wonder if anyone has ideas on this one ....

power up the avalon nano 3
on phone change wifi to Heater_nano **
go to app , click add equipment
asks for ip
look at nano 3 , ip is 192.168.168.168
enter this in app and spins for about a minute saying connecting
but never does

I have 3 second hand nanos here , all doing identical thing

help :-)