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RPi 3B+ PRETTY_NAME="Raspbian GNU/Linux 11 (bullseye)"
At /etc/wpa_supplicant/wpa_supplicant.conf I have some network definitions like:

network={
        ssid="SID 1"
        psk="###"
        key_mgmt=WPA-PSK
        priority=1
}

network={
        ssid="SID 0"
        psk="###"
        key_mgmt=WPA-PSK
        priority=0
}

network={
        ssid="SID 2"
        psk="###"
        key_mgmt=WPA-PSK
        priority=2

Turning on the RPi it uses "SID 2" because its priority=2.
When "SID 2" loses internet I want connection switch to other network with internet.
It doesn't happen automatically. It still keeps connected to SID 2 without internet connection. How to perform that?

1 Answer 1

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wpa_supplicant knows nothing about internet.

It will only select the highest priority or strongest WiFi signal.

You will have to write some code to detect internet loss and to switch networks.

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  • wpa_supplicant.conf was mentioned as a reference. I understand it has nothing to do with internet connection. Jul 16, 2022 at 15:50
  • Milliways, can you expand your answer on the side of "write some code"? I am curious on what could be done on that front. Apr 12, 2023 at 11:13

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