I have 2.4GHz-only APs but my Raspberry Pi 3B+ has dual band capability. I want to tell Ubuntu in its terminal to make sure nothing runs on 5.2Ghz.
I have searched far and wide locally and on the internet for a solution to this, and have come back with nothing.
SoC: Broadcom BCM2837B0 quad-core A53 (ARMv8) 64-bit @ 1.4GHz
GPU: Broadcom Videocore-IV
RAM: 1GB LPDDR2 SDRAM
Networking: 2.4GHz and 5GHz 802.11b/g/n/ac Wi-Fi
Bluetooth: Bluetooth 4.2, Bluetooth Low Energy (BLE)
Any ideas?
1 Answer
nmcli is the CLI tool to use here to control Network Manager. As per make sure your WiFi radio is on with nmcli r wifi on then find the name of your Pi's WiFi with nmcli d .
List the WiFi Access Points (WAPs) with nmcli d wifi list then connect with nmcli d wifi connect my_wifi password .
Since your WAPs are 2.4GHz, you won't select any 5 GHz WAP, and once you've connected to your 2.4 GHz WAP, it will stay connected.
wpa_supplicant allows you to specify frequencies restricted to the 2.4 GHz band only by adding a file /etc/wpa_supplicant.conf with a line including
freq_list=2412 2417 2422 2427 2432 2437 2442 2447 2452 2457 2462
provides GUI-based instructions if you've added a GUI to your server; shows the critical screen for WAP selection.
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