The How to use MQTT Article lists the publish_topic/system: sends the {“state”:”started”} message when the controller boots. I’ve never seen this happen!
However, I’ve recognized that the publish_topic/availability: sends the message {“offline”} and thereafter the message {“online”} when the controller boots. Please let me know, if this is expected in regards to OpenSprinkler Unified Firmware 2.2.1(0).