https://devzone.nordicsemi.com/f/nordic-q-a/45020/how-to-configure-two-notifications-on-centralHi, I used &quot;ble_image_transfer&quot; sample code and can get the all the stuff I want and now I&#39;m implementing the central device for it, but somehow I always got the &quot;cccd_configure&quot; error when I tried to enable the 2nd notification. In &quot;ble_image_transferen-USTelligent Community 13Tue, 19 Mar 2019 18:24:06 GMThttps://devzone.nordicsemi.com/thread/177165?ContentTypeID=1Tue, 19 Mar 2019 18:24:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1b13e7d6-24ec-41ec-b000-9cfbeab12849Chienkai Shih<p>Thanks, it resolved my problem and the root cause is because of I didn&#39;t wait the response of enabling the 1st notification then directly enable the 2nd notification, that is why it failed. Many thanks.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/177080?ContentTypeID=1Tue, 19 Mar 2019 14:22:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6485cdaa-109d-4ed8-b2b9-d988f6a5345dJimmy Wong<p>I did the example central role of&nbsp;<span>ble_image_transfer_c (</span><a href="https://github.com/jimmywong2003/nrf5-packet-error-rate-measurement-on-ble-connection">https://github.com/jimmywong2003/nrf5-packet-error-rate-measurement-on-ble-connection</a>) .&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/177044?ContentTypeID=1Tue, 19 Mar 2019 13:33:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6ad10dc8-e403-4673-80c6-7b0ea34f42dfrun_ar<p>Hi,</p> <p>Are you using the correct handle when trying to enable the second notification? can you capture a sniffer trace so I can see what is happening on air?</p><div style="clear:both;"></div>