switch bot on windows

switch_bot.py

import asyncio
import binascii
from bleak import BleakClient, BleakScanner

COMMUNICATION_SERVICE_UUID = "cba20d00-224d-11e6-9fb8-0002a5d5c51b"
RX_CHARACTERISTIC_UUID = "cba20002-224d-11e6-9fb8-0002a5d5c51b"
TX_CHARACTERISTIC_UUID = "cba20003-224d-11e6-9fb8-0002a5d5c51b"

PRESS = "PRESS"
ON = "ON"
OFF = "OFF"
DOWN = "DOWN"
UP = "UP"

PREFIX_NOPASSWORD = "5701"
PREFIX_PASSWORD = "5711"
PREFIX_INFO = "5712"

SUFFIX_PRESS = "00"
SUFFIX_ON = "01"
SUFFIX_OFF = "02"
SUFFIX_DOWN = "03"
SUFFIX_UP = "04"


async def scan():
    devices = await BleakScanner.discover()
    for d in devices:
        print(d.address, d.name, d.metadata)


async def send_data(data: bytes, address, loop, timeout):
    async with BleakClient(address, loop=loop, timeout=timeout) as client:
        is_connected = await client.is_connected()
        if is_connected:
            await client.write_gatt_char(RX_CHARACTERISTIC_UUID, data)
        else:
            print("not connected")


def make_data(key: str, password=None) -> bytes:
    d = {PRESS: SUFFIX_PRESS,
         ON: SUFFIX_ON,
         OFF: SUFFIX_OFF,
         DOWN: SUFFIX_DOWN,
         UP: SUFFIX_UP}

    assert key in d.keys()

    prefix = PREFIX_NOPASSWORD
    if password:
        prefix = PREFIX_PASSWORD + format(binascii.crc32(password.encode("ascii")) & 0xffffffff, "x")

    suffix = d[key]

    return binascii.a2b_hex(prefix + suffix)


def main():
    address = ""
    password = None

    # loop = asyncio.get_event_loop()
    # loop.run_until_complete(scan())

    data = make_data(key=PRESS, password=password)
    loop.run_until_complete(send_data(data=data, address=address, loop=loop, timeout=10))


if __name__ == '__main__':
    main()