Right, after much experimentation I have the printer working on WiFi, but only via reconfiguration through temporary Ethernet. It is showing in the HH5b as a device, connected via Ethernet. This, I believe is the problem being reported in this thread;
https://community.bt.com/t5/Other-Br...5/td-p/1110112
The chosen encryption is WPA2 Mixed on the printer. The device will probably work until the DHCP table is refreshed (it has been reset with the whole HH5b as was the printer). This is purely because WPA2 is the default setting on the HH5b, another good reason is the security is stronger.
I have taken these steps;
Configure printer from internal web page instead of on-board controls (may be impossible for certain printers/drivers, might be possible via USB if no Ethernet) I used the Ethernet interface for this via a Homeplug (if you have them you could move it temporarily from your STB or other device if you have one), you could use a long Ethernet cable or bring the printer to the HomeHub.
Static IP on the printer (advisable, shouldn't be necessary but could be helpful to many in a similar position, for some printers or drivers this may not be possible).
The
SSIDs for the two-bands need to be de-synced. Here is my first issue. This should either be a pre-shipped state for the HH4/5 or the firmware should be fixed so that SSID sync WORKS. The only reason I can see for this is that the card showing the SSID and WPK is simplified for numpties (who will not get or be helped past this stage by BT). Surely it is possible to show two SSIDs on the card and advise customers to connect to the 5GHz one if they can see both on the device they are connecting? I changed the SSID on the HH4a's 5GHz channel as when it was installed I had no 5GHz devices.
WPS is disabled on the HH5 - this is my second issue. The device ships with WPS enabled, even though the WPS system is inherently more insecure than even using WPA over WPA2. This feature should ship DISABLED unless it is improved and can be implemented via firmware update.
Smart Setup is disabled. This is advised if non-browser devices are connected to the LAN/WLAN. Again, this should be the default setting and enabled only if the home user wants some basic security controls.
SmartWireless is disabled. I have used inSSIDer to scan for the optimal channel based on my current environment. I have fixed the channel in the Hub for the 2.4GHz channel and made the corresponding setting on the printer (again, may not be possible for every device). I have left it enabled on the 5GHz channel, not that I can see any adjacent network signals.
Although I have set static IPs on two devices, I have not currently removed them from the DHCP lease pool. This was the case on the HH4a, I am leaving the default setting unchanged for now but may change if I lose the connection within 24 hours.
I have also used the b/g/n setting at 144mbps as the 300mbps setting was not available on the HH4a. This leads me to suspect that the hardware is different in the 5b to the 4a, 4b and 5a - I think, from what I can see on Wikipedia.
I need to reconnect two other wireless devices now I have changed the SSID, but there were no issues connecting those to the default SSID.
I have completed Port Forwarding (3074) for XBL on the XBox device ID now it is showing in the devices list (it is slow updating, in the last few minutes the printer has disappeared and is still not showing on wireless). This step was not required on the HH4a, there is a setting called 'Extended uPnP security' on the HH5b which I don't recall it being there on the HH4a (both uPnP and this setting are enabled).
