I’ve got a couple of existing lamps and would like to switch them using Zigbee.
Ideal requirements:
Small, so it can be hidden e.g. behind the wall switch or so.
Supports ZHA 1.2 or Zigbee 3.0, so it can also relay signals from e.g. sensors. AFAIK the Zigbee Light Link protocol can only relay ZLL signals, which doesn’t support sensors.
Look at the Xiaomi ZigBee switch it is a socket type one so not sure if it is exactly what you want but it’s small, has physical control and combine it with zigbee2mqtt and you have a pretty cool smart switch.
When I have time, I want to add them one by one to my Zigbee network based on the ConBee stick and just try out if they relay ZHA signals (e.g. Xiaomi temperature sensor) and how far.
Yes, actually I found that all wired devices that I own repeat signals just fine.
I was a little worried about ZLL vs. ZHA, but I didn’t see any difference, actually.
I’m using sockets from IKEA, Osram, Innr, Bitron, and Xiaomi, a bulb from Osram, a dimmer from Paulmann, and in-wall relays from Xiaomi and Bitron.
Bottom line: Don’t worry too much. You might need a couple though to build a dense mesh network, especially if your home is large.