https://devzone.nordicsemi.com/f/nordic-q-a/19442/nrf51dk-disable-transmissionI am using the ble_app_uart on the nrf51dk.RX is always enabled.I want to enable TX when data is to be transmitted and then disable it again. I am using NRF_UART0-&gt;TASKS_STOPTX = 1; to disable transmission. But when i use NRF_UART0-&gt;TASKS_STARTTXen-USTelligent Community 13Fri, 03 Feb 2017 13:24:33 GMThttps://devzone.nordicsemi.com/thread/75521?ContentTypeID=1Fri, 03 Feb 2017 13:24:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:254115f5-8c5b-4384-a974-15ae0238756aFormerMember<p>ble_app_uart uses the UART module (app_uart) for the UART communication. The UART module uses the UART driver, nrf_drv_uart.</p> <p>When I test the bare UART example in the &quot;peripheral&quot; folder, which also uses the UART module, it seems like writing directly to the register to doesn&#39;t work..</p> <p>However, calling nrf_drv_uart_tx_abort() should stop TX, and nrf_drv_uart_tx() should start TX. To call the nrf_drv_uart_xx functions, you will need the instance structure (or a pointer to it). I haven&#39;t tested it, but it&#39;s worth a try.</p><div style="clear:both;"></div>