import serial
import time
#serialPort = serial.Serial('\\\\.\\COM12',  9600)
def getCRC16(data, is_hex=True):
    if is_hex:
        data = bytearray.fromhex(data)
    else:
        data = bytearray(data)
    CRC = 0
    for byte in data:
        CRC ^= byte
        for j in range(0, 8):
            if (CRC & 0x0001):
                CRC >>= 1
                CRC ^= 0x8408
            else:
                CRC >>= 1
    CRC = format(CRC, '02x')
    return CRC[2:4] + CRC[0:2]
    
cmd = ('02030630', '02030633',  '02030633', '02030633', '02030633', '02030633', '02030633', '02030633', '02030633', '02030633', '02030633', '02030633', '02030637','02030641', '02030C34FFFFFFFFFFFF', '02030633', '02030600', '02030633', '02030600', '02030633')
one = '02030600'
two = '02030633'
with serial.Serial('COM12', 9600, timeout=0.001) as ser:
    for i in cmd:
        print i
        time.sleep(.03)
        ser.write((i + getCRC16(i)).decode('hex'))
    while True:
       
        ser.write((one + getCRC16(one)).decode('hex'))
        time.sleep(.03)
        ser.write((two + getCRC16(two)).decode('hex'))
        line1 = ser.read(4)
        line2 = ser.read(5)
        #print line1.encode('hex')
        #print line2.encode('hex')
        
        patern = "02030780"
        if line1.encode('hex') == patern:
            time.sleep(.03)
            ser.write(('02030635' + getCRC16('02030635')).decode('hex'))
            print 'opredelil'
            print line2.encode('hex')
            if line2.encode('hex') == "04a875":
                ser.write(('02030600' + getCRC16('02030635')).decode('hex'))
                print '100rub'
            elif line2.encode('hex') == "031701":
                ser.write(('02030600' + getCRC16('02030635')).decode('hex'))
                print '50rub'