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--- linux:raspberry:raspbian:troubleshooting [2015/04/06 22:30] – created lunetikk
+++ linux:raspberry:raspbian:troubleshooting [2020/01/15 12:01] (current) – lunetikk
@@ Line 1: / Line 1: @@
 ===== Raspberry Troubleshooting =====
-==== WLAN0 is loosing the connection ====
+==== WLAN0 is losing the connection ====
 \\
 After a while the raspberry loses the network connection via WLAN0 \\
@@ Line 15: / Line 15: @@
 <code># Disable power saving
 options 8192cu rtw_power_mgnt=0 rtw_enusbss=1 rtw_ips_mode=1</code>
+Third (optional): Create a cronjob with a script to check the connection and restart if wlan0 is turned off -> [[https://github.com/mharizanov/WiFi_Check/blob/master/WiFi_Check|Github WiFi_Check]]
+<code bash WiFi_Check>#!/bin/bash
+##################################################################
+# A Project of TNET Services, Inc
+#
+# Title: WiFi_Check
+# Author: Kevin Reed (Dweeber)
+# [email protected]
+# Project: Raspberry Pi Stuff
+#
+# Copyright: Copyright (c) 2012 Kevin Reed <[email protected]>
+# https://github.com/dweeber/WiFi_Check
+#
+# Purpose:
+#
+# Script checks to see if WiFi has a network IP and if not
+# restart WiFi
+#
+# Uses a lock file which prevents the script from running more
+# than one at a time. If lockfile is old, it removes it
+#
+# Instructions:
+#
+# o Install where you want to run it from like /usr/local/bin
+# o chmod 0755 /usr/local/bin/WiFi_Check
+# o Add to crontab
+#
+# Run Every 5 mins - Seems like ever min is over kill unless
+# this is a very common problem. If once a min change */5 to *
+# once every 2 mins */5 to */2 ...
+#
+# */5 * * * * /usr/local/bin/WiFi_Check
+#
+##################################################################
+# Settings
+# Where and what you want to call the Lockfile
+lockfile='/var/run/WiFi_Check.pid'
+# Which Interface do you want to check/fix
+wlan='wlan0'
+pingip='192.168.178.1'
+##################################################################
+echo
+echo "Starting WiFi check for $wlan"
+date
+echo
+# Check to see if there is a lock file
+if [ -e $lockfile ]; then
+# A lockfile exists... Lets check to see if it is still valid
+pid=`cat $lockfile`
+if kill -0 &>1 > /dev/null $pid; then
+# Still Valid... lets let it be...
+#echo "Process still running, Lockfile valid"
+exit 1
+else
+# Old Lockfile, Remove it
+#echo "Old lockfile, Removing Lockfile"
+rm $lockfile
+fi
+fi
+# If we get here, set a lock file using our current PID#
+#echo "Setting Lockfile"
+echo $$ > $lockfile
+# We can perform check
+echo "Performing Network check for $wlan"
+/bin/ping -c 2 -I $wlan $pingip > /dev/null 2> /dev/null
+if [ $? -ge 1 ] ; then
+echo "Network connection down! Attempting reconnection."
+/sbin/ifdown $wlan
+/bin/sleep 5
+/sbin/ifup --force $wlan
+else
+echo "Network is Okay"
+fi
+echo
+echo "Current Setting:"
+/sbin/ifconfig $wlan | grep "inet addr:"
+echo
+# Check is complete, Remove Lock file and exit
+#echo "process is complete, removing lockfile"
+rm $lockfile
+exit 0
+##################################################################
+# End of Script
+##################################################################
+</code>
+\\
+\\
+~~DISCUSSION:closed~~

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