Hi Alzhao,
Yes a lot of configs have occurred. I did today manage to get relayd working once - however, I renamed the SSID and it broke - I was so close. So with that working once, everything I was trying to do all worked, so I think I need relayd to be able to have the bidirectional traffic.
As to the other question, I have a workshop ~120ft from my house, there is no Ethernet cabling to it, so I have to repeat the signal. Inside the workshop I have the Pi connecting wirelessly as it ~50ft from the MT300a (it a metal workshop so direct wireless is not an option).
Not sure this helps, but I have yet to get relayd to be solid in operation - I’ll do thru it again tomorrow and see if I can get closer.
thanks
andre