https://devzone.nordicsemi.com/f/nordic-q-a/15787/unable-to-get-update-request-connection-parameter-while-setting-these-parameterHI all, I am setting these parameter as follow in my ble_app_template sample. #define MIN_CONN_INTERVAL MSEC_TO_UNITS(7.5, UNIT_1_25_MS) /**&lt; Minimum acceptable connection interval (0.5 seconds). */ #define MAX_CONN_INTERVAL MSEC_TO_UNITS(40, UNIT_1_25_MSen-USTelligent Community 13Wed, 17 Aug 2016 13:19:01 GMThttps://devzone.nordicsemi.com/thread/60247?ContentTypeID=1Wed, 17 Aug 2016 13:19:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:78aa12a0-d030-4bcc-95aa-7ed659cbe99bPetter Myhre<p><a href="https://devzone.nordicsemi.com/question/90948/conn_params_init-is-not-called-when-min_conn_interval75/">Duplicate</a></p><div style="clear:both;"></div>