Re: A bit more on Bookworm and WiFi problens

On 27/10/2024 at 15:37, The Natural Philosopher wrote:

A power cut this a.m had my Pi zero W reconnecting to the  wrong wifi.
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Which forced me to delve into the depths of network manager as evinced by nmcli. Network manager is the new way to manage networks, and like systemd, its all changed for the sake of it
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You probably can edit the files directly - mine were in /etc/NetworkManager/system-connections, but it's safer to use nmcli tools
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You can set a priority if you have more than one wifi SSID.
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sudo nmcli c modify <connection name>  connection.autoconnect-priority 1
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You can also force it to use 5Ghz or 2.4Ghz or let it decide
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sudo nmcli c modify <connection name> 802-11-wireless.band "bg"
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or
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sudo nmcli c modify <connection name> 802-11-wireless.band "a"
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"bg" is 2.4GHz, "a" is 5GHz.
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It may well be that bookworm has changed the implicit defaults in network manager.
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It is well worth dumping the connections with
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sudo nmcli connection show <connection name>
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To work out what the connection names are, use
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sudo nmcli c show
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I think - but am not sure - that you can set more stuff through the command line than through the GUI interface to network manager
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 Have you tried nmtui?