I have an IoT device (weather station) which is not connecting to my router any longer (it worked properly for five months, but no more). I've attempted a reset to factory defaults and restarted it several times, but no joy. The manufacturer does not know how to support MikroTik but states that the device will only connect on 2.4GHz and does not support 5GHz; they will not warranty their device until I can demonstrate that it is attempting to connect on the proper band.
I've tried going into the "Interfaces" tab and disabling one of the WLAN interfaces at a time, but it appears that no matter which one I disable the other defaults back to 5GHz. I'm still getting acquainted with RouterOS and haven't figured out how to get into it in any more depth. Some assistance would be appreciated. At present I have it set up for dual-band AP (same SSID, both bands) with an additional SSID for a guest network. Thanks for any help.