bleak.exc.BleakError: Not connected

[dxdate]

• bleak version: 0.21.1
• Python version: 3.11
• Operating System: windows 11

Description

the connection closes 30-120 seconds after the script is run

Code

import time
import colorsys
import asyncio
from bleak import BleakClient, BleakScanner

BLEDOM_CHARACTERISTIC = "0000fff3-0000-1000-8000-00805f9b34fb"
import logging
logging.basicConfig(level=logging.DEBUG, filename="py_log.log",filemode="w")

class BleLedDevice:
    def __init__(self, peripheral, characteristics):
        self.peripheral = peripheral
        self.characteristics = characteristics

    @staticmethod
    async def new(device_address: str) -> "BleLedDevice":
        bt_client = BleakClient(device_address)
        device = BleLedDevice(bt_client, [])
        await device.connect()
        await device.discover_characteristics()
        await device.power_on()
        return device

    async def connect(self):
        await self.peripheral.connect()

    async def discover_characteristics(self):
        services = await self.peripheral.get_services()
        for service in services:
            for characteristic in service.characteristics:
                if characteristic.uuid == BLEDOM_CHARACTERISTIC:
                    self.characteristics.append(characteristic)
        if not self.characteristics:
            raise Exception(f"Couldn't find the BLEDOM characteristic on the device.")

    def _characteristic(self):
        return self.characteristics[0]

    async def power_on(self):
        """
        Power LED strip on.
        """

        await self.generic_command(0x04, 0xF0, 0x00, 0x01, 0xFF)

    async def power_off(self):
        """
        Power LED strip off.
        """

        await self.generic_command(0x04, 0x00, 0x00, 0x00, 0xFF)

    async def set_color(self, red: int, green: int, blue: int):
        """
        Show a solid colour.

        The values for `red`, `green` and `blue` are expected to be integers
        with values between 0 and 255 (inclusive).
        """

        await self.generic_command(0x05, 0x03, red, green, blue)

    async def set_brightness(self, value: int):
        """
        Show a solid brightness.

        The value for `value` is expected to be an integer between 0 and 100
        (inclusive).
        """

        await self.generic_command(0x01, min(value, 100), 0, 0, 0)

    async def generic_command(
        self,
        id: int,
        arg0: int = 0x00,
        arg1: int = 0x00,
        arg2: int = 0x00,
        arg3: int = 0x00,
        arg4: int = 0x00,
    ):
        data = bytearray([0x7E, 0x00, id, arg0, arg1, arg2, arg3, arg4, 0xEF])

        print("sending message %s" % list(data))
        await self.peripheral.write_gatt_char(self._characteristic(), data)

async def main():
    address = "BE:FF:F0:50:74:63"  # Replace with the actual device address
    device = await BleLedDevice.new(address)
    await device.power_on()

    transition_time = 1  # Время перехода между цветами, в секундах

    await device.set_brightness(10)
    while True:
        for hue in range(0, 360):
            hue_normalized = hue / 20.0
            r, g, b = colorsys.hsv_to_rgb(hue_normalized, 1, 1)

            await device.set_color(int(r*255), int(g*255), int(b*255))
            print(f"R: {int(r * 255)}, G: {int(g * 255)}, B: {int(b * 255)}")
            await asyncio.sleep(transition_time)

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

Logs

Traceback:
Traceback (most recent call last):
  File "C:\pythonProject\pythonProject1\2.py", line 121, in <module>
    asyncio.run(main())
  File "C:\Program Files\Python311\Lib\asyncio\runners.py", line 190, in run
    return runner.run(main)
           ^^^^^^^^^^^^^^^^
  File "C:\Program Files\Python311\Lib\asyncio\runners.py", line 118, in run
    return self._loop.run_until_complete(task)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Python311\Lib\asyncio\base_events.py", line 653, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File "C:\pythonProject\pythonProject1\2.py", line 114, in main
    await device.set_color(int(r*255), int(g*255), int(b*255))
  File "C:\pythonProject\pythonProject1\2.py", line 61, in set_color
    await self.generic_command(0x05, 0x03, red, green, blue)
  File "C:\pythonProject\pythonProject1\2.py", line 86, in generic_command
    await self.peripheral.write_gatt_char(self._characteristic(), data)
  File "C:\Program Files\Python311\Lib\site-packages\bleak\__init__.py", line 776, in write_gatt_char
    await self._backend.write_gatt_char(characteristic, data, response)
  File "C:\Program Files\Python311\Lib\site-packages\bleak\backends\winrt\client.py", line 887, in write_gatt_char
    raise BleakError("Not connected")
bleak.exc.BleakError: Not connected

Process finished with exit code 1

logging:

DEBUG:asyncio:Using proactor: IocpProactor
DEBUG:bleak.backends.winrt.scanner:Received 28:2B:B9:41:06:91: .
DEBUG:bleak.backends.winrt.scanner:Received 28:2B:B9:41:06:91: SberBoom Mini 1848.
DEBUG:bleak.backends.winrt.scanner:Received 17:44:73:9A:68:A2: .
DEBUG:bleak.backends.winrt.scanner:Received 28:2B:B9:41:06:91: .
DEBUG:bleak.backends.winrt.scanner:Received 28:2B:B9:41:06:91: SberBoom Mini 1848.
DEBUG:bleak.backends.winrt.scanner:Received BE:FF:F0:50:74:63: ELK-BLEDOM   .
DEBUG:bleak.backends.winrt.scanner:3 devices found. Watcher status: <BluetoothLEAdvertisementWatcherStatus.STOPPED: 3>.
DEBUG:bleak.backends.winrt.client:Connecting to BLE device @ BE:FF:F0:50:74:63
DEBUG:bleak.backends.winrt.client:getting services (service_cache_mode=None, cache_mode=None)...
DEBUG:bleak.backends.winrt.client:session_status_changed_event_handler: id: BluetoothLE#BluetoothLE04:7f:0e:43:b1:2c-be:ff:f0:50:74:63, error: <BluetoothError.SUCCESS: 0>, status: <GattSessionStatus.ACTIVE: 1>
DEBUG:bleak.backends.winrt.client:BE:FF:F0:50:74:63: services changed
DEBUG:bleak.backends.winrt.client:session_status_changed_event_handler: id: BluetoothLE#BluetoothLE04:7f:0e:43:b1:2c-be:ff:f0:50:74:63, error: <BluetoothError.SUCCESS: 0>, status: <GattSessionStatus.CLOSED: 0>
DEBUG:bleak.backends.winrt.client:closing requester
DEBUG:bleak.backends.winrt.client:closing session

[dxdate]

https://drive.google.com/file/d/1oy1qX4LAdwKY1Cy99h_JUNulIjL_4T3a/view?usp=sharing wireshark log

[dxdate]

@hbldh how fix this?

[dlech]

According to the logs, the disconnect happened because the device failed to respond.

So maybe the device is going to sleep after a while or something like that?