security

MQTT servers can be set up in a very permissive configuration, which makes the protocol easy to work with but leaves it vulnerable to mischief by anyone connected within the perimeter of the network.

This may not be a problem if you're just using MQTT for novelty and maybe to turn a lamp on and off. It's also not problematic if your network is perfectly secured from outsiders. However, if you are using MQTT for physical access control or important appliances such as heating and cooling, it is essential to set up a more secure system.

Every electronic device is potentially the weak link in the security of your home automation system. It is important to understand where things can go wrong, how to prevent problems, and what to do when a problem occurs.