I have just changed from a Home Hub 3 to a Home Hub 4 and have a LightWaveRF wi-fi link (controls home lighting etc) connected via ethernet cable.
When using an i-Pad to operate the system, it works fine but I get "communication error with wi-fi link, no reply from wi-fi link" message returned to the i-Pad. On the Home Hub 3, I had the correct "receipt number" message returned to the i-Pad !
In the "home network" settings of the HH4 it lists the LightWave device as "unknown" but the Mac number and IP address are correct. Is this something to do with Port Forwarding or something ?