This is a simple bash script that monitors the Raspberry Pi for wireless connectivity. If the Raspberry Pi has lost its Wi-Fi connection, this script will attempt to reconnect.
This script assumes that the local address of your wireless router is 192.168.1.1. If your router has a different IP address, please replace that in this script.
Create directory
Create a directory called crons under the home directory and cd
to it.
mkdir ~/crons
cd ~/crons
Create bash script
Create script wifi_connect.sh under ~/crons
and add these lines as contents:
# Ping to the router
ping -c2 192.168.1.1 > /dev/null
# If the return code from ping ($?) is not 0 (meaning there was an error)
if [ $? != 0 ]; then
# Restart the wireless interface
ifdown --force wlan0
sleep 5
ifup wlan0
echo "wlan0 reconnected at `date`"
fi
Chmod it to 755
chmod 755 ~/crons/wifi_reconnect.sh
Add crontab entry for every 12 hours
Add cron entry to run this script every 12 hours.
crontab -e
Add this line:
0 */12 * * * sudo /home/pi/crons/wifi_reconnect.sh >> /tmp/wifi_reconnect.log
Save and exit by presing Ctrl+X, if you're using Nano editor.
That's all! Every 12 hours, this script will check if your wireless interface wl0 is connected to the router. If it is not connected, it will restart wlan0.
I have been using this script since 2012 and it has always worked great. Hopefully, it should work generically across all Raspberry Pi computer versions.
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If you have any questions, please contact me at arulbOsutkNiqlzziyties@gNqmaizl.bkcom. You can also post questions in our Facebook group. Thank you.