Read binary data from a serial port and output each byte in hexadecimal.

read_hex.py

#!/usr/bin/python

import serial
import signal
import sys

# Specify your communication parameters here
ser = serial.Serial(
  port="/dev/ttyUSB0",
  baudrate = 9600,
  parity=serial.PARITY_NONE,
  stopbits=serial.STOPBITS_ONE,
  bytesize=serial.EIGHTBITS,
  timeout=0.004011
  )

# To handle keyboard interrupt
def sigint_handler(signal, frame):
    print('\nInterrupted')
    sys.exit(0)
signal.signal(signal.SIGINT, sigint_handler)

ser.reset_input_buffer()

while True:
  s = ser.read(1)

  if len(s) == 1:
    print(format(ord(s),'02X'))