Read JSON stream from FLARM Atom UAV via serial

flarm_atom_uav_read.py

# Prerequisites:
# * Install pyserial-asyncio==0.6
# * Add udev-rule for Flarm ATOM UAV, so it will show up as symlink '/dev/ttyUSB-ATOM':
#   ACTION=="add", SUBSYSTEM=="tty", ATTRS{idVendor}=="10c4", ATTRS{idProduct}=="ea60", SYMLINK+="ttyUSB-ATOM"
#
import asyncio
import json
import logging
from typing import Generator

from serial_asyncio import open_serial_connection

logger = logging.getLogger(__name__)


async def read_serial_to_json(device: str, baudrate=115200) -> Generator[dict, None, None]:
    reader, writer = await open_serial_connection(url=device, baudrate=baudrate)
    while True:
        line = await reader.readline()
        line_str = line.decode().strip()
        data = json.loads(line_str)
        yield data


async def serial_print(device: str):
    async for data in read_serial_to_json(device=device):
        logger.debug(f"Received data: {data}")
        # Process JSON dictionary here


if __name__ == "__main__":
    logging.basicConfig(level=logging.DEBUG)
    loop = asyncio.get_event_loop()
    loop.run_until_complete(serial_print(device="/dev/ttyUSB-ATOM"))