BLE data received from nRF52832 are incorrect

[PKANNAN]

Hi, I am using nRF52832 module (GAP peripheral, GATT server) with ble_app_uart_pca10040_s112 application.

Also, I am using nRF connect app to test the data communication.

The data sent from the nRF connectivity chip is seen in nRF connect app, however the received data seen in app seems to be incorrect. i.e., same data is being sent for a regular period of time, but incorrect values are received randomly.

In the following example, received data 3 and data x are incorrect.

Data 1: 07-08-09-01-30-34-37-31-30-31-30-30-30-30-31-30-30-30-30-34

Data 2: 07-08-09-01-30-34-37-31-30-31-30-30-30-30-31-30-30-30-30-34

Data 3: 07-08-09-01-30-34-37-31-30-0A-30-30-30-30-31-30-30-30-30-34

Data 4: 07-08-09-01-30-34-37-31-30-31-30-30-30-30-31-30-30-30-30-34

:

Data x: 01-00-00-00-0C-00-00-00-01-00-00-00-02-00-00-00-57-8A-00-34

Data y: 07-08-09-01-30-34-37-31-30-31-30-30-30-30-31-30-30-30-30-34

I understand that this issue might be due to not handling the buffers in a proper way. But, since I don't have a debugger I am not able to trace it through code.

Please let me know what could be the actual cause for this problem and suggest what can be done. Thanks in advance.

[Kenneth]

Hello,

You will need to debug this one way or the other (e.g. using an nRF52-DK with SES), in this case the problem may be anywhere, it can be on the peer before data is sent, it can be the buffer handling the reception, or it can even be the output logging that display error.

Best regards,
Kenenth

[PKANNAN]

Hi, thank you for your response.

I managed to debug the transmission of incorrect data, but now I could see empty data getting received randomly.
After empty string, it resumes sending proper data. Why is this happening?