https://devzone.nordicsemi.com/f/nordic-q-a/14978/how-can-i-get-connection-parameters-from-ble-central-s-in-the-connection-processI use a android phone as central(Master) and use a nrf51822 as a peripheral(Slave). The peripheral can send the &quot;L2CAP Connection Parameter Update Request&quot; to change the central&#39;s connection parameters in the connection state, but the &quot;L2CAP Connectionen-USTelligent Community 13Mon, 11 Jul 2016 01:52:46 GMThttps://devzone.nordicsemi.com/thread/57149?ContentTypeID=1Mon, 11 Jul 2016 01:52:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2c441a41-12cc-4870-89c0-e2221e73a6f7ICM_Mobile<p>Thanks for your reply.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/57148?ContentTypeID=1Wed, 06 Jul 2016 10:10:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a5841021-b378-4651-901e-f5de3ca0a079Stefan Birnir Sverrisson<p>Hi</p> <p>These two threads should give some pointers <a href="https://devzone.nordicsemi.com/question/2898/knowing-the-connection-interval/">[1]</a> <a href="https://devzone.nordicsemi.com/question/23190/whats-the-actual-connection-interval-used/?answer=23294#post-id-23294">[2]</a>. The connection parameter update procedure is described <a href="https://devzone.nordicsemi.com/question/12545/update-connection-parameter-programmatically/">here</a>.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/57146?ContentTypeID=1Wed, 06 Jul 2016 06:17:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bc36e683-b33c-45d0-861a-59da8cd189a1ICM_Mobile<p>Locky , Thanks for your reply. I will try it.</p> <p>Does anyone have any idea how to get the central&#39;s Connection Parameters in the connection state ?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/57147?ContentTypeID=1Wed, 06 Jul 2016 02:30:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:28a62de2-ca8d-4cdd-8424-a8b9a1e7abb3Locky<p>Follow the Apple BLE Connection Parameter Guidelines. These should never be rejected by an Android central.</p><div style="clear:both;"></div>