How to force Wi-Fi adapter to use specific channel [closed]

Question

I am trying to force the Wi-Fi adapter to use a specific channel while connecting to the access point which supports both 2.4 GHz and 5 GHz (WPA authentication).

I am using the following configuration:

OS: Raspbian
Model: Raspberry Pi 2 Model B
Wi-Fi Adapter: Edimax EW-7811UTC
Driver: 8812au

I also tried with a different Wi-Fi adapter: Asus USB-N53 using driver rt2800.

Tried with iwconfig which is giving SET failed on device wlan0 ; Operation not supported.

Also tried wpa_supplicant.

What extra arguments need to be given to the wpa_cli or wpa_supplicant utility so that the Wi-Fi adapter will connect only to the specific band?

Answer 1

1. look for your interface

   sudo iwconfig
   

2. look at your channels

   sudo iwlist {interface} channel
   

3. turn off wifi

   sudo iwconfig {interface} power off
   

4. set your desired channel

   sudo iwconfig {interface} channel {channel, ex. "23"}
   

5. set your desired frequency

   sudo iwconfig {interface} freq {frequency, ex. "5.00G"}
   

6. turn on wifi

   sudo iwconfig {interface} power on