# MIT License
#
# Copyright (c) 2018 Airthings AS
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
#
# https://airthings.com

from bluepy.btle import Scanner, DefaultDelegate
import time
import struct

class DecodeErrorException(Exception):
     def __init__(self, value):
         self.value = value
     def __str__(self):
         return repr(self.value)

class ScanDelegate(DefaultDelegate):
    def __init__(self):
        DefaultDelegate.__init__(self)

scanner = Scanner().withDelegate(ScanDelegate())

try:
    while 1:
        devices = scanner.scan(2.0)

        for dev in devices:
            ManuData = ""
            ManuDataHex = []
            for (adtype, desc, value) in dev.getScanData():
                serial_no = ""
                if (desc == "Manufacturer"):
                    ManuData = value

                if (ManuData == ""):
                    continue

                for i, j in zip (ManuData[::2], ManuData[1::2]):
                    ManuDataHex.append(int(i+j, 16))

                #Start decoding the raw Manufacturer data
                if ((ManuDataHex[0] == 0x34) and (ManuDataHex[1] == 0x03)):
                    serial_no = str(256*256*256*ManuDataHex[5] + 256*256*ManuDataHex[4] + 256*ManuDataHex[3] + ManuDataHex[2])
                    print "%s (%s), RSSI=%d dB, SN=%s" % (dev.addr, dev.addrType, dev.rssi, serial_no)
                else:
                    continue

except DecodeErrorException:
    pass