https://devzone.nordicsemi.com/f/nordic-q-a/17196/ble-uart-appFor ble_app_uart, if I write below routine to send data to mobile phone application. Can the mobile phone application receive all the packets without packet lose. for(i=0;i&lt;1000;i++) { ble_nus_string_send(&amp;m_nus, data_array, data_length); }en-USTelligent Community 13Thu, 20 Oct 2016 08:45:46 GMThttps://devzone.nordicsemi.com/thread/66059?ContentTypeID=1Thu, 20 Oct 2016 08:45:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:50aefd17-d24c-491f-b06f-ee4063c6a2a7run_ar<p>You should check the error message from ble_nus_string_send and make sure you call it again in case the buffers are full.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/66060?ContentTypeID=1Thu, 20 Oct 2016 08:06:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:46ea3307-da0e-43ba-b01d-68de6ca09069RichieJH<p>We use NUS to send thousands of data points to mobile phones without packet loss.</p><div style="clear:both;"></div>