#!/bin/env bash # Pinout for cellulariot app shield STATUS=20 POWERKEY=11 DISABLE=26 # General variables INTERVAL=60 DOUBLE_CHECK_WAIT=10 PING_TIMEOUT=9 # Configure pins gpio -g mode $STATUS in gpio -g mode $POWERKEY out gpio -g mode $DISABLE out function debug() { echo $(date "+%Y/%m/%d - %H:%M:%S :") "$1" } function check_network() { # Check the network is ready debug "Checking the network is ready..." for i in {1..600}; do NETWORK_OK=0 debug "SIM Status:" atcom AT+CPIN? OK ERROR 10 | grep "CPIN: READY" SIM_READY=$? debug "Network Registeration Status:" # For super SIM atcom AT+CREG? OK ERROR 10 | grep "CREG: 0,5" NETWORK_REG=$? # For native SIM atcom AT+CREG? OK ERROR 10 | grep "CREG: 0,1" NETWORK_REG_2=$? # Combined network registeration status NETWORK_REG=$((NETWORK_REG+NETWORK_REG_2)) if [[ $SIM_READY -eq 0 ]] && [[ $NETWORK_REG -le 1 ]]; then debug "Network is ready." NETWORK_OK=1 return 0 break else printf "?" fi sleep 2 done return 1 } function power_up_module() { for i in {1..20}; do if [[ $(gpio -g read $STATUS) -eq 1 ]]; then debug "Module is powering up..." gpio -g write $POWERKEY 0 gpio -g write $POWERKEY 1 sleep 2 gpio -g write $POWERKEY 0 sleep 2 if [[ $(gpio -g read $STATUS) -eq 0 ]]; then debug "Module is powered up." return 0 break else debug "Module couldn't be powered up!" sleep 2 else debug "Module is just powered up." return 0 break fi done return 1 } function restart_power() { debug "Power of the module is restarting..." # Restart power gpio -g write $DISABLE 0 # power is disabled sleep 2 gpio -g write $DISABLE 1 # power is enabled } restart_power # Restart power # Modem power up if power_up_module -eq 0 ; then sleep 0.1; else debug "Module couldn't be powered up! Check the hardware setup!"; fi if check_network -eq 0; then debug "PPP chatscript is starting..."; sudo pon; else debug "Network registeration is failed!"; fi while true; do # Checking cellular internet connection ping -q -c 1 -s 0 -w $PING_TIMEOUT -I ppp0 8.8.8.8 > /dev/null 2>&1 PINGG=$? if [[ $PINGG -eq 0 ]]; then printf "." else printf "/" sleep $DOUBLE_CHECK_WAIT # Checking cellular internet connection ping -q -c 1 -s 0 -w $PING_TIMEOUT -I ppp0 8.8.8.8 > /dev/null 2>&1 PINGG=$? if [[ $PINGG -eq 0 ]]; then printf "+" else debug "Connection is down, reconnecting..." if check_network -eq 0; then sleep 0.1; else debug "Network registeration is failed!"; fi sudo pon fi fi sleep $INTERVAL done