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tools:raspbian [2023/10/04 20:33]
darron [WiFi problems] 		tools:raspbian [2024/05/16 11:52] (current)
darron [Upgrade]
Line 271: Line 271:
 ===WiFi problems=== ===WiFi problems===
  
-At least on one setup the WiFI fails to start during boot. It seems that the interface+==Hotplug== 
 + 
 +At least on one setup the WiFi fails to start during boot. It seems that the interface
 has no name as yet or is renamed to something else then renamed back to wlan0 but after has no name as yet or is renamed to something else then renamed back to wlan0 but after
 wpa_supplicant runs which results in network failure. wpa_supplicant runs which results in network failure.
Line 323: Line 325:
 </code> </code>
  
 +==Keep alive==
 +
 +Pi4 WiFi can both disconnect with wpa_supplicant still running or crash.
 +
 +In the former case we can reconnect but in the latter a reboot is required.
 +
 +<code>
 +#! /bin/bash
 +
 +check() {
 +        LOSS=`ping -c 3 -i 1 192.168.0.1 | awk 'match($0, /[0-9]+%/) { print substr($0, RSTART, RLENGTH) }'`
 +}
 +while test 1; do
 +        sleep 30
 +        check
 +        if test "$LOSS" = "100%"; then
 +                ifdown wlan0 1>/dev/mull 2>/dev/null
 +                ifup   wlan0 1>/dev/null 2>/dev/null
 +                sleep 5
 +                check
 +                if test "$LOSS" = "100%"; then
 +                        reboot
 +                fi
 +        fi
 +done
 +</code>
 +
 +Change the IP address to that of your access point or modem.
 === Upgrade === === Upgrade ===
  
Line 344: Line 374:
  
 EG. EG.
 +
 +to bullseye from buster
  
 <code> <code>
 sed -i 's/buster/bullseye/g' /etc/apt/sources.list sed -i 's/buster/bullseye/g' /etc/apt/sources.list
 </code> </code>
 +
 +or edit for from bullseye to bookworm
 +<code>
 +deb http://deb.debian.org/debian bookworm main contrib non-free non-free-firmware
 +deb http://deb.debian.org/debian-security/ bookworm-security main contrib non-free non-free-firmware
 +deb http://deb.debian.org/debian bookworm-updates main contrib non-free non-free-firmware
 +</code>
 +
 +If keys need importing (if import fails try again, and again)
 +
 +<code>
 +apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 0E98404D386FA1D9
 +apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 6ED0E7B82643E131
 +apt-key adv --recv-keys --keyserver keyserver.ubuntu.com F8D2585B8783D481
 +apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 54404762BBB6E853
 +apt-key adv --recv-keys --keyserver keyserver.ubuntu.com BDE6D2B9216EC7A8
 +</code>
 +
  
 Update Update
Line 358: Line 408:
  
 Change RPi sources list Change RPi sources list
 +
  
 <code> <code>
Line 363: Line 414:
 </code> </code>
  
 +or
 +
 +<code>
 +sed -i 's/bullseye/bookworm/g' /etc/apt/sources.list.d/raspi.list
 +</code>
 Update Update