#!/bin/bash

echo "Waiting for modem's CDC ACM to appear"
while [ ! -e /dev/ttyACM0 ]
do
  sleep 1
done
echo "Modem found, waiting for it to start up"

#sudo ifconfig wlan0 down
sudo ifconfig wwan1 down
sleep 2

n=0
until [ $n -ge 100 ]
do
  echo "stty"
  sudo stty -F /dev/ttyACM0 cs8 -cstopb -parenb 115200 && break
  echo "failed, waiting and retrying"
  n=$[$n+1]
  sleep 1
done

if [ $n -ge 100 ];
then exit 1
fi

n=0
until [ $n -ge 5 ]
do
  echo "chat 1"
  sudo chat -v -f modem.chat < /dev/ttyACM0 > /dev/ttyACM0 && break
  echo "failed, waiting and retrying"
  n=$[$n+1]
  sleep 10
done

if [ $n -ge 5 ];
then exit 1
fi

echo "Configuring wwan1"
sudo ifconfig wwan1 down
sudo ifconfig wwan1 -arp www.xxx.yyy.zzz # my IP
sudo route add default wwan1
echo "nameserver 198.224.182.135" | sudo tee -a /etc/resolv.conf
echo "nameserver 198.224.183.135" | sudo tee -a /etc/resolv.conf

n=0
until [ $n -ge 5 ]
do
  echo "chat 2"
  sudo chat -v -f modem.chat2 < /dev/ttyACM0 > /dev/ttyACM0 && break
  echo "failed"
  n=$[$n+1]
  sleep 1
done

if [ $n -ge 5 ];
then exit 1
fi

echo "should be good to go..."