https://devzone.nordicsemi.com/f/nordic-q-a/7215/nrf51422-usb-dongle-latency-speedWe&#39;re sending packets from a nRF51422 usb dongle to a nRF51422 dev board running some modified Nordic UART example code. We send 100kB of data over the connection to work out the speed, at the moment we get about 500 B/s. A C# app on the computer continuallyen-USTelligent Community 13Tue, 26 May 2015 09:20:41 GMThttps://devzone.nordicsemi.com/thread/25486?ContentTypeID=1Tue, 26 May 2015 09:20:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:97907343-0054-4411-903b-a20055ab4e34Hung Bui<p>@William: I&#39;m testing here with the PCA10031 dongle on PC and the PCA10028 as peer device running ble_app_uart example in SDK v8.1. The dongle using firmware MEFW 0.11.0. I&#39;m seeing the default connection interval was 20ms and there are 2 packet were sent per connection event, giving the speed of 2kB per second. It could be faster with the lower connection interval. Attached is the trace.</p> <p><a href="https://devzone.nordicsemi.com/cfs-file/__key/communityserver-discussions-components-files/4/testUART.pcapng">testUART.pcapng</a></p> <p>Which board and chip version were you testing? Have you used the MEFW v0.11.0 ?</p><div style="clear:both;"></div>