Issue with sending BLE packets (Frame is out of any "connection handle" session)

[fatburg3r]

• bleak version: 0.20.2
• Python version: 3.11.4
• Operating System: Windows 10
• BlueZ version (bluetoothctl -v) in case of Linux:

Description

I wanted to establish a connection between my computer and the Arduino Nano 33 BLE, the computer will send data to the board through a characteristic from a service. For testing purposes, I sent a single byte (0x05), the connection between my computer and the board was successful, but I couldn't get the data (0x05) from the board. So I tried observing the Bluetooth packets using Wireshark. The packet seems to contain the data, however, it says

frame is out of any "connection handle" session

any idea what this means?

What I Did

This is the python script for my computer.

from bleak import BleakClient
from bleak import BleakScanner
import asyncio

data_UUID = "e64179d5-f617-4618-99b5-9433f2d934f1"

data = bytearray([0x05])

async def setData(client):
    await client.write_gatt_char(data_UUID, data)

async def run():
    found = False
    devices = await BleakScanner.discover()
    for device in devices:
        if "Arduino Nano 33 BLE" in device.name:
            print("Found Arduino Nano 33 BLE")
            found = True

            async with BleakClient(device.address) as client:
                print(f"Connected to address: {device.address}")

                while True:
                    await setData(client)

    if not found:
        print("Could not find Arduino Nano 33 BLE")

asyncio.run(run())

Logs

No.     Time           Source                Destination           Protocol Length Info
      1 0.000000       controller            host                  HCI_EVT  8      Rcvd Number of Completed Packets

Frame 1: 8 bytes on wire (64 bits), 8 bytes captured (64 bits) on interface [email protected]:24352, id 0
Bluetooth
Bluetooth HCI H4
    [Direction: Rcvd (0x01)]
    HCI Packet Type: HCI Event (0x04)
Bluetooth HCI Event - Number of Completed Packets

No.     Time           Source                Destination           Protocol Length Info
      2 0.000033       localhost ()          remote ()             ATT      13     Sent Write Command, Handle: 0x000c (Unknown)

Frame 2: 13 bytes on wire (104 bits), 13 bytes captured (104 bits) on interface [email protected]:24352, id 0
Bluetooth
Bluetooth HCI H4
    [Direction: Sent (0x00)]
    HCI Packet Type: ACL Data (0x02)
Bluetooth HCI ACL Packet
    .... 1110 0000 0001 = Connection Handle: 0xe01
    ..00 .... .... .... = PB Flag: First Non-automatically Flushable Packet (0)
    00.. .... .... .... = BC Flag: Point-To-Point (0)
    Data Total Length: 8
    Data
    [Expert Info (Error/Protocol): Frame is out of any "connection handle" session]
    [Source BD_ADDR: 00:00:00_00:00:00 (00:00:00:00:00:00)]
    [Source Device Name: ]
    [Source Role: Unknown (0)]
    [Destination BD_ADDR: 00:00:00_00:00:00 (00:00:00:00:00:00)]
    [Destination Device Name: ]
    [Destination Role: Unknown (0)]
    [Current Mode: Unknown (-1)]
Bluetooth L2CAP Protocol
Bluetooth Attribute Protocol

No.     Time           Source                Destination           Protocol Length Info
      3 0.000700       controller            host                  HCI_EVT  8      Rcvd Number of Completed Packets

Frame 3: 8 bytes on wire (64 bits), 8 bytes captured (64 bits) on interface [email protected]:24352, id 0
Bluetooth
Bluetooth HCI H4
    [Direction: Rcvd (0x01)]
    HCI Packet Type: HCI Event (0x04)
Bluetooth HCI Event - Number of Completed Packets

No.     Time           Source                Destination           Protocol Length Info
      4 0.000716       localhost ()          remote ()             ATT      13     Sent Write Command, Handle: 0x000c (Unknown)

Frame 4: 13 bytes on wire (104 bits), 13 bytes captured (104 bits) on interface [email protected]:24352, id 0
Bluetooth
Bluetooth HCI H4
    [Direction: Sent (0x00)]
    HCI Packet Type: ACL Data (0x02)
Bluetooth HCI ACL Packet
    .... 1110 0000 0001 = Connection Handle: 0xe01
    ..00 .... .... .... = PB Flag: First Non-automatically Flushable Packet (0)
    00.. .... .... .... = BC Flag: Point-To-Point (0)
    Data Total Length: 8
    Data
    [Expert Info (Error/Protocol): Frame is out of any "connection handle" session]
    [Source BD_ADDR: 00:00:00_00:00:00 (00:00:00:00:00:00)]
    [Source Device Name: ]
    [Source Role: Unknown (0)]
    [Destination BD_ADDR: 00:00:00_00:00:00 (00:00:00:00:00:00)]
    [Destination Device Name: ]
    [Destination Role: Unknown (0)]
    [Current Mode: Unknown (-1)]
Bluetooth L2CAP Protocol
Bluetooth Attribute Protocol

Here are the logs in .txt file for a better view.
logs.txt

[dlech]

any idea what this means?

This is not an error. It just means the Wireshark capture was not started until after the connection was made so it couldn't link it back to a specific connection event.

[fatburg3r]

Oh ok, thanks for the fast reply