eddystone_scan.sh

#!/bin/bash
# Eddystone Scan by Arda Karaduman
# Based on ibeacon_scan by radius networks
# http://stackoverflow.com/questions/21733228/can-raspberrypi-with-ble-dongle-detect-ibeacons

if [[ $1 == "parse" ]]; then
  packet=""
  capturing=""
  count=0
  while read line
  do
    count=$[count + 1]
    if [ "$capturing" ]; then
      if [[ $line =~ ^[0-9a-fA-F]{2}\ [0-9a-fA-F] ]]; then
        packet="$packet $line"
      else

          if [[ $packet =~ ^04\ 3E\ .{2}\ 02\ 01\ .{26}\ 02\ 01\ .{12} ]]; then
#	      printf "$packet\n"

	      TYPE=`echo $packet | sed 's/^.\{75\}\(.\{2\}\).*$/\1/'`

	      POWER=`echo $packet | sed 's/^.\{78\}\(.\{2\}\).*$/\1/'`
	      POWER=`echo "ibase=16; $POWER" | bc`
	      POWER=$[POWER - 256]

	      LEN=$[${#packet} - 2]
	      RSSI=`echo $packet | sed "s/^.\{$LEN\}\(.\{2\}\).*$/\1/"`
	      RSSI=`echo "ibase=16; $RSSI" | bc`
	      RSSI=$[RSSI - 256]

	      case "$TYPE" in
		  00)
		      TYPE=UID
		      UUID=`echo $packet | sed 's/^.\{81\}\(.\{30\}\).*$/\1/'`
		      INSTANCE=`echo $packet | sed 's/^.\{111\}\(.\{18\}\).*$/\1/'`

		      echo "TYPE : $TYPE UUID : $UUID INSTANCE : $INSTANCE POWER : $POWER RSSI : $RSSI"
		      ;;
		  10)
		      TYPE=URL
		      SCHEME=`echo $packet | sed 's/^.\{81\}\(.\{2\}\).*$/\1/'`
		      LEN=$[${#packet} - 86]
		      URL=`echo $packet | sed "s/^.\{83\}\(.\{$LEN\}\).*$/\1/"`
		      URL=`echo $URL | sed 's/ /\\\x/g'`
		      URL="\\x$URL"
		      URL=`echo -e $URL | awk '{printf "%s\n", $_}'`
		      echo "TYPE : $TYPE SCHEME : $SCHEME URL : $URL POWER : $POWER RSSI : $RSSI"
		      ;;
		  20)
		      TYPE=TLM
		      VERSION=`echo $packet | sed 's/^.\{78\}\(.\{2\}\).*$/\1/'`
		      BATTERY=`echo $packet | sed 's/^.\{81\}\(.\{5\}\).*$/\1/' | sed 's/ //g'`
		      BATTERY=`echo "ibase=16; $BATTERY" | bc`
		      TEMP=`echo $packet | sed 's/^.\{87\}\(.\{5\}\).*$/\1/' | sed 's/ //g'`
		      TEMP=`echo "ibase=16; $TEMP" | bc`
		      TEMP=`bc <<< "scale=2; $TEMP/256"`
		      PCOUNT=`echo $packet | sed 's/^.\{93\}\(.\{11\}\).*$/\1/' | sed 's/ //g'`
		      PCOUNT=`echo "ibase=16; $PCOUNT" | bc`
		      TIME=`echo $packet | sed 's/^.\{105\}\(.\{11\}\).*$/\1/' | sed 's/ //g'`
		      TIME=`echo "ibase=16; $TIME" | bc`

		      echo "TYPE : $TYPE VERSION : $VERSION BATTERY : $BATTERY TEMP : $TEMP PCOUNT : $PCOUNT TIME : $TIME RSSI : $RSSI"
		      ;;
	      esac
          fi
          capturing=""
          packet=""
      fi
    fi

    if [ ! "$capturing" ]; then
      if [[ $line =~ ^\> ]]; then
        packet=`echo $line | sed 's/^>.\(.*$\)/\1/'`
        capturing=1
      fi
    fi
  done
else
  sudo hcitool lescan --duplicates 1>/dev/null &
  if [ "$(pidof hcitool)" ]; then
    sudo hcidump --raw hci | ./$0 parse $1
  fi
fi