FWIW, I always felt that is the CLI could be used to make a configuration change, then (via a copy & paste), there was always less scope for making a mistake. With that in mind, here are some options…
When the 2.5 GHz card moves from mPCIe slot 1 to slot 3 (because the mSATA card must be in slot 1), then /etc/config/wireless needs to be edited as per all the various posts mentioned here and elsewhere…
The easiest way to acheive this (IMO), is to execute following command:
root@db-router:~# sed -i ‘/path/ s/01/03/g’ /etc/config/wireless
… to restart wireless networking with the new configuration (assuming the card is already in slot 3):
root@db-router:~# wifi
To be clear, this is a permanent change, and does not require a reboot. The sed command looks for lines containing ‘path’, and swaps ‘01’ for ‘03’.
I suggest you simply: a) execute the sed command as above, then b) immediately shut down the router and finally, c) move the card from slot 1 to 3. When you reboot (and wifi restarts), there should be no noticeable difference.
An alternative (better?) way may be to use UCI:
root@db-router:~# uci show wireless | grep path
root@db-router:~# uci set wireless.radio0.path=‘soc/soc:pcie-controller/pci0000:00/0000:00:03.0/0000:03:00.0’
root@db-router:~# uci commit
root@db-router:~# wifi
Again, no reboot required.
FYI: if you’ve pranged your wireless configuration, then the following commands may be helpful:
root@db-router:~# wifi detect > /etc/config/wireless
… and (these are commands that make changes to /etc/config/wireless via UCI):
root@db-router:~# uci show wireless
root@db-router:~# uci set uci set wireless.radio0.disabled=0
root@db-router:~# uci set wireless.@wifi-iface[0].ssid=MY_SSID
root@db-router:~# uci set wireless.@wifi-iface[0].key=MY_PASSWORD
root@db-router:~# uci set wireless.@wifi-iface[0].encryption=psk2+ccmp
root@db-router:~# uci commit
root@db-router:~# wifi
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