serialx 0.2.0

Serial library with native async support for Windows and POSIX

Introduction

Serialx is a no-compromise serial communication library for Python targeting common platforms such as Linux (POSIX), macOS, and Windows. It provides both synchronous and native asynchronous APIs for all platforms.

Installation

pip install serialx

Usage

Serialx features a pyserial and pyserial-asyncio compatibility layer for easy testing. As early as possible, run serialx.patch_pyserial() and it will provide API-compatible replacements.

import serialx
serialx.patch_pyserial()

# These will now use serialx
import serial
import serial_asyncio

Serialx features a familiar synchronous API:

import serialx

with serialx.Serial("/dev/serial/by-id/port", baudrate=115200) as serial:
    data = serial.readexactly(5)
    serial.write(b"test")

    serial.set_modem_bits(rts=True, dtr=True)
    bits = serial.get_modem_bits()
    assert bits.rts is True
    assert bits.dtr is True

A high-level asynchronous serial (reader, writer) pair:

import asyncio
import contextlib

import serialx

async def main():
	reader, writer = await serialx.open_serial_connection("/dev/serial/by-id/port", baudrate=115200)

	with contextlib.closing(writer):
	    data = await reader.readexactly(5)
	    writer.write(b"test")
	    await writer.drain()

And a low-level asynchronous serial transport:

import asyncio
import serialx

async def main():
	loop = asyncio.get_running_loop()
	protocol = YourProtocol()

	transport, protocol = await serialx.create_serial_connection(
	    loop,
	    lambda: protocol,
	    url="/dev/serial/by-id/port",
	    baudrate=115200
	)

	await transport.set_modem_bits(rts=True, dtr=True)