https://devzone.nordicsemi.com/f/nordic-q-a/17463/nrf52832-connetct-timeFrom the SDK ,We can find this: #define MIN_CONN_INTERVAL MSEC_TO_UNITS(20, UNIT_1_25_MS) //20 /**&lt; Minimum acceptable connection interval (20 ms), Connection interval uses 1.25 ms units. */ The least amount of connection time is 25ms , isen-USTelligent Community 13Wed, 02 Nov 2016 08:20:16 GMThttps://devzone.nordicsemi.com/thread/67103?ContentTypeID=1Wed, 02 Nov 2016 08:20:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c63d2f17-57e5-4f81-aa43-9de7685a90b0Sigurd<p>Yes, you can set the minimum connection interval to 10 ms like this:</p> <pre><code>#define MIN_CONN_INTERVAL MSEC_TO_UNITS(10, UNIT_1_25_MS) //10 ms </code></pre> <p>The SoftDevice support an connection interval in the range <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v12.0.0/structble__advdata__conn__int__t.html?resultof=%22%63%6f%6e%6e%65%63%74%69%6f%6e%22%20%22%63%6f%6e%6e%65%63%74%22%20%22%69%6e%74%65%72%76%61%6c%22%20%22%69%6e%74%65%72%76%22%20">7.5ms to 4s</a>.</p><div style="clear:both;"></div>