I've recently installed my new hub bought a number of ZigBee sonoff sockets for lamps etc. My house currenly has a mix now of ZigBee via the hub and WiFi older smart devices. What I've noticed is that most of the time the WiFi and hub attached devices work about the same but about 20% of the time the hub attached ones are slower by a few seconds. Sometimes the socket furthest from the hub doesn't work at all.
Is this a coverage issue? I thought that the sockets would repeat making a mesh system so distance shouldn't be an issue? Is there a way I can measure the signal strength or even confirm that the sockets are repeated?
A bit underwhelmed so far especially as the WiFi devices have always worked.