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#!/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
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