https://devzone.nordicsemi.com/f/nordic-q-a/17385/nrf52-advertising-packets-not-detected-by-centralI made a custom board with the nRF52+SDK11.0.0+s132. The firmware is based on the ble_hrs example (modified to fit my board and modified the application, but the basic premise of powering on and advertising is the same). After BLE advertising starts,en-USTelligent Community 13Sat, 10 Dec 2016 17:58:39 GMThttps://devzone.nordicsemi.com/thread/66838?ContentTypeID=1Sat, 10 Dec 2016 17:58:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:14715b0a-99ff-4818-a34b-d7e12089f641Tosa<p>closing out this thread. It was a bad board.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/66837?ContentTypeID=1Fri, 28 Oct 2016 13:53:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c02aa6a6-e9c3-4876-8e36-2c717dfd0c22FormerMember<p>Do you have a nRF52-DK? If so, I would recommend you to check/test your firmware there.</p> <p>If the firmware works on the nRF52-DK, you can check the value of the load capacitors, C1 and C2 for the 32 MHz crystal. The value of the load capacitors should be approximately: C_1 = C_2 = 2*C_l -4, C_l is the load capacitance of the crystal. The value of the load capacitors affect the frequency of the crystal, and hence, the transmit frequency.</p> <p>If the value of C_1 and C_2 is okay, could you upload the schematic and layout? If you want the schematic and layout to be kept secret, you can create a support case from nordicsemi.com and refer to this thread.</p><div style="clear:both;"></div>