Script to connect a Quectel 5G modem with qmicli

quectel-5g-connect.sh

#!/bin/bash

# Set traps to catch exite signals
trap stopservice SIGINT
trap stopservice SIGKILL
trap stopservice SIGTERM

function stopservice {
	if [[ ! -z ${DATA_HANDLE} && ! -z ${CLIENT_CID} ]]
	then
		LOG_DATE=( $(date +"%Y %b %H:%M") )
		echo "${LOG_DATE[@]} - Terminating 5G-Network: PACKET DATA HANDLE - > ${DATA_HANDLE} and CLIENT CID -> ${CLIENT_CID}"
		ip addr flush dev wwan0
		qmicli --device /dev/cdc-wdm0 --device-open-proxy --wds-stop-network=${DATA_HANDLE} --client-cid=${CLIENT_CID}
	else
		LOG_DATE=( $(date +"%Y %b %H:%M") )
		echo "${LOG_DATE[@]} - Terminating 5G-Network: no PACKET DATA HANDLE and no CLIENT CID"
	fi
	exit 0
}

# Check if interface exists
if [ ! -e /dev/cdc-wdm0 ]
then
	LOG_DATE=( $(date +"%Y %b %H:%M") )
        echo "${LOG_DATE[@]} - Error - interface cdc-wdm0 not found!..."
        exit 1
fi
LOG_DATE=( $(date +"%Y %b %H:%M") )
echo "${LOG_DATE[@]} - Found interface cdc-wdm0."

# Check if configuration file exists
if [ ! -f /etc/default/5g-network ]
then
	LOG_DATE=( $(date +"%Y %b %H:%M") )
        echo "${LOG_DATE[@]} - Error - Configuration file /etc/default/5g-network not found!..."
        exit 1
fi
LOG_DATE=( $(date +"%Y %b %H:%M") )
echo "${LOG_DATE[@]} - Found configuration file(/etc/default/5g-network)."

# Import variables from configuration file
source /etc/default/5g-network

# Start service loop
while true
do
	# Get SIM status
	LOG_DATE=( $(date +"%Y %b %H:%M") )
	echo "${LOG_DATE[@]} - Querying SIM card 1."
	CARD_STATUS=( $(qmicli -d /dev/cdc-wdm0 --device-open-proxy --uim-get-slot-status | grep -A 1 "Physical slot 1" | grep "Card status" | awk '{ print $3 }') )

	while [[ $CARD_STATUS != "present" ]]
	do
		LOG_DATE=( $(date +"%Y %b %H:%M") )
		echo "${LOG_DATE[@]} - SIM card not detected!"
		echo "${LOG_DATE[@]} - SIM card not detected - powering off SIM 1."
		qmicli -d /dev/cdc-wdm0 --device-open-proxy --uim-sim-power-off=1
		sleep 1
		echo "${LOG_DATE[@]} - SIM card not detected - powering on SIM 1."
		qmicli -d /dev/cdc-wdm0 --device-open-proxy --uim-sim-power-on=1
		sleep 1
		CARD_STATUS=( $(qmicli -d /dev/cdc-wdm0 --device-open-proxy --uim-get-slot-status | grep -A 1 "Physical slot 1" | grep "Card status" | awk '{ print $3 }') )
		sleep 5
	done

	LOG_DATE=( $(date +"%Y %b %H:%M") )
	echo "${LOG_DATE[@]} - SIM card detected - SIM 1"

	# Get IP configuration form interface wwan0
	LOG_DATE=( $(date +"%Y %b %H:%M") )
	echo "${LOG_DATE[@]} - Querying raw_ip on interface wwan0."
	RAW_IP=( $(cat /sys/class/net/wwan0/qmi/raw_ip) )

	if [[ $RAW_IP != 'Y' ]]
	then
		LOG_DATE=( $(date +"%Y %b %H:%M") )
		echo "${LOG_DATE[@]} - RAW_IP not set on interface wwan0!"
		echo "${LOG_DATE[@]} - Setting raw_ip on interface wwan0."
		ip link set dev wwan0 down
		echo Y > /sys/class/net/wwan0/qmi/raw_ip
		ip link set dev wwan0 up
	else
		LOG_DATE=( $(date +"%Y %b %H:%M") )
		echo "${LOG_DATE[@]} - RAW_IP set on interface wwan0."
	fi

	ip link set wwan0 mtu 1400

	if [ ! -z $PIN ]
	then
		LOG_DATE=( $(date +"%Y %b %H:%M") )
		echo "${LOG_DATE[@]} - PIN configuration detected, setting PIN"
		qmicli --device=/dev/cdc-wdm0 --device-open-proxy --uim-verify-pin=PIN1,$PIN
	fi

	qmicli --device /dev/cdc-wdm0 --device-open-proxy  --wds-set-ip-family=4

	if [ ! -z $APN ]
	then
		LOG_DATE=( $(date +"%Y %b %H:%M") )
		echo "${LOG_DATE[@]} - APN configuration found, APN = ${APN}"
		QMI_RESULT=( $(qmicli --device /dev/cdc-wdm0 --device-open-proxy  --wds-start-network="${APN}" --client-no-release-cid) )
	else
		LOG_DATE=( $(date +"%Y %b %H:%M") )
		echo "${LOG_DATE[@]} - APN configuration not found, trying APN = internet"
		QMI_RESULT=( $(qmicli --device /dev/cdc-wdm0 --device-open-proxy  --wds-start-network="internet" --client-no-release-cid) )
	fi


	if [ ! -z ${QMI_RESULT} ]
	then
		DATA_HANDLE=( $(echo ${QMI_RESULT[6]} | cut -d "'" -f 2) )
		LOG_DATE=( $(date +"%Y %b %H:%M") )
		echo "${LOG_DATE[@]} - Got PACKET DATA HANDLE - > ${DATA_HANDLE}"

		CLIENT_CID=( $(echo ${QMI_RESULT[15]} | cut -d "'" -f 2) )
		LOG_DATE=( $(date +"%Y %b %H:%M") )
		echo "${LOG_DATE[@]} - Got CLIENT CID -> ${CLIENT_CID}"

	fi

	udhcpc -q -f -i wwan0

	UNREACHEABLE=0

	if [ ! -z $NET_TEST ]
	then
		LOG_DATE=( $(date +"%Y %b %H:%M") )
		echo "${LOG_DATE[@]} - Network test configuration found destination ${NET_TEST}."
		while [[ "$UNREACHEABLE" -eq "0" ]]
		do
			ping -q -c 1 $NET_TEST &> /dev/null
			UNREACHEABLE=$?
			sleep 5
		done
		LOG_DATE=( $(date +"%Y %b %H:%M") )
		echo "${LOG_DATE[@]} - Network error - ${NET_TEST} unreachable."

		if [[ ! -z ${DATA_HANDLE} && ! -z ${CLIENT_CID} ]]
		then
			LOG_DATE=( $(date +"%Y %b %H:%M") )
			echo "${LOG_DATE[@]} - Terminating 5G-Network: PACKET DATA HANDLE - > ${DATA_HANDLE} and CLIENT CID -> ${CLIENT_CID}"
			qmicli --device /dev/cdc-wdm0 --device-open-proxy --wds-stop-network=${DATA_HANDLE} --client-cid=${CLIENT_CID}
			ip addr flush dev wwan0
		else
			LOG_DATE=( $(date +"%Y %b %H:%M") )
			echo "${LOG_DATE[@]} - Terminating 5G-Network: no PACKET DATA HANDLE and no CLIENT CID"
		fi

	else
		while [ $CARD_STATUS == "present" ]
		do
			CARD_STATUS=( $(qmicli -d /dev/cdc-wdm0 --device-open-proxy --uim-get-slot-status --client-cid=${CLIENT_CID} | grep -A 1 "Physical slot 1" | grep "Card status" | awk '{ print $3 }') )
			sleep 5
		done
		LOG_DATE=( $(date +"%Y %b %H:%M") )
		echo "${LOG_DATE[@]} - SIM card not detected - SIM 1 has gone away."
	fi

done