https://devzone.nordicsemi.com/f/nordic-q-a/28012/nrf52840-uart-connection-problemsDear support team, I’m using nrf52840 with PCA10056 and SDK 14.1. I have problems of UART connection. I do believe that MCU has physical connections to nrf52840 GPIO pins of P0.05, P0.06, P0.07 and P0.08, which are used to UART connection betweenen-USTelligent Community 13Fri, 08 Dec 2017 05:25:55 GMThttps://devzone.nordicsemi.com/thread/110451?ContentTypeID=1Fri, 08 Dec 2017 05:25:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2a95a70d-7fc4-46da-af35-7dda1dbc186aLiu Tengfei<p>Great! Martin, thanks a lot for your quick response!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/110450?ContentTypeID=1Thu, 07 Dec 2017 12:16:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:718e43e7-c024-4f14-8bde-f7d16de8fb81MartinBL<p>It sounds like you have got it all right.</p> <ol> <li>Yes. You can download the HW files here to see how it all connects: <a href="https://www.nordicsemi.com/eng/Products/nRF52840-Preview-DK#Downloads">nRF52840 Preview DK Downloads</a></li> <li>Yes</li> <li>Yes</li> <li>If you want to make a BLE application I would suggest that you start with the ble_app_uart example. If you are just playing around with peripherals without BLE, I suppose the peripheral\uart example would be best. The peripheral UART example in SDK 14.2.0 also uses FIFO.</li> </ol><div style="clear:both;"></div>