We are looking for a way to forge the RPi 4 to 2.4Ghz band only (bg only, no a).
We tried using the NM connection setup for band and channels but it does not seem to make any difference - the device keeps connecting to 5Ghz channels. We also tried configuring the NM connection to specific BSSID but it appears NM or wpa_supplicant ignores this as well. We’re not sure why this is ignored.
Note that the SSID we are testing with has BSSID on both 2.4 and 5Ghz - the signal strength on 2.4Ghz is stronger and we set the band=bg in the NM connection profile under the [wifi] section.
Any ideas or advice on how to achieve this?