https://devzone.nordicsemi.com/f/nordic-q-a/28438/how-to-send-data-with-high-speedHi I was use example ble_app_uart with SDK 12.3.0 and nrf51802 for a data transport, after BLE connection, the example need uart receive more than 20 or &quot;\r\n&quot; ,the data will send to the peer device; I want to know how to send the data without need &quot;en-USTelligent Community 13Thu, 06 Jul 2017 10:31:10 GMThttps://devzone.nordicsemi.com/thread/112331?ContentTypeID=1Thu, 06 Jul 2017 10:31:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b2012316-c52e-4010-b9c0-9ca4d8195f85endnode<p>Well define your condition and fire the transport anytime you need. It can be e.g. at 20B or lower if some timer expires (100ms/1s/10s). In the end it will be you who will need to write it into the FW anyway, nothing will save you from that work I&#39;m afraid...</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/112330?ContentTypeID=1Thu, 06 Jul 2017 02:11:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:748ddfbc-9dd7-4404-a34b-286adb5d062cMrFine<p>Thanks for your reply,Maybe I didn&#39;t make that clear; I want use the example like a real serial port line; I don<code>t want any end of frame to trigger; so for a high-efficient transpotr if uart receive 20 or more , I can send it immediately, buf if less than 20 , I don</code>t know when to send them.do you have a good solution for this?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/112329?ContentTypeID=1Wed, 05 Jul 2017 20:36:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2dd2875f-ad19-4e76-a226-e355da077752endnode<p>You can modify <code>ble_app_aurt</code> easily to trigger different &quot;end of frame&quot; condition then \r\n and similar you can play with the &quot;frame&quot; size of 20B (chaining them in some way if you need to send more).</p><div style="clear:both;"></div>