Chettimada, Vinayak Kariappa
A btmon log would help identify the reason for disconnection.
> the connection parameter update still fails but even minutes later I am still connected to the remote device.
This is weird, the cypress dongle did not perform connection parameter update, update procedure on air only either succeeds or disconnects (unless it’s a connection parameter request procedure that is rejected by peer).
From: Jamie Mccrae <Jamie.Mccrae@...>
Sent: 06 March 2020 08:43
To: Chettimada, Vinayak Kariappa <vinayak.kariappa.chettimada@...>; Cufi, Carles <Carles.Cufi@...>; mayank7117@...; devel@...
Subject: RE: [Zephyr-devel] hci interface stopped working after few hours #ble #hci #nrf52480 #uart
I gave it a try this morning with the latest master build of zephyr using the HCI_USB on an nrf52840_pca10059 dongle and I don’t get the errors/timeout issues as I save previously when I tested, however, GATT is unusable from bluetoothctl on linux (BlueZ 5.50). With the zephyr dongle, the device connects, seems to fail a connection parameter updates and disconnects – I am unable to list any details from the GATT server on the remote device (nothing comes through automatically and in the gatt menu, list-attributes seemingly does nothing). In comparison with a non-zephyr (cypress) based USB HCI dongle, it connects and instantly lists the GATT table, the connection parameter update still fails but even minutes later I am still connected to the remote device.
When I tested previously with a UART, it was with flow hardware control wired up to the FTDI chip. If zephyr was set to use it or not I cannot recall (it would have been the default for the HCI_UART example).
THIS MESSAGE, ANY ATTACHMENT(S), AND THE INFORMATION CONTAINED HEREIN MAY BE PROPRIETARY TO LAIRD CONNECTIVITY, INC. AND/OR ANOTHER PARTY, AND MAY FURTHER BE INTENDED TO BE KEPT CONFIDENTIAL. IF YOU ARE NOT THE INTENDED RECIPIENT, PLEASE DELETE THE EMAIL AND ANY ATTACHMENTS, AND IMMEDIATELY NOTIFY THE SENDER BY RETURN EMAIL. THIS MESSAGE AND ITS CONTENTS ARE THE PROPERTY OF LAIRD CONNECTIVITY, INC. AND MAY NOT BE REPRODUCED OR USED WITHOUT THE EXPRESS WRITTEN CONSENT OF LAIRD CONNECTIVITY, INC.