check-in-system/Main.py at master · DundeeMakerSpace/check-in-system · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
import os, sys, serial, time
from pidfile import PidFile
import subprocess

def output(message):

    print(message)
    sys.stdout.flush()

codes = {}

def play_sound(sound):
    subprocess.call(['play', sound])

def scan_code(code):

    if code in codes.keys():
        codes[code] = not codes[code]
    else:
        codes[code] = True

    if codes[code]:
        output('checked in: {}'.format(code))
        play_sound('check_in.wav')
    else:
        output('checked out: {}'.format(code))
        play_sound('check_out.wav')

def main_rfid():

    output('Started')

    ser = serial.Serial("/dev/ttyAMA0")
    ser.baudrate = 9600

    data_line = ''
    prev_line = ''
    prev_time = 0

    while True:

        try:

            data = ser.read()

            ## Begin code
            if data == '\x02':
                pass

            ## End code
            elif data == '\x03':

                if prev_line != data_line or time.time() - prev_time >= 0.1:

                    prev_line = data_line
                    scan_code(data_line)

                prev_time = time.time()
                data_line = ''

            ## Data
            else:
                data_line += data

        except Exception as e:
            output(e)

    ser.close()

    output('Finished')

def main_nfc():

    print("I'm an NFC teapot, short and BEEP")

    reader = subprocess.Popen(['./just-use-c/dms-nfc-reader'], stdout=subprocess.PIPE)

    output = None

    while output != '':

        output = reader.stdout.readline()

        if 'READ' in output:
            scan_code(output[5:-1])

if __name__ == "__main__":

    path = os.path.dirname(os.path.realpath(__file__))
    os.chdir(path)

    with PidFile("/tmp/check-in-system.pid"):
        main_nfc()