https://devzone.nordicsemi.com/f/nordic-q-a/119342/uart-communication-is-interruptedRegarding the operation of EJ2832AA1 (nRF52832), Please answer the following questions. nRF5 SDK ： v15.3.0 SoftDevice ： S132 v6.1.1 I am doing UART communication with another external microcontroller. When doing so, we call the API “app_uart_put” abouten-USTelligent Community 13Mon, 10 Mar 2025 02:29:11 GMThttps://devzone.nordicsemi.com/thread/526464?ContentTypeID=1Mon, 10 Mar 2025 02:29:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1b9174d3-beb0-48a9-9861-23711ea5141atakashina hiroki<p>I understood the content of the answer.<br />Thanks for your response.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/524918?ContentTypeID=1Wed, 26 Feb 2025 18:12:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:44b7076f-50c9-4ba7-8ab6-ecef49675099Vidar Berg<p>Hello,</p> <p>The app_uart library can only send one byte at a time, so any interrupt that preempts your send function may cause pauses in the transfer. To avoid this, you can use the driver directly and utilize larger DMA buffers (each transmit buffer can be a max. of 256 bytes on the nRF52832).</p> <p>Driver documentation:&nbsp;<a href="https://docs.nordicsemi.com/bundle/sdk_nrf5_v17.1.0/page/hardware_driver_uart.html">UART</a></p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>