Changing Wi-Fi Channel

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Is there a way to force the WiModem232 Pro to use a specific Wi-Fi channel or access point MAC? My home network supports roaming with one SSID across multiple access points, and my WiModem seems to be stuck on a channel that is associated with a more distant AP with a weaker signal. I think this might be the cause of some performance issues I've been seeing.

I've tried using the AT*NS command to associate with a specific AP but the WiModem remains on the weaker channel.

Thanks!