PC側からM5Stackへデータを送信する

bleSend.py

import asyncio
from bleak import BleakScanner, BleakClient

ADDRESS = None

async def ble_scan():
    global ADDRESS
    device_name = "ESP32"
    devices = await BleakScanner.discover()
    target_device = next((d for d in devices if d.name == device_name), None)
    
    if target_device:
        ADDRESS = target_device.address
        print(f"Found device: {target_device.name} at {ADDRESS}")
    else:
        print("Device not found")

async def connect_and_write():
    global ADDRESS

    if not ADDRESS:
        print("No device address available")
        return
    
    client = BleakClient(ADDRESS, use_cached=False)
    
    try:
        await client.connect()
        print("Connected to device")
        
        write_UUID = "6E400002-B5A3-F393-E0A9-E50E24DCCA9E"  #ここは適切な値に変える
        
        while True:
            val = input("Input message to send (or 'exit' to quit): ")
            if val.lower() == 'exit':
                break
            write_value = bytearray(val.encode('utf-8'))
            await client.write_gatt_char(write_UUID, write_value)
            print(f"Written: {val}")
    
    except Exception as e:
        print(f"An error occurred: {e}")
    
    finally:
        await client.disconnect()
        print("Disconnected from device")

if __name__ == "__main__":
    asyncio.run(ble_scan())
    asyncio.run(connect_and_write())