https://devzone.nordicsemi.com/f/nordic-q-a/4772/who-set-initial-connection-parameters-on-bleHello! I&#39;ve some doubt about set-up of initial parameters in a BLE connection, using S110. In ble_app_lbs I try to change the following macro definitions: MIN_CONN_INTERVAL=500ms, MAX_CONN_INTERVAL=500ms, SLAVE_LATENCY=7, CONN_SUP_TIMEOUT=4000msen-USTelligent Community 13Tue, 09 Dec 2014 15:44:00 GMThttps://devzone.nordicsemi.com/thread/16882?ContentTypeID=1Tue, 09 Dec 2014 15:44:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c0a4922e-00b8-4cda-8aa4-2660d48ca9a7Ulrich Myhre<p>The central decides the connection parameters I&#39;m afraid. The PPCP values set by sd_ble_gap_ppcp_set() updates some values in the GATT database that can later be read out by the central device <em>after</em> connecting. Even in connection parameter update (not to be confused with the new 4.1 feature) the peripheral only sends a request, and it is up to the central to decide what the parameters should update to.</p> <p>But - it is possible to put the connection interval in your advertisement data, see Core Spec Supplement v4 - Chapter 1.9. It will still be up to the central devices to actually use the advertised intervals, but you could save yourself a connection parameter update if it does. The &quot;Slave connection interval range&quot; will take 4 octets + flag + length, so 6 octets in total.</p><div style="clear:both;"></div>