Problem connecting to specific wifi network

[JamesWatt]

Hi,

I have ubuntu installed, this version:

Code:

ubuntu@pine64:~$ sudo uname -a
Linux pine64 3.10.104-2-pine64-longsleep #113 SMP PREEMPT Thu Dec 15 21:46:07 CET 2016 aarch64 aarch64 aarch64 GNU/Linux

I have 2 wifi networks at home as in some rooms wifi recption is poor.
I'm running the primary wifi on main internet router near the living room and a secondary wifi on an access point in one of the rooms with bad wifi.
I configured wifi in the living room on the primary wifi network, no problems at all wifi is working. 
Then moved the pine to another room where it should use the secondary wifi. 
Reconfigured wifi ssid (that is the only difference between both), but the pine won't connect.

I am sure both wifi networks work as other wifi clients (like phone, laptops, etc) have no problem connecting to either of them.

It's just the pine that won't connect to the secondary wifi.

Any suggestions on how to debug?

Thanks, 

Eric