I have quite a few reprogrammed (OpenBK) sockets, switches, thermometers and door open sensors at the moment - I have encountered a problem in them regarding not being able to access a correctly configured second WiFi network (as a backup):
1. The primary WiFi always connects - I have two separate SSIDs on two routers (one on the first floor and the other in the basement with a different SSID) - I get connection to both as the network is set as primary in the configuration.
2. The backup WiFi never connects (as the primary is out of range) - I also checked swapping the places of both networks in the configuration, but the symptom is the same - it only connects on the primary, not on the backup.