import serial
import sys

serial_port = '/dev/ttyUSB0'
baud = 9600
samples = 100

if len(sys.argv) > 1:
	serial_port = sys.argv[1]

ser = serial.Serial(serial_port, baud)
while True:   # stop with CTRL+C
	try:
		a = int(input())
		ser.write(b'\x01')
		ser.write(b'\x02')
		ser.write(b'\x03')
		ser.write(b'\x04')
		val = (a*100).to_bytes(3, byteorder='little')
		ser.write(val)
		ser.flush()
	except ValueError:
		pass