WXBeacon

wxbeacon.py

import asyncio
from bleak import BleakScanner

ibeacon_found_event = asyncio.Event()  # フラグとして使用

def parse_ibeacon(manufacturer_data: bytes):
    # AppleのiBeaconフォーマットか簡易チェック
    if len(manufacturer_data) < 23:
        return None
    if manufacturer_data[0] != 0x02 or manufacturer_data[1] != 0x15:
        # iBeaconタイプと長さでない場合は処理しない
        return None

    uuid = manufacturer_data[2:18]
    major = int.from_bytes(manufacturer_data[18:20], byteorder='big')
    minor = int.from_bytes(manufacturer_data[20:22], byteorder='big')
    tx_power = int.from_bytes(manufacturer_data[22:23], byteorder='big', signed=True)

    uuid_str = '-'.join([
        uuid[0:4].hex(),
        uuid[4:6].hex(),
        uuid[6:8].hex(),
        uuid[8:10].hex(),
        uuid[10:16].hex()
    ])

    return {
        "uuid": uuid_str,
        "major": major,
        "minor": minor,
        "tx_power": tx_power
    }

def detection_callback(device, advertisement_data):
    adv = advertisement_data.manufacturer_data
    if not adv:
        return

    for company_id, data in adv.items():
        if company_id != 0x004C:  # Apple
            continue

        ibeacon = parse_ibeacon(data)
        if not ibeacon or ibeacon['uuid'] != 'c722db4c-5d91-1801-beb5-001c4de7b3fd' :
            continue

        print(f"Device: {device.address} (Apple iBeacon)")
        print(f"  UUID: {ibeacon['uuid']}")
        print(f"  Major: {ibeacon['major']}")
        print(f"  Minor: {ibeacon['minor']}")
        print(f"  TxPower: {ibeacon['tx_power']} dBm")
        print(f"  Raw Data: {data.hex()}\n")

        temperature = (((ibeacon['major'] >> 4) & 0x03FF) * 100 - 30000) / 1000.0
        humidity = ((ibeacon['major'] << 3) & 0x0078) | ((ibeacon['minor'] >> 13) & 0x0007)
        pressure = round(((ibeacon['minor'] & 0x1FFF) * 0.1 + 300), 1)

        print(f"  温度: {temperature} °C")
        print(f"  湿度: {humidity} %")
        print(f"  気圧: {pressure} hPa\n")

        ibeacon_found_event.set()  # iBeacon が見つかったらフラグを立てる

async def scan_ble_until_found_or_timeout():
    scanner = BleakScanner(detection_callback=detection_callback)

    await scanner.start()
    print("Scanning for up to 30 seconds or until iBeacon is found...")

    try:
        # どちらか早い方が来たら停止
        await asyncio.wait_for(ibeacon_found_event.wait(), timeout=30.0)
        print("iBeacon found. Stopping scan.")
    except asyncio.TimeoutError:
        print("Timeout reached. No iBeacon found.")
    finally:
        await scanner.stop()

if __name__ == "__main__":
    asyncio.run(scan_ble_until_found_or_timeout())