The speed is low and the connection is not stable

[BarrelTitor]

• bleak version:0.19.1
• Python version:3.8.13
• Operating System: Win10

Description
I try to use bleak to connect NRF5340 on Win10 under the speed of 300kbps. Although connection is built successfully sometimes, the speed of data transmission is about 10-20kbps and disconnection will occur in several seconds. Here is my code.

import asyncio
from bleak import discover
from bleak import BleakClient
target_addr = "E9:75:B4:20:82:11"
data_t = []

async def main():
    global target_addr
    devices = await discover()
    if target_addr != "":
        async with BleakClient(target_addr) as client:
            print(client.mtu_size)
            print(f"Connected: {client.is_connected}")
            svcs = await client.get_services()
            print("Services:")
            for service in svcs:
                print(service)
                for service in svcs:
                    print(service)
                    for char in service.characteristics:
                        print(char)
            await client.start_notify(17, notification_handler)
            await asyncio.sleep(30)
            await client.stop_notify(17)

def notification_handler(sender, data):
    """Simple notification handler which prints the data received."""
    pass

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

[dlech]

Have you tried logging Bluetooth packets to see what is going on there? Have you tried profiling the Python code to see if there are any bottlenecks?