【树莓派】树莓派使用4G模块上网

想了解一下树莓派通过4G网络模块通信如何实现，看到这篇文章（http://www.lxway.com/95811506.htm），准备接下来有机会实践一下，先留存学习；

一、4G Luci配置

1、 新建一个wwan接口；

2、 上网方式为dhcp自动获取；

3、 物理设置选择wwan0；

4、 防火墙选择wan

二、重连脚本redial4g

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LogFile=/root/4g_Log.log mdate=`date +%R-%d-%m-%Y`   if [ -e /var/run/udhcpc-wwan0.pid ]; then     echo 4G pid is ok!        #echo $mdate 4G pid is ok! >> $LogFile     #exit 0 else     echo 4G pid is failed!     echo $mdate 4G pid is failed! >> $LogFile     #/etc/myLte/dial4g     #reboot     #exit 0 fi   if ping -c3 www.baidu.com > /dev/null 2>&1 then     echo ping baidu is ok!     #echo $mdate  ping baidu is ok! >> $LogFile     echo 0 > /tmp/4g_tmp.txt     exit 0 else     echo ping baidu is failed!     echo $mdate ping baidu is failed! >> $LogFile     /etc/myLte/dial4g  #must place here     #read pvar < /tmp/4g_temp.txt     #if [ -z "$pvar" ] ; then     #    pvar=0     #fi        if [ ! -f "/tmp/4g_tmp.txt" ] ; then         pvar=0         echo file not exist     else         read pvar < /tmp/4g_tmp.txt         echo file exist     fi     pvar=`expr $pvar + 1`     echo $pvar > /tmp/4g_tmp.txt     if [ $pvar -ge 5 ] ; then         echo failed 5 times!         echo $mdate failed 5 times! >> $LogFile         reboot        fi       fi exit 0

　　

三、crontab

*/2 * * * * /etc/myLte/redial4g

重连时间不要设太短，太短可能还没拨号结束就又进行重播，会重复了。

四、拨号脚本dial4g

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PORT=/dev/ttyUSB0 MODE="AT+CFUN=1" gcom -d $PORT -s /etc/gcom/setmode.gcom sleep 3 MODE="AT+COPS=0" gcom -d $PORT -s /etc/gcom/setmode.gcom sleep 3 MODE="AT+CEREG=1" gcom -d $PORT -s /etc/gcom/setmode.gcom sleep 3 MODE="AT+CGDCONT=1,'IP'" gcom -d $PORT -s /etc/gcom/setmode.gcom sleep 3 MODE="AT+CGACT=1,1" gcom -d $PORT -s /etc/gcom/setmode.gcom sleep 3 MODE="AT+ZGACT=1,1" gcom -d $PORT -s /etc/gcom/setmode.gcom sleep 3 ifup wwan & exit 0

　　

五、开机启动

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# Put your custom commands here that should be executed once # the system init finished. By default this file does nothing.   /etc/myLte/dial4g   exit 0