I was wondering how often a MQTT server will transmit? I do not really want to have the whole house full of ESP8266 devices that are transmitting all the time. Not referring to transmits that I initiate, but network overhead. The code in the ESP8266 devices will only transmit a couple of times per day, but I was wondering if there is network overhead that will cause all connected wifi devices to permanently transmit? Maybe replying to broadcast messages, keep alive packets of other?
Is there a way I can measure this? Maybe print something out on debug port each time wifi transmits?