import serial
import time,sys
import array
SERIAL_PORT = '/dev/ttyUSB0'
ser = serial.Serial(SERIAL_PORT, baudrate = 115200 , timeout = 1)

arr=[]
j=0
i=0
commandarray = [0x7F]
print(commandarray)
ser.write(array.array('B', commandarray).tostring())
rcv = ser.read(1)
print (hex(ord(rcv)))

if (rcv =='y'):
    commandarray = [0x31,0xCE]
    print(commandarray)
    ser.write(array.array('B', commandarray).tostring())
    rcv = ser.read(1)
    print (hex(ord(rcv)))  
    if (rcv =='y'):
      commandarray = [0x08,0x00,0x00,0x00,0x08]
      print(commandarray)
      ser.write(array.array('B', commandarray).tostring())
      rcv = ser.read(1)
      print (hex(ord(rcv)))  
      if (rcv =='y'):
        commandarray = [0x03,0x01,0x02,0x02,0x04,(0x02^0x04)]
        print(commandarray)
        ser.write(array.array('B', commandarray).tostring())
        rcv = ser.read(1)
        print (hex(ord(rcv)))