import serial
from serial.tools.list_ports import comports
from serial.tools import hexlify_codec
ser = serial.Serial('/dev/ttyUSB0')  # open serial port

while True:
	line = ser.readline()   # read a '\n' terminated line
	if int(line) < 100:
		print("jour")

	if int(line) > 700:
		print("nuit")
	print(line)