# Integrate Home Assistant Home Assistant provide the [MQTT integration](https://www.home-assistant.io/integrations/mqtt/) and through this integration it is possible to exploit and manage the messages published by OpenMQTTGateway. Once this integration on home assistant is configured with the same MQTT broker, it is possible to create devices manually or through the autodiscovery function. ## Auto discovery From Home Assistant site > The discovery of MQTT devices will enable one to use MQTT devices with only minimal configuration effort on the side of Home Assistant. The configuration is done on the device itself and the topic used by the device. On OpenMQTTGateway the Home Assistant discovery is enabled by default on all binaries and platformio configurations except for UNO. With Arduino IDE please read the [advanced configuration section](../upload/advanced-configuration#auto-discovery) of the documentation. Here are a few tips for activating discovery on Home Assistant, but for detailed configuration please refer to the Home Assistant website. Enable discovery on your MQTT integration in HASS. ![](../img/OpenMQTTGateway-Configuration-Home-Assistant-Discovery-Integration.png) The gateway will need an MQTT username and password, you have to create a new user(recommended) into Home Assistant->Configuration->Users (available in admin mode) or use an existing username/pwd combination (not recommended). This user doesn't need to be an administrator. ![](../img/OpenMQTTGateway-Configuration-Home-Assistant.png) ::: warning Note The max size of the username is 30 and 60 for the password. ::: OMG will use the auto discovery functionality of home assistant to create gateway and sensors into your HASS instance automaticaly. ![](../img/OpenMQTTGateway_auto_discovery_Gateway_Home_Assistant.gif) ![](../img/OpenMQTTGateway_auto_discovery_BLE_Sensor_Home_Assistant.gif) ![](../img/OpenMQTTGateway_Home_Assistant_MQTT_discovery.png) ## MQTT Device Trigger and RF With OpenMQTTGateway [configured to receive RF signals](./setitup/rf.html) the messages are transmitted as indicated by [RCSwitch based gateway](./use/rf.html#rcswitch-based-gateway), so it is possible to receive a pulse every time the sensor discover a signal. With autodiscovery enabled, HomeAssistant will discover a [MQTT Device Trigger](https://www.home-assistant.io/integrations/device_trigger.mqtt/) identified by the value field given in the mqtt argument. ## Manual integration examples From @123, @finity, @denniz03, @jrockstad, @anarchking, @dkluivingh ### Door sensor ```yaml binary_sensor: - platform: mqtt name: "test" state_topic: "home/OpenMQTTGateway/433toMQTT" value_template: >- {% if value_json.value == '7821834' %} {{'ON'}} {% elif value_json.value == '7821838' %} {{'OFF'}} {% else %} {{states('binary_sensor.test') | upper}} {% endif %} qos: 0 device_class: opening ``` ```yaml binary_sensor: - platform: mqtt name: doorbell state_topic: 'home/OpenMQTTGateway/SRFBtoMQTT' #value_template: "{{ value_json.raw }}" value_template: >- {% if value_json.value == '14163857' %} {{'ON'}} {% else %} {{states('binary_sensor.doorbell') | upper}} {% endif %} off_delay: 30 device_class: 'sound' - binary_sensor: platform: mqtt name: light_back_sensor state_topic: 'home/OpenMQTTGateway/SRFBtoMQTT' #value_template: '{{ value_jason.value }}' value_template: >- {% if value_json.value == '1213858' %} {{'ON'}} {% else %} {{states('binary_sensor.light_back_sensor') | upper}} {% endif %} off_delay: 5 - binary_sensor: platform: mqtt name: rf_outlet_sensor state_topic: 'home/OpenMQTTGateway/SRFBtoMQTT' value_template: >- {% if value_json.value == '16766303' %} {{'ON'}} {% else %} {{states('binary_sensor.rf_outlet_sensor') | upper}} {% endif %} ``` ### Motion sensor ```yaml binary_sensor: - platform: mqtt name: "Bewegung_Schlafzimmer" #device_class: motion state_topic: "home/OpenMQTTGateway1/HCSR501toMQTT" value_template: '{{ value_json["presence"] }}' payload_on: "true" payload_off: "false" ``` ### Switches ```yaml #switches switch: - platform: mqtt name: Plug1 state_topic: "home/OpenMQTTGateway/SRFBtoMQTT" command_topic: "home/OpenMQTTGateway/commands/MQTTtoSRFB" value_template: "{{ value_json.value }}" payload_on: '{"value":4546575}' payload_off: '{"value":4546572}' state_on: 4546575 state_off: 4546572 qos: "0" retain: true ``` ### Mijia Thermometer BLE ```yaml Sensor: - platform: mqtt state_topic: 'home/OpenMQTTGateway/BTtoMQTT/AAAAAAAAAAAA' # MQTT topic, check MQTT messages; replace AA... with id (BLE MAC) of your device name: "mijia_thermometer_temperature" unit_of_measurement: '°C' value_template: '{{ value_json.tem | is_defined }}' expire_after: 21600 # 6 hours - platform: mqtt state_topic: 'home/OpenMQTTGateway/BTtoMQTT/AAAAAAAAAAAA' name: "mijia_thermometer_humidity" unit_of_measurement: '%' value_template: '{{ value_json.hum | is_defined }}' expire_after: 21600 # 6 hours - platform: mqtt state_topic: 'home/OpenMQTTGateway/BTtoMQTT/AAAAAAAAAAAA' name: "mijia_thermometer_battery" unit_of_measurement: '%' value_template: '{{ value_json.batt | is_defined }}' expire_after: 21600 # 6 hours ``` ### Xiaomi Mi Scale V2 BLE (XMTZC05HM) ```yaml sensor: - platform: mqtt name: "Weight" state_topic: "home/OpenMQTTGateway/BTtoMQTT/AAAAAAAAAAAA" # replace your MQTT topic here value_template: '{{ value_json["weight"] }}' unit_of_measurement: "kg" icon: mdi:weight-kilogram - platform: mqtt name: "Impedance" state_topic: "home/OpenMQTTGateway/BTtoMQTT/AAAAAAAAAAAA" # replace your MQTT topic here also value_template: '{{ value_json["impedance"] }}' unit_of_measurement: "Ohm" icon: mdi:omega - platform: template sensors: body_mass_index: friendly_name: 'Body Mass Index' value_template: >- {% set HEIGHT = (1.76)|float %} # replace your height in meters {% set WEIGHT = states('sensor.xmtzc05hm_weight')|float %} {{- (WEIGHT/(HEIGHT*HEIGHT))|float|round(1) -}} icon_template: > {{ 'mdi:human' }} ``` ### MQTT Room Presence The publication into presence topic needs to be activated [here is the command](../use/ble.md) ```yaml sensor: - platform: mqtt_room device_id: XX:XX:XX:XX:XX:XX #Mac Address of device wanting to track name: you_are_in # home assistant will show a sensor named (you are in) with its value being the name you gave the gateway state_topic: "home/presence" #timeout: #away_timeout: ``` ### Temperature sensor ```yaml sensor: - platform: mqtt name: outdoor temp state_topic: "home/OpenMQTTGateway/433toMQTT" unit_of_measurement: '°C' value_template: > {% if value_json is defined and value_json.sensor == 125 %} {{ value_json.tempc }} {% else %} {{ states('sensor.outdoor_temp') }} {% endif %} ```