ble app uart peripheral does not automatically reconnect to central after disconnection

RE: ble app uart peripheral does not automatically reconnect to central after disconnection

awneil — Thu, 03 Oct 2019 10:19:37 GMT

So have you looked at line 200 in app_button.c:?

No doubt, there will be an APP_ERROR_CHECK there - and that is catching an error code returned by some function call.

Find what that error code is - that will tell you what's wrong ...

https://devzone.nordicsemi.com/f/nordic-q-a/52662/getting-hardfault-handler-after-porting-latest-nrf_sdk_15-3-0-to-nrf52840/212216#212216

RE: ble app uart peripheral does not automatically reconnect to central after disconnection

vigneshms — Thu, 03 Oct 2019 09:52:06 GMT

Hi awneil

Upon further debugging, I get the following error code which prevents the central to start scanning:

<error> app: ERROR 3735928559 [Unknown error code] at C:\nRF5_SDK_15.3.0_59ac345\components\libraries\button\app_button.c:200
PC at: 0x0002CD53
<error> app: End of error report

Any help in this regard would be highly appreciated.

RE: ble app uart peripheral does not automatically reconnect to central after disconnection

awneil — Thu, 03 Oct 2019 07:47:17 GMT

[quote userid="78626" url="~/f/nordic-q-a/52835/ble-app-uart-peripheral-does-not-automatically-reconnect-to-central-after-disconnection"]a connection could not be established. However, if I do a hard reset on the central node, it reconnects to the peripherals. [/quote]

So, clearly, you are not properly/completely "clearing-up" after the connection drops - so your system is not (quite) back to the correct state to accept new connections.

You need to compare what happen for a first-time connection with what happens after a disconnect - see where they're different, and what prevents the re connection.

You will probably need to use Monitor Mode Debugging (to avoid crashing the SoftDevice):

https://devzone.nordicsemi.com/f/nordic-q-a/48647/ble-debugging-on-nrf52/193088#193088

RE: ble app uart peripheral does not automatically reconnect to central after disconnection

vigneshms — Thu, 03 Oct 2019 04:41:35 GMT

awneil Edvin your thoughts in this regard?