Add README.md

README.md

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+## Check the internetconnection  
+
+
+### checkconnection.sh  
+  
+Check the connection with curl or ping if not available.  
+
+  
+### restartmodem.sh  
+  
+Restart any given interface of OpenWrt.
+
+
+## How to install on OpenWrt
+
+
+### Download scripts and make it executeable
+
+Wget should be installed by default on OpenWrt. (git works as well, but it's not installed by default.)
+
+``
+# wget https://git.datenkastl.org/shell-scripts/checkconnection/raw/branch/main/checkconnection.sh
+# wget https://git.datenkastl.org/shell-scripts/checkconnection/raw/branch/main/restartmodem.sh
+# chmod +x checkconnection.sh
+# chmod +x restartmodem.sh
+``
+
+
+### Add restartmodem.sh as failcommand
+
+Open checkconnection
+``
+# vi checkconnection.sh
+``
+and add the path to your *restartmodem.sh* at *failcommand=*
+
+
+### Install curl if desired
+
+``
+# opkg update
+# opkg install curl
+``
+
+
+### Add cronjob
+
+Open crontab
+``
+# crontab -e
+``
+and add vor example 
+``
+*/1 * * * *     /root/scripts/checkconnection.sh > /dev/zero*
+``
+to check the connection every minute and restart the modem if the check fails.