https://devzone.nordicsemi.com/f/nordic-q-a/13290/issue-custom-boardHello, I’m working on my own custom board based on the nrf52832 (QFAABB). Here the schematic: I succeed to flash the board with the nrf52DK (PCA10036) via the debug out port (SDK : nRF52_SDK_0.9.1_3639cc9 and SD : s132_nrf52_1.0.0-3.alpha_softdeviceen-USTelligent Community 13Tue, 26 Apr 2016 15:23:10 GMThttps://devzone.nordicsemi.com/thread/50666?ContentTypeID=1Tue, 26 Apr 2016 15:23:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cd0ca64d-ae41-4f84-9bdf-834822503091Romain Plougoulm<p>Thanks for your answer, I found a solution for my issue. I bought a newer version of the nrf52DK and the ble_uart example works now on my custom board. I don’t understand why, probably a compatibility problem with my SoC.</p> <p>Best regards.</p> <p>RP</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/50665?ContentTypeID=1Mon, 18 Apr 2016 13:02:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e6b4a654-f972-4f76-afec-7b629f0b4eda&#216;yvind Karlsen<p>Hi,</p> <p>Does the advertising work in the ble_app_uart example?</p> <p>Are C61 and C60 = 2xC_L - 4 pF, where C_L is the load capacitance of the crystal found in its datasheet? (same for C56 and C57)</p> <p>If you have an oscilloscope test your crystals by having TIMER1 and RTC1 toggle GPIOs and observe that the output frequency is a clean multiple of the crystal.</p> <p>Do you have a spectrum analyzer, if so, what did you see when measuring the ble_app_beacon code? Frequency drifts indicate bad 32MHz clocks.</p> <p>What is the precision of your OSC2? If it is different from 20ppm you will have to change the line <code>SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_XTAL_20_PPM, NULL);</code>.</p> <p>Best regards,</p> <p>Øyvind</p><div style="clear:both;"></div>