I just got mine yesterday and set it up.
First I tried with my old android table, wouldn't connect. When searching for a pairing it auto went to search 5g.
So I unplugged it and tried to connect with my newer Samsung fe21 that gives me 2 options. To log into the 2.4 GHz or the 5g....so chose the 2.4 and its working amazingly.
Good luck.
Waiting for the humidity one coming tomorrow