https://devzone.nordicsemi.com/f/nordic-q-a/47511/problem-with-cccd-2902Hi I have a problem with receiving / transmitting a packet of characteristics with a descriptor 2902 (CCCD 2902). The principle of operation of my program is that the device on the peripheral side wakes up and falls asleep. At the time of waking upen-USTelligent Community 13Tue, 21 May 2019 08:28:44 GMThttps://devzone.nordicsemi.com/thread/188143?ContentTypeID=1Tue, 21 May 2019 08:28:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1d8ae01f-b39a-4dbf-8d93-1973dd0ce626Simonr<p>Hi</p> <p>It&#39;s really hard to see what is wrong from what info you have provided here. But I agree that it seems&nbsp;the problem&nbsp;is on the Android side. I suggest you ask on an <a href="https://developer.android.com/support">Android developer forum</a> instead, as people there are likely more experienced with Android products. Our area of expertise is the Nordic products, chips, SoftDevice and SDKs, and not Android devices.</p> <p>You should also be more specific on what you are trying to do and how you are doing it, as a Sniffer log with no knowledge on what the application is supposed to do is difficult to grasp.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>