lennart-k/python-async-firmata

An asynchronous interface for the Firmata protocol

async-firmata

An asynchronous interface for the Firmata protocol

async-firmata is a Firmata library built with asynchronous programming in mind

Features

• asynchronous
• digital_write
• analog_write
• pin value reporting

Installation

You can currently install the latest version for Python >= 3.6 with

python -m pip install git+https://github.com/lennart-k/python-async-firmata

Example

import asyncio

from async_firmata.board import SerialFirmataBoard
from async_firmata.pin import Pin
from async_firmata.const import *


loop = asyncio.get_event_loop()

board = SerialFirmataBoard(
    "/dev/ttyUSB0",
    loop=loop)


async def value_change(pin: Pin, value: float) -> None:
    await board.digital[3].analog_write(value)


async def main() -> None:
    await board.setup()
    await board.digital[3].pin_mode(ANALOG_OUTPUT)
    await board.analog[1].pin_mode(ANALOG_INPUT)
    board.analog[1].set_callback(value_change)
    await board.analog[1].set_reporting(True)

loop.call_soon(lambda: loop.create_task(main()))

try:
    loop.run_forever()
except KeyboardInterrupt:
    pass
finally:
    loop.run_until_complete(board.close())
    loop.close()