WLAN debian autoreconnect (ping method)

README WIFI reconnect.md

I had problems with my raspberry pi disconnecting and never reconnecting to a WiFi-network. There are already several different solutions

• http://raspberrypi.stackexchange.com/questions/4120/how-to-automatically-reconnect-wifi
• http://www.forum-raspberrypi.de/Thread-wlan-reconnect-nach-verbindungsabbruch?page=2

This is mine:

1. vim /usr/local/sbin/wlan-reconnect
2. chmod +x /usr/local/sbin/wlan-reconnect.sh
3. vim /etc/systemd/system/wlan-reconnect.timer
4. vim /etc/systemd/system/wlan-reconnect.service
5. systemctl daemon-reload
6. systemctl enable wlan-reconnect.timer
7. systemctl start wlan-reconnect.timer

wlan-reconnect.service

[Unit]
Description=Restart WLAN if down
 
[Service]
Type=simple
ExecStart=/usr/local/sbin/wlan-reconnect.sh

wlan-reconnect.sh

#!/bin/bash
ROUTERIP=192.168.50.253

ping -c4 ${ROUTERIP} > /dev/null

if [ $? != 0 ]
then
    echo "WiFi seems down, restarting."
    #shutdown -r 0
    ifdown --force wlan0
    /etc/init.d/networking stop
    killall wpa_supplicant
    /etc/init.d/networking start
    ifup wlan0
    echo "WiFi should be up again."
    sleep 40
    ping -c4 ${ROUTERIP} > /dev/null
    if [ $? != 0 ]
    then
        shutdown -r 0
    else
        echo "WiFi up again."i
        exit 0
    fi
else
    echo "WiFi ok"
    exit 0
fi

wlan-reconnect.timer

[Unit]
Description=Restart WLAN if down
 
[Timer]
OnCalendar=*-*-* *:*:00
Persistent=false
 
[Install]
WantedBy=timers.target