https://devzone.nordicsemi.com/f/nordic-q-a/16007/what-should-i-do-hardware-flow-controlHello all I am trying to implement hardware flow control for UART. is there anything else to be done ? I have done the GPIO configurations like this const app_uart_comm_params_t comm_params = { KH_TX_PIN_NUMBER, /* P0.18 */ KH_RTS_PIN_NUMBERen-USTelligent Community 13Fri, 26 Aug 2016 08:27:25 GMThttps://devzone.nordicsemi.com/thread/61058?ContentTypeID=1Fri, 26 Aug 2016 08:27:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8c5ac95a-7ca1-4124-9f58-df072bbfb9ddSusheel Nuguru<p>Hi,</p> <p>That should be enough. If you are using DK remember that pin 17,18,19,20 are connected to LEDs on the board.</p> <blockquote> <p>Is it possible to use the GPIOs used for a UART interface?</p> </blockquote> <p>I did not quite understand this question. If you mean to ask if you can use the GPIOs used for UART for other purposes than UART, then the answer is you cannot use it while the UART is enabled.</p><div style="clear:both;"></div>