Simple script to parse UART on linux

serial_read_python.py

import serial
import sys
import argparse

class ConnectionHandle:
	def __init__(self, *args, **kwargs):
		self._isactive = False
		self._connection = None
		self._bytes_available = 0

		for k, v in kwargs.items():
			setattr(self, k, v)

	def __bool__(self):
		return self._isactive

	def __repr__(self):
		return f"ConnectionHandle(active: {self._isactive})"

	def connect_arduino(self, port, baudrate, 
			    parity=serial.PARITY_NONE, 
			    stopbits=serial.STOPBITS_ONE, 
			    bytesize=serial.EIGHTBITS,
			    timeout=0) -> bool:
		try:

			self._connection = serial.Serial(port=port,
							 baudrate=baudrate,
							 parity=parity,
							 stopbits=stopbits,
							 bytesize=bytesize,
							 timeout=timeout)
		except serial.serialutil.SerialException as e:
			self._isactive = False
			raise(e)
		else:
			self._isactive = True

	def readline(self):
		return self._connection.readline().decode("utf-8")

	def close(self):
		self._connection.close()
		self._isactive = False

if __name__ == "__main__":
	argument_parser = argparse.ArgumentParser()
	argument_parser.add_argument("-port", help="Serial port for the device, linux: usually /dev/ttylS* (* = some digit), Windows usually COM*")
	argument_parser.add_argument("-baudrate", help="Baudrate for communications, usually 9600 or 115200")
	args = argument_parser.parse_args()

	arduino_connection = ConnectionHandle()
	arduino_connection.connect_arduino(port=args.port, baudrate=args.baudrate)

	while arduino_connection:
		try:
			reading = arduino_connection.readline()
			if reading:
				print(reading)
		except KeyboardInterrupt:
			arduino_connection.close()
			print("connection closed")
			sys.exit(0)