nRF51822 QFAA resets when connecting to it

[PabloGC]

As the title says, I'm having problems connecting to my device with my custom board and I don't know what else to do. This is my Layout:

Whenever I upload my firmware to the nRF Kit it works perfectly, the chip is able to receive the data and it doesn't disconnect. The behaviour that I'm observing while trying to connect with my custom board (Malapascua) is the next:

And this is with the nRF Kit:

So the dBms are more or less the same but still, I don't understand why my custom board is sometimes reseting or not responding at all whenever a device tries to connect to it. The only difference I see is that my custom board is using a nRF51822 QFAA and the Kit is using a nRF51422 QFAC.

Thank you, Pablo. 

[endnode]

Hi Pablo,

Your description is little confusing: is your "custom" board running GAP Peripheral role and you connect to it from your phone with nRF Connect app? Or is it GAP Central and it tries to connect to another BLE device (GAP Peripheral) which is Nordic Dev Kit? Also what FWs you run on the devices? Finally have you done any debugging on the embedded side? Like having UART logging and see what SD call returns unexpected error code, if it is asserted in your FW and you reset the board from FW or is it some total hard fault going from Soft Device? There are many things you can (and actually should) do before going further here on the forum...

[PabloGC]

Your description is little confusing: is your "custom" board running GAP Peripheral role and you connect to it from your phone with nRF Connect app?

- Yes, I connect with my phone to my custom board;

Also what FWs you run on the devices?

   - A modified version of BLE_APP_HRS. The FW works properly when upload to Nordic Dev Kit (this means that my phone can connect and receive correct data from NDK);

Like having UART logging and see what SD call returns unexpected error code, if it is asserted in your FW and you reset the board from FW or is it some total hard fault going from Soft Device?

  - I'm debugging with a LED. The reset occurs whenever the phone connects to the board. This part of the code should be a black box provided by the examples from Nordic (didn't touch anything from here or the handler that manages the connection protocols);