使用TTL接到4G板子上，串口波特率选择115200，回车出现#时说明连接成功，

查看4G板网络指令：
ifconfig
当出现PPP0 内容信息时升级：
4G板升级指令：直接一起复制以下指令到终端中复制粘贴即可；(需要在4G板网络PPP0正常的前提下)


cat /etc/config/master_version
echo "info:2023090001" >/tmp/set_DEVID1
echo "info:2023090001" >/tmp/set_DEVID5
echo "info:4" >/tmp/set_DEVID6

chmod 777 /sbin/omc_nuc
uci set dtm.sys.net_mgip1=218.205.210.215
uci set dtm.sys.net_mgport1=6006
uci commit
omc_nuc  >/dev/null 2>&1 &
route add -net 218.205.210.215 netmask 255.255.255.255 dev ppp0
rm /sbin/dgm_upgrade
cd /sbin
wget http://218.205.210.215:6001/dgmgumq/dgm_upgrade
chmod 777 /sbin/dgm_upgrade
cd /tmp
rm dgm_upgrade.gz
wget http://218.205.210.215:6001/dgmgumq/dgm_upgrade.gz
dgm_upgrade 1>/dev/null 2>&1
ln -s /lib/libpaho-mqtt3c.so /lib/libpaho-mqtt3c.so.1
ln -s /lib/libssl.so.1.0.0 /lib/libssl.so.1.1
rm /etc/dpc_default_set0622
echo "info:180.153.49.187" >/tmp/set_vpnip1
echo "info:CaTtVlan418" >/tmp/set_vpnuser1
echo "info:SQqzQAu5t629cy24" >/tmp/set_vpnpsw1
echo "info:218.249.218.107" >/tmp/set_scip1
echo "info:20010" >/tmp/set_scport1
echo "info:10" >/tmp/set_nettype
cat /etc/config/master_version


看到最后输出版本信息为：10.63.10.X 时升级完成；

拨号测试：
uci set network.vpn.server=223.93.142.162;uci set network.vpn.username=ttcw2015;uci set network.vpn.password=ttcw@2015;uci commit;
l2tp.sh &
ifconfig


echo 1 >/tmp/TLOG




ln -s /lib/libcrypto.so.1.0.0 /lib/libcrypto.so.1.1;cd /tmp/;wget http://218.205.210.215:6001/dgmgumq/libmqtt_dpc_pv_tower.so;mv /tmp/libmqtt_dpc_pv_tower.so /lib/libmqtt_dpc_pv_tower.so;echo "version:10.63.10.45" >/etc/config/master_version
;killall dgm_ser;