After many many attempts to connect door contacts, leak sensors and motion detector to the Sky Protect App, I've found a way of connecting them without problems.
The instructions say you must connect to a 2.4 GHz wifi, the trouble is the Sky Router (Hub) defaults to Synchronise 2.4 GHz and 5 GHz Wifi settings so its pot luck if your mobile device connects to the 2.4 GHz wifi.
So to overcome this uncheck the 'Synchronise 2.4 GHz and 5 GHz Settings', rename the 'Name (SSID):' to someting like XXX 2.4. Press Apply button, after this has taken affect select the separate 2.4 GHz Wifi on your mobile device and you should now be able to connect the accessories.
