https://devzone.nordicsemi.com/f/nordic-q-a/69511/can-t-discover-nrf52832Hi. We have a debug board for the NRF52832. The breadboard on this board is working fine. But if NRF52832 is used outside the debug board, then for some reason, some phones cannot detect the device. The firmware for both boards is exactly the same.en-USTelligent Community 13Tue, 15 Dec 2020 13:55:03 GMThttps://devzone.nordicsemi.com/thread/285103?ContentTypeID=1Tue, 15 Dec 2020 13:55:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7dd947ff-1451-4f34-8893-51a81d62c841Bikti<p>Thanks for the answer. We have already fixed the problem by taking a crystal resonator from the debug board. Your answer is correct.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/285034?ContentTypeID=1Tue, 15 Dec 2020 11:40:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:61da06b8-8ec9-4dc6-ba14-39fd014e472eSimonr<p>Hello</p> <p>This sounds like an issue caused by a bad/mismatched 32MHz crystal on the custom board(s), as different mobile processors have different requirements for how accurate the frequency is for them to pick up the signal properly. Can you provide a schematic of your nRF52832 showing how the 32MHz crystal is connected in particular, the capacitors you are using here, as well as the datasheet of the 32MHz crystal you&#39;re using.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>