https://devzone.nordicsemi.com/f/nordic-q-a/4782/disconnect-fastHi, When pointer the p_conn_params of ble_conn_params_init_t to NULL for ble_comm_params_init(), the connection will be disconnected fast automatically, test with the heart rate demo of nRF-toolbox app. If pointer the p_conn_params to a conn_paramsen-USTelligent Community 13Tue, 16 Dec 2014 11:03:12 GMThttps://devzone.nordicsemi.com/thread/16933?ContentTypeID=1Tue, 16 Dec 2014 11:03:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:597c4780-cfd8-4637-b8ee-a297e299ef3eJason<p>Resolved. thanks</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/16932?ContentTypeID=1Tue, 16 Dec 2014 10:41:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3eade424-6ac9-47e6-a0e5-b2322ca4fdc7Petter Myhre<p>What SDK version are you using? Are you saying that a unmodified ble_app_hrs example disconnects?</p><div style="clear:both;"></div>