https://devzone.nordicsemi.com/f/nordic-q-a/81083/advertisement-duration-limited-to-0xffff-millisecondsHi team, When we set fast advertisement timeout (uint32_t ble_adv_fast_timeout; /**&lt; Time-out (in units of 10ms) for fast advertising. */) to a value greater than 0xFFFF, the adv duration is actually set to the time = ble_adv_fast_timeout % 0xFFFF.en-USTelligent Community 13Thu, 28 Oct 2021 13:17:51 GMThttps://devzone.nordicsemi.com/thread/336501?ContentTypeID=1Thu, 28 Oct 2021 13:17:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:08ac07fe-2d12-4882-a5ec-f48671607988sboudaud<p>Thx for the response.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/336405?ContentTypeID=1Thu, 28 Oct 2021 10:22:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0c3af27c-71b5-40e2-a691-6e440c15b67bSusheel Nuguru<p>Hi,</p> <p>unfortunately the internal structures inside the softdevice that store duration are also uint16_t so changing this to uint32_t in the application will not have any results in this. I am not sure why this is limited to unt16_t but for not this seems to be a limitation without a workaround in the app. If you need a longer advertising duration, you can set the duration to 0 (unlimited) and use an internal timer to stop the advertiser after certain duration in the application.</p><div style="clear:both;"></div>