https://devzone.nordicsemi.com/f/nordic-q-a/50058/connection-issues-to-nrf52810I have created a custome board for the nrf52810 after having tested its functionality on the development kit. I have followed the reference schematics contained within the documentation for this device with all values matching those for the internalen-USTelligent Community 13Mon, 22 Jul 2019 08:23:11 GMThttps://devzone.nordicsemi.com/thread/199684?ContentTypeID=1Mon, 22 Jul 2019 08:23:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9b50a31f-df52-4915-b157-742c1e2e0739Simonr<p>Hi</p> <p>Yes, the crystal is absolutely likely to cause this issue, as this is necessary for the chip to work properly. Please mount the crystal specified in the reference design before using the chip, as it may be harmful to the chip itself using another crystal frequency than what&#39;s specified.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>