Several home automation systems -like Home Assistant- support MQTT discovery. Leveraging this functionality in the PLC programming will automatically provision devices in the supported home automation system.
ℹ️ Function blocks supporting MQTT discovery are marked with a 
Supported function blocks have a InitMqttDiscovery method. The method needs a FB_PLC_MQTT_DISCOVERY_DEVICE instance to work.
In order to support MQTT discovery the 'PRO_JSON' library is used to generate the required json objects. This library is configuration sensitive. Amongst others it required the projectName in its variables to function correctly:
