowerMax Complete.

Implemented using protocol description found at: https://www.domoticaforum.eu/viewtopic.php?f=68&t=6581&sid=1acd634aa4f71212ec7d6d58c91751b2

Usage

Connect the PowerMax to a USB RS232 converter, e.g.: https://www.electrokit.com/usbseriellomvandlare-bbch340t.53189

See https://www.domoticz.com/forum/viewtopic.php?f=38&t=11134 for more information on how to connect the pins.

Docker image: https://hub.docker.com/r/robinwallberg/powermax-mqtt/

Environment variables

• USER_CODE - The user code to use for arming/disarming
• SERIAL_PORT - Serial port to use, default: /dev/ttyUSB0
• MOTION_TIMEOUT - Timeout in seconds before resetting a PIR motion event, default: 120
• MQTT_URL - MQTT broker URL, e.g. mqtt://192.168.1.123
• MQTT_TOPIC - MQTT Topic to use, default: PowerMax. Will publish zone events to PowerMax/(1-30).

Example of a zone event published to PowerMax/3:

{
  "id": 3,
  "enrolled": true,
  "open": false,
  "bypassed": false,
  "lowBattery": false,
  "motion": false,
  "tamper": false
}

Example of a Home Assistant binary MQTT sensor for zone events:

- platform: mqtt
  name: "Front Door"
  state_topic: "PowerMax/3"
  device_class: door
  payload_on: true
  payload_off: false
  value_template: '{{ value_json.open }}'
- platform: mqtt
  name: "Front Door Battery"
  state_topic: "PowerMax/3"
  device_class: battery
  payload_on: true
  payload_off: false
  value_template: '{{ value_json.lowBattery }}'

Home Assistant MQTT Alarm Panel:

alarm_control_panel:
  - platform: mqtt
    name: Larm
    state_topic: "PowerMax"
    command_topic: "PowerMax/set"