#!/bin/sh

printf "Start at `date`\n"

while true; do
	state=`nmcli -f device,state device | grep ttyUSB2 | awk '{ print $2 }'`
	if [ "$state" = "disconnected" ]; then
		result=`nmcli device connect ttyUSB2 | grep 'Unknown error'`
		if [ "$result" ]; then
			echo "Device connect failed, need reset usb device"
			sleep 1
			/root/bin/reset-ttyUSB2
			count=0
			while [ "$count" -lt 60 ]; do
				printf "[$count]\r"
				state=`nmcli -f device,state device | grep ttyUSB2`
				[ "$state" ] && printf "\nGSM back '$state' at `date`\n" && break
				count=`expr $count + 1`
				sleep 1
			done
			if [ "$count" -eq 60 ]; then
				echo "Hmmm, after waiting for $count secs, GSM device still not back"
				echo "Do we need to reboot the system?"
				exit
			fi
		else
			echo "=== Connect return no error ==="
			nmcli device | grep ttyUSB2
			sleep 1
		fi
	else
		echo -n "."
		sleep 10
	fi
done