https://devzone.nordicsemi.com/f/nordic-q-a/53031/nrf52840-dongle-pin-issueI am experiencing an issue with the nRF52840 dongle and programming UART pins. First off, I have developed my application on the nRF52 DK and it works fine and now I am programming the application on the dongle and it also works fine for the most parten-USTelligent Community 13Wed, 09 Oct 2019 08:16:32 GMThttps://devzone.nordicsemi.com/thread/214061?ContentTypeID=1Wed, 09 Oct 2019 08:16:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6947e4ff-6fda-48e7-96e1-949e90153175haakonsh<p>My best bet is a blown ESD diode, as it is very common for an ESD diode to permanently short when blown, and a short between VDD and the UART pin could explain the symptoms.&nbsp;<br /><br />Also note that VBUS, VDD, GND, and the rest of the I/O pins&nbsp;can be at equal electrical potential when the dongle is laying on an ESD mat.&nbsp;</p><div style="clear:both;"></div>