Immediate Disconnection with NUS - Error Code 23 (Collision) When Using Python/Rust as Central

RE: Immediate Disconnection with NUS - Error Code 23 (Collision) When Using Python/Rust as Central

Hung Bui — Thu, 22 Aug 2024 08:23:49 GMT

Hi Noble,
"Rcvd Error Response - Attribute Not Found, Handle: 0x0009 (Unknown)." usually is fine. It's just a part of the service discovery process. It shouldn't cause a disconnection.
Please try capture a sniffer trace using a DK so we can take a look.

RE: Immediate Disconnection with NUS - Error Code 23 (Collision) When Using Python/Rust as Central

Noble — Wed, 21 Aug 2024 21:00:24 GMT

Hello Hung,

I encountered an issue today where I did not have access to the DK for the sniffer. Instead, I used the Wireshark USBP Cap and received the following error: "Rcvd Error Response - Attribute Not Found, Handle: 0x0009 (Unknown)." To troubleshoot, I switched to Linux and found that the setup works fine there as well as on the nRF Connect app. However, the issue persists on Windows. (Also, yes HCI code for Collision, BT_HCI_ERR_LL_PROC_COLLISION)

RE: Immediate Disconnection with NUS - Error Code 23 (Collision) When Using Python/Rust as Central

Hung Bui — Wed, 21 Aug 2024 12:18:15 GMT

Hi Noble,
Have you tried to use the Nordic sniffer to debug ?

If you are not familiar with the sniffer, I would suggest to take part in the Bluetooth Fundamental course in our Academy:
https://academy.nordicsemi.com/courses/bluetooth-low-energy-fundamentals/lessons/lesson-6-bluetooth-le-sniffer/

Error code 23 you mean 0x23 HCI code for Transaction Collision ?

Make sure you don't have previously bonded with the nRF52 on the Python/Rust machine.

RE: Immediate Disconnection with NUS - Error Code 23 (Collision) When Using Python/Rust as Central

Noble — Tue, 20 Aug 2024 19:48:34 GMT

Bluetooth: Peripheral NUS — Zephyr Project Documentation *fixed link