https://devzone.nordicsemi.com/f/nordic-q-a/11774/trying-to-achive-max-data-rate-with-pca10028Hi, i have a NRF51-DK (nRF51822 - PCA10028) board and using SDKv10 with SoftDevice S110. I read everything i could find about this topic and i see people claiming data rate of at least 2KByte in worst case, but what i get is quite lower. I starteden-USTelligent Community 13Wed, 10 Feb 2016 19:51:38 GMThttps://devzone.nordicsemi.com/thread/44514?ContentTypeID=1Wed, 10 Feb 2016 19:51:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4c763185-c9f6-4b5d-893d-14f06ac4932aMatteo Fumagalli<p>Hi, didn&#39;t found any BLE_ERROR_NO_TX_PACKETS but doing:</p> <pre><code>while(ble_nus_string_send(&amp;m_nus, buffer_str, BUFFER_STR_SIZE) == NRF_SUCCESS) </code></pre> <p>Fixed the packet loss and i got around 1Kbyte, enough for me. Thanks.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/44513?ContentTypeID=1Mon, 08 Feb 2016 09:52:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:611445c3-3a8d-416f-b7aa-a2b139567d25run_ar<p>To speed up the transfer rate I would recommend that you fill the TX buffers between connection event. So instead of placing 4 packets per connection event, you should continue to send date a until you get the BLE_ERROR_NO_TX_PACKETS error. iOS supports up to 6 packets per connection event @ 30 ms intervals (note that I haven&#39;t tested the latest version).</p> <p>You can also try to get a faster connection interval (Note that we have seen that throughput has actually been reduced on some iOS versions doing this as the number of packets per connection event is/was reduced.) Try asking for min 12.5 - max 22.5 ms or min 15 - max 25 ms or something similar.</p><div style="clear:both;"></div>