https://devzone.nordicsemi.com/f/nordic-q-a/84256/nrf52840-system-on-low-power-modeHello, I am new in nordic previously I was working on Cypress controllers. I am trying to put the device in System ON Low power mode. I have tried the below functions but there is not any effect on current consumption. To make sure it will alwaysen-USTelligent Community 13Tue, 01 Feb 2022 11:31:45 GMThttps://devzone.nordicsemi.com/thread/350639?ContentTypeID=1Tue, 01 Feb 2022 11:31:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9c7881f5-76f0-4786-8e01-5450f7c36630Vidar Berg<p>Hello,</p> <p>The high sleep current is&nbsp; likely caused by the serial logging interface (UART) being enabled. Please try to disable it in your project by adding CONFIG_SERIAL=n to your prj.conf file.</p> <p>Also, k_cpu_idle() is normally not used it the application code as we have the idle thread (<a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.8.0/zephyr/reference/kernel/other/cpu_idle.html">CPU Idling</a>) that gets executed whenever there are no pending tasks left.</p> <p>Regards,</p> <p>Vidar</p><div style="clear:both;"></div>