I have just taken delivery of my UK kit,
Does anyone suggest which of the ZWave or Zigbee USBs is best used with the USB extension cable provided? Or just plug them both into the small Hub?
The Hubitat Hub is located only 2 ft from an additional WiFI AP currently set to Channel 11.
The main Modem Router is downstairs and set to Channel 1 (2.4GHz) and Channel 36 (5GHz).
Hubitat Hub has allocated Zigbee Channel 16.
Should I change this before embarking on my migration?
Zigbee channel solely depends on what wifi channels are in use (wifi interference) and any other channels currently being used by other zigbee hubs like Hue (zigbee interference).
Pick the one with the least interference. If you are using Wifi on 1 & 11, I would pick something in the middle like 18. But 16 should be fine too, unless there is a lot of other channel 6 interference from neighbors, etc.
Be careful putting any hub right next to a Wifi AP... You can get a lot of interference from the AP - especially on zigbee. 3 ft apart is often considered minimum, but I would never put mine closer than 10 ft. Right now my HE hub is in the middle of the house, connected to the rest of the network via a powerline adapter - far from my APs.