https://devzone.nordicsemi.com/f/nordic-q-a/21926/floating-uart-fails-the-deviceI have a custom nrf52832 board. I have changed the UART TX and RX pins to P0.3 and P0.4 respectively. If the pins are floating, then nrf52832 stops advertising,If something connected then there is no issue. Do I need to enable any pull up for these pinsen-USTelligent Community 13Wed, 10 May 2017 08:14:59 GMThttps://devzone.nordicsemi.com/thread/86085?ContentTypeID=1Wed, 10 May 2017 08:14:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a47440af-59dd-4c63-a132-e40856b031ccMartinBL<p>As @Turbo J said, pull-ups are worth a shot. It might not be necessary on the TX pin though. The reason why your advertising stops is probably because your application hits an error handler with a while(1) loop when the floating pins on the UART generates an error due to noise on the RX pin. If you don&#39;t use the UART you can also trace down this error check in your code and remove it.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/86084?ContentTypeID=1Tue, 09 May 2017 19:02:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9d82a3ed-fbdb-4d35-9f2c-4d1540826d70Turbo J<p>Enabling the internal pullup on the RX pin sounds like a good idea...</p><div style="clear:both;"></div>