https://devzone.nordicsemi.com/f/nordic-q-a/68531/question-about-uart-transfer-bufferSo, I am developing an application where I will use uart to transmit some data from the PC to the nrf board. The issue is that the data I am transferring is quite large (64KB). I have written a code that would work in terms of communication, but I seriouslyen-USTelligent Community 13Thu, 19 Nov 2020 13:28:25 GMThttps://devzone.nordicsemi.com/thread/280910?ContentTypeID=1Thu, 19 Nov 2020 13:28:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2079b307-903c-4626-abce-47f62787d66eSimonr<p>The only thing limiting the buffer sizes are the available RAM in your device, but usually 256 is sufficient for both TX and RX buffers. You say that you have a suspicion that some data is lost, are you not able to see what you send and receive and make sure that these match in content and size?</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/280748?ContentTypeID=1Thu, 19 Nov 2020 06:08:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c2f33f23-4f56-473f-b3ba-0d76997e7d73Jinyue Zhu<p>As a follow up, the baudrate I am using is 115200. On the PC end, the pyserial library is used to communicate with nRF through uart. Specifically, I am loading the data as a byte array (of size 64KB) and that gets send through uart by the function pyserial.write().</p> <p></p> <p>I am wondering what&#39;s the maximum buffer size allowed for Rx and Tx. Or should I slow down the baud rate? For now, it seems like when I am transmitting large sized data, the board cannot handle them in time and thus data were lost in the process. Thanks</p><div style="clear:both;"></div>