# iBeacon scanner

* 之前的版本: https://github.com/jay16213/pi-ble-scanner
* 此版本使用兩個樹莓派, 如果同時掃到同一個uuid, 才視為有這個人在. 現在使用一個裝置即可.
* ref: https://github.com/citruz/beacontools

* 安裝相關套件

# install libbluetooth headers and libpcap2
sudo apt-get install python-dev libbluetooth-dev libcap2-bin

# grant the python executable permission to access raw socket data
sudo setcap 'cap_net_raw,cap_net_admin+eip' $(readlink -f $(which python3))

# install beacontools with scanning support
# 看是使用python或python3
pip install beacontools[scan]
pip3 install beacontools[scan]

* 掃描程式 (其實跟github上是同一個, 只是少了socket與arg的功能. 然後多一個RSSI的資訊)

import time, sys
import socket
#import argparse
from beacontools import BeaconScanner, IBeaconFilter

#parser = argparse.ArgumentParser()
#parser.add_argument("id")
#parser.add_argument("addr")
#parser.add_argument("port", type=int)

def callback(bt_addr, rssi, packet, additional_info):
    # print("<%s, %d> %s %s" % (bt_addr, rssi, packet, additional_info))
    uuid = additional_info['uuid']

    global numOfPeople
    global validUUID
    if uuid in validUUID:
        # if this uuid is already scanned, ignore it
        if uuid not in scanList:
            print("legal uuid: {}".format(uuid))
            print("RSSI: {}".format(rssi))
            scanList.append(uuid)
            numOfPeople += 1
    else:
        print("illegal uuid: {}".format(uuid))

def getValidUUID():
    print("loading legal uuid")
    v = []
    with open('uuid.txt') as f:
        for line in f:
            uuid = line.split("\n")[0] # cut the newline character
            print(uuid)
            v.append(uuid)
    return v

if __name__=='__main__':
#    args = parser.parse_args()

#    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
#    sock.connect((args.addr, args.port))

    numOfPeople = 0
    validUUID = getValidUUID()
    scanner = BeaconScanner(callback)
    print("start scan")
    scanner.start()
    while True:
        try:
                print("----------")
                numOfPeople = 0
                scanList = []
                time.sleep(2)

                print("scanned: {}".format(numOfPeople))

#                # convert list of uuid to a long string, separate
#                uuid_list = ' '.join(scanList)

#                # fix msg to 1024 bytes and encode in ascii
#                msg = str("{} {}".format(len(scanList), uuid_list)).ljust(1024, '\x00').encode("ascii")
#                sock.send(msg)

        except KeyboardInterrupt: # if user press ctrl-C => exit the program
            scanner.stop()
#            sock.close()
            sys.exit(0)

* 準備一個合法uuid list: uuid.txt
* 直接看尾數的01, 02...來區分人員身分

00000000-1111-1111-0000-000000556601
00000000-1111-1111-0000-000000556602
.
.
.

* iBeacon的設定方式 (要用iphone或ipad才可以)
* https://youyouyou.pixnet.net/blog/post/119467351