From: tnp@invalid.invalid   
      
   A power cut this a.m had my Pi zero W reconnecting to the  wrong wifi.   
      
   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   
      
   You probably can edit the files directly - mine were in   
   /etc/NetworkManager/system-connections, but it's safer to use nmcli tools   
      
      
   You can set a priority if you have more than one wifi SSID.   
      
   sudo nmcli c modify   connection.autoconnect-priority 1   
      
   You can also force it to use 5Ghz or 2.4Ghz or let it decide   
      
   sudo nmcli c modify  802-11-wireless.band "bg"   
      
   or   
      
   sudo nmcli c modify  802-11-wireless.band "a"   
      
      
   "bg" is 2.4GHz, "a" is 5GHz.   
      
   It may well be that bookworm has changed the implicit defaults in   
   network manager.   
      
   It is well worth dumping the connections with   
      
   sudo nmcli connection show    
      
   To work out what the connection names are, use   
      
   sudo nmcli c show   
      
   I think - but am not sure - that you can set more stuff through the   
   command line than through the GUI interface to network manager   
      
      
   --   
   “Those who can make you believe absurdities, can make you commit   
   atrocities.”   
      
   ― Voltaire, Questions sur les Miracles à M. Claparede, Professeur de   
   Théologie à Genève, par un Proposant: Ou Extrait de Diverses Lettres de   
   M. de Voltaire   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)