Which channel for the wifi network should I choose if the air is full?

Question

Android

Hello everyone
, I will attach pictures that show the situation with the ether at different points in the apartment.

My network is TP-LINK333.

Tell me correctly that I chose channel 10. I proceeded from the fact that the nearest network is channel 3 from me, and even the signal is 10 dBm lower

. And the second question, can I expand the network to 40 MHz on channel 10? Or is it better to change channels for 40 MHz?

spoiler

Answer 1

I understand that for most this is counter-intuitive, but it would be optimal to choose the 4th channel with this distribution.
You can check it out - one day work on the 10th channel, and the other day on the 4th, compare the sensations.
A detailed explanation in the article: https://habr.com/en/post/506812/
PS Well, if not the 4th, then the 11th, but definitely not the 10th.

Answer 2

Yes, OK. try 20/40 see what happens