Problem with function client.write_gatt_char()

[Szymon-Gesicki]

• bleak version: 0.4.2
• Python version: 3.7
• Operating System: win 10

I am trying to communicate to device by bluetooth. I have the UUID, also I'm doing everything that you showed in issue #59 but no matter what I'm typing to 'data' in function client.write_gatt_char it shows me this type of error:
"Could not write value 'data' to characteristic"
I've tried bytes or bytearray, but everything ends with the same error.
I decided to comment this function. Unfortunately, the function callback has never been called.
My code:

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

async def run(address, loop, debug=False):
    log = logging.getLogger(__name__)
    if debug:
        import sys
        loop.set_debug(True)
        log.setLevel(logging.DEBUG)
        h = logging.StreamHandler(sys.stdout)
        h.setLevel(logging.DEBUG)
        log.addHandler(h)

    async with BleakClient(address, loop=loop) as client:
        x = await client.is_connected()
        log.info("Connected: {0}".format(x))
        write_value = bytearray([0xa0])
        rw_charac = uuid.UUID('49365E80-CF3A-11E1-9AB4-0002A5D5C51B')
        await client.get_services()
        await client.start_notify(rw_charac, callback)
        #await client.write_gatt_char(rw_charac, write_value, response=True)
        await asyncio.sleep(0.5, loop=loop)
        await client.stop_notify(rw_charac)

if __name__ == "__main__":
    address = "9D:1C:2D:D3:E6:85"
    loop = asyncio.get_event_loop()
    loop.run_until_complete(run(address, loop, True))

[Surgavery]

Hi Szymon-Gesicki,

I have similar problem when using version 0.4.2. I suggest you try to downgrade the bleak version to 0.4.0.

[Huygon]

How do you solve your problem @Szymon-Gesicki ? thanks in advance