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

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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

look for your interface
sudo iwconfig
look at your channels
sudo iwlist {interface} channel
turn off wifi
sudo iwconfig {interface} power off
set your desired channel
sudo iwconfig {interface} channel {channel, ex. "23"}
set your desired frequency
sudo iwconfig {interface} freq {frequency, ex. "5.00G"}
turn on wifi
sudo iwconfig {interface} power on

Answer 2

You can't do that. The channel is selected automatically in the 2.4 or 5GHz band because the channel depends on your router: The router selects a channel and your client simply uses it. There is no way for the client to tell the router "please switch to band 13".
The 2.4 and 5GHz bands are usually selected by the network name; your router should offer two WLAN names.