https://devzone.nordicsemi.com/f/nordic-q-a/46990/ble_app_uart-transmisson-rateHello, I send 32 bytes of data in 4 milliseconds via UART. Peripheral sends this to ble_app_uart_c for a certain period of time. But after a very short time there is fatal error. When I increase the time to 5 ms, it can send a lot more packagesen-USTelligent Community 13Tue, 07 May 2019 10:31:02 GMThttps://devzone.nordicsemi.com/thread/185680?ContentTypeID=1Tue, 07 May 2019 10:31:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a5422c89-1502-4e7d-807a-20f4361ff3bcEinar Thorsrud<p>Hi,</p> <p>Yes. The lowest connection interval in BLE is 7.5 ms, so you cannot transmit data more often then that.&nbsp; However, you can transmit multiple packets in a single events and longer packets, so you can achieve the same throughput as you would have if you could send 32 bytes every 3.8 ms.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/185638?ContentTypeID=1Tue, 07 May 2019 08:19:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:274d23af-dfdd-426c-882c-9f440a13673aomerKayten<p>Is it normal that I can&#39;t send 32 bytes in every 3.8 milliseconds?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/185584?ContentTypeID=1Tue, 07 May 2019 00:34:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:049367c1-0eb2-4495-8dd3-80f21bcc6e66Jimmy Wong<p>You can refer to the example (<a href="https://github.com/jimmywong2003/nrf5-packet-error-rate-measurement-on-ble-connection">https://github.com/jimmywong2003/nrf5-packet-error-rate-measurement-on-ble-connection</a>).<br /><br /></p><div style="clear:both;"></div>