Problem in Code porting from nrf51 to nrf52: nrf52 automatically disconnects after few seconds

RE: Problem in Code porting from nrf51 to nrf52: nrf52 automatically disconnects after few seconds

Hung Bui — Tue, 10 Jan 2017 11:31:19 GMT

Please try to catch a sniffer trace. You only need a nRF51 DK or dongle to use as the backend.

BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION telling it's disconnected from the other end.

Have you used NRF_LOG_ERROR in your code ? Have you included all the modules and dependency ? You need to init the logger also. Please get familiar with it first on an example in the SDK v12.

RE: Problem in Code porting from nrf51 to nrf52: nrf52 automatically disconnects after few seconds

Anjali — Tue, 10 Jan 2017 09:35:57 GMT

I had forgotten to replace the startup files of nrf51, which I have done currently. After these changes, I am observing desired output, but it is not consistent. My device is still getting discoonected a lot of times. As you suggested, if I find out the reason of disconnection, it shows:

BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION

And I am not able to see the prints from NRF_LOG_ERROR. I referred the post from:

devzone.nordicsemi.com/.../

But I did not see any logs

RE: Problem in Code porting from nrf51 to nrf52: nrf52 automatically disconnects after few seconds

Hung Bui — Mon, 09 Jan 2017 13:41:54 GMT

About the sniffer, you can have a look here.

For debugging, please look for BLE_GAP_EVT_DISCONNECTED event, usually it's handled in on_ble_evt() in main.c. And you can check the reason in p_ble_evt->gap_evt.disconnected.reason.

Please make sure there is no assertion.

RE: Problem in Code porting from nrf51 to nrf52: nrf52 automatically disconnects after few seconds

Anjali — Mon, 09 Jan 2017 03:18:17 GMT

hello Hung Bui, I found a link on infocenter which highlights the steps needed: infocenter.nordicsemi.com/index.jsp I am currently verifying if all these steps are followed. Please tell me how to capture sniffer logs? Also I am new to debugging, How should I trace the reason of disconnecting?

RE: Problem in Code porting from nrf51 to nrf52: nrf52 automatically disconnects after few seconds

Hung Bui — Thu, 05 Jan 2017 09:47:30 GMT

Hi Anjali,

Please check if there is any assertion (check the app error handler ) causing the chip to reset. If there is no error, please check the disconnect reason when the DISCONNECTED even occurs.

Also please capture a sniffer trace so we can check which side terminate the connection.

RE: Problem in Code porting from nrf51 to nrf52: nrf52 automatically disconnects after few seconds

Anjali — Wed, 04 Jan 2017 10:34:31 GMT

After posting this question, I also found out sdk_config.h was according to the old nrf51 code, which I changed according to nrf52. But I am observing the same behaviour