https://devzone.nordicsemi.com/f/nordic-q-a/74187/cannot-find-bluetooth-signal-in-mobile-in-external-handmade-fpcb-with-nrf52832I&#39;ve made a handmade external Bluetooth FPCB with nrf52832. I uploaded code with NRF DK board and checked that it is uploaded. So the circuit does not have any problem. And also I&#39;ve checked that it works well in Hard PCB like below. But in myen-USTelligent Community 13Tue, 20 Apr 2021 14:07:08 GMThttps://devzone.nordicsemi.com/thread/305896?ContentTypeID=1Tue, 20 Apr 2021 14:07:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5e6127a0-50d6-4976-b0db-9edae63e4a21ketiljo<p>Most probably, the RF performance will be low on both your designs since you don&#39;t have ground plane on both sides. It doesn&#39;t work will routing ground with tracks. You need to connect all grounded components to the ground plane. The top and bottom ground planes must be have vias to connect them firmly together. Like this:&nbsp;<a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/ref_circuitry.html#layout">https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/ref_circuitry.html#layout</a></p> <p>But you should be able to get at least a very short range. What&#39;s the spec of your crystal and the values of the load caps you&#39;re using?</p> <p></p><div style="clear:both;"></div>