@Jcbolive At end I had to get older omada device to make the connection. I am not sure what the issue is with the new AP points The "older" one that made it work for me....

I found this in my log file on the omada controller, perhaps this could help somebody [Failed] xx-xx-xx-xx-xx-xx failed to connected to xx-xx-xx-xx-xx-xx with SSID "iot" on channel 10 because WPA...

@Family_AM Hi, this was one of my first things i tried, I used extender to create new SID and the sonoff device connected and worked correctly, i then shut downed the extender and rename the SID on...

@Family_AM Hi, thank for the reply, i tried this setting on channel 1...13 and not one of them allowed the stupid iot device to connect. perhaps i changed the wrong setting ?

@KimcheeGUN I enabled that setting based on the feedback from others. it was disabled by default and that did not work.

I have tried those settings also. The devices are about 1 meter away, on the same table for testing. Nothing seems to work.