https://devzone.nordicsemi.com/f/nordic-q-a/124303/sleep-mode-and-bluetooth-connectionHi: I&#39;ll be using the Raytac Bluetooth Module in my project. Imagine that the Bluetooth Module has a Bluetooth connection established with the smartphone (Android or iPhone). When the MCU (nRF52832 and nRF54L) enters System OFF ,Sleep mode, willen-USTelligent Community 13Thu, 11 Sep 2025 06:38:00 GMThttps://devzone.nordicsemi.com/thread/548432?ContentTypeID=1Thu, 11 Sep 2025 06:38:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:375dbfb8-8a8b-442c-b438-573113e3026bVidar Berg<p>Hi,</p> <p>The chip is powered down in System OFF and a wakeup will trigger a reset. Maintaining a BLE connection in this mode is not possible. Instead, I recommend&nbsp;checking if you can tune the connection parameters to meet your power target. To help with this, you can use our<span style="font-family:inherit;">&nbsp;</span>&nbsp;<a href="https://devzone.nordicsemi.com/power/w/opp/2/online-power-profiler-for-bluetooth-le">Online Power Profiler for Bluetooth LE</a>&nbsp;&nbsp;</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>