0、準備

1.開始

コンピュータのBluetoothバージョンを確認

2. scann

スキャン確認

import asyncio
from bleak import BleakScanner

async def main():
    devices = await BleakScanner.discover()
    for d in devices:
        print(d)

asyncio.run(main())

3. ble connect

paring

ペアリング関数

connect

import asyncio
from bleak import BleakClient

# 장비 address 작성 
address = "--:--:--:--:--:--"

async def main(address):
    client = BleakClient(address)
    try:
        await client.connect() 
        print("connect to " + client.address)
    except Exception as e:
        print(e)
    finally:
        await client.disconnect()

asyncio.run(main(address))

error:接続に失敗したエラー

解決策:Bluetoothホールの使用

4.受信データ

notify and read

import asyncio
from bleak import BleakClient

address = "--:--:--:--:--:--"

#charateristic uuid
C_uuid = "00001524-1212-efde-1523-785feabcd123"

def callback(sender:int , data:bytearray):
    pass

async def main(address):
    client = BleakClient(address)
    try:
        #connect
        await client.connect() 
        print("connect to " + client.address)

        #notify
        await client.start_notify(C_uuid,callback)

        #read
        while(True):
            data = await client.read_gatt_char(C_uuid)
            print(bytes(data))

      
        
    except Exception as e:
        print(e)
        pass

    finally:
        await client.disconnect()

asyncio.run(main(address))