https://devzone.nordicsemi.com/f/nordic-q-a/14031/how-to-send-two-packets-of-dataHi! I have asked a question in this topic ( devzone.nordicsemi.com/.../) and now I can send one packet of 20bytes. What I cannot do is sending two packets at the same time, because what I see is that my beacon sends two packets separately. My applicationen-USTelligent Community 13Tue, 24 May 2016 10:13:42 GMThttps://devzone.nordicsemi.com/thread/53647?ContentTypeID=1Tue, 24 May 2016 10:13:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0bf9c3df-0bd6-4918-aad1-a6bf69f6e256Petter Myhre<p>First both calls return BLE_ERROR_GATTS_SYS_ATTR_MISSING? Then both return NRF_SUCCESS?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/53648?ContentTypeID=1Tue, 24 May 2016 09:23:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:df83fb71-7ac4-4766-8d74-366769de6398Francesca<p>I have checked the returned error of sd_ble_gatts_hvx() and the first time that it sends the data returns <code>BLE_ERROR_GATTS_SYS_ATTR_MISSING</code>, the other times it returns <code>NRF_SUCCESS</code>...Can this be the reason why it doesn&#39;t send the two packets together?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/53649?ContentTypeID=1Mon, 23 May 2016 15:14:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e5aded29-5a81-4fa0-9ebd-122a183143a9Francesca<p>Ok I&#39;ll check! Thank you!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/53652?ContentTypeID=1Mon, 23 May 2016 15:08:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c7b3aff3-4433-4721-8bc9-79a7f681a95bPetter Myhre<p>Android should support more than 1 packet per connection interval. I think you code should work, but could you check the returned error codes of sd_ble_gatts_hvx()? They should be 0x00000000 (NRF_SUCCESS).</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/53651?ContentTypeID=1Mon, 23 May 2016 15:03:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:343f33da-8c72-4d7b-9c14-51e9b3827688Francesca<p>For the moment I have used the app for Android on my phone and there I see each packet every 20ms...So if I use the nrf51 DK as central it should support two packets per connection?the code that I&#39;m using for sending them from the beacon is correct?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/53650?ContentTypeID=1Mon, 23 May 2016 14:41:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a873bfb4-150c-4e0d-abdc-1219f863caeePetter Myhre<p>What central device are you connecting to? It may not support more than one packet per connection interval.</p><div style="clear:both;"></div>