#!/usr/bin/env python3

import serial
import sys


TIMEOUT = 60*60*8
with serial.Serial(sys.argv[1] if len(sys.argv) > 1 else "/dev/ttyACM1", 9600, timeout=TIMEOUT) as ser:
    while True:
        w = ser.read(1)
        sys.stdout.buffer.write(w)
        sys.stdout.buffer.flush()