Python 中的低功耗蓝牙

Question

我正在尝试使用蓝牙低能与其他设备进行通信。通过沟通，我的意思是发送将在我所在的区域中侦听的设备上显示的简短消息。我正在使用Bleak python库。 这是示例代码，我在堆栈上找到了此代码，它列出了蓝牙设备。

import asyncio
import logging

from bleak import discover
from bleak import BleakClient

devices_dict = {}
devices_list = []
receive_data = []


# To discover BLE devices nearby
async def scan():
    dev = await discover()
    for i in range(0, len(dev)):
        # Print the devices discovered
        print("[" + str(i) + "]" + dev[i].address, dev[i].name, dev[i].metadata["uuids"])
        # Put devices information into list
        devices_dict[dev[i].address] = []
        devices_dict[dev[i].address].append(dev[i].name)
        devices_dict[dev[i].address].append(dev[i].metadata["uuids"])

        devices_list.append(dev[i].address)


def notification_handler(sender, data):
    print(', '.join('{:02x}'.format(x) for x in data))


async def run(address, debug=False):
    log = logging.getLogger(__name__)
    if debug:
        import sys

        log.setLevel(logging.DEBUG)
        h = logging.StreamHandler(sys.stdout)
        h.setLevel(logging.DEBUG)
        log.addHandler(h)

    async with BleakClient(address) as client:
        x = await client.is_connected()
        log.info("Connected: {0}".format(x))

        for service in client.services:
            log.info("[Service] {0}: {1}".format(service.uuid, service.description))
            for char in service.characteristics:
                if "read" in char.properties:
                    try:
                        value = bytes(await client.read_gatt_char(char.uuid))
                    except Exception as e:
                        value = str(e).encode()
                else:
                    value = None
                log.info(
                    "\t[Characteristic] {0}: (Handle: {1}) ({2}) | Name: {3}, Value: {4} ".format(
                        char.uuid,
                        char.handle,
                        ",".join(char.properties),
                        char.description,
                        value,
                    )
                )
                for descriptor in char.descriptors:
                    value = await client.read_gatt_descriptor(descriptor.handle)
                    log.info(
                        "\t\t[Descriptor] {0}: (Handle: {1}) | Value: {2} ".format(
                            descriptor.uuid, descriptor.handle, bytes(value)
                        )
                    )

                CHARACTERISTIC_UUID = "put your characteristic uuid"

                await client.start_notify(CHARACTERISTIC_UUID, notification_handler)
                await asyncio.sleep(5.0)
                await client.stop_notify(CHARACTERISTIC_UUID)


async def foo(address):
    async with BleakClient(address) as client:
        client.start_notify(address, callback)


if __name__ == "__main__":
    print("Scanning for peripherals...")

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

    # let user chose the device
    index = input('please select device from 0 to ' + str(len(devices_list)) + ":")
    index = int(index)
    address = devices_list[index]
    print("Address is " + address)

    # Run notify event
    loop = asyncio.get_event_loop()


    def callback(sender: int, data: bytearray):
        print(f"{sender}: {data}")


    loop.run_until_complete(foo(address))

问题是有时它并非所有可访问的设备显示。我想添加向其发送简短消息的功能，但是找不到任何适当的教程或代码示例。它应该像一个信标。

Answer 1

我已经深入探索了您的问题，我认为Repo A已被Ołgaban组织弄清楚可能会有所帮助。

https://github.com/olgaban/ogwarning

这些伙计们使用EddiestOne Beaton来广告一条消息