https://devzone.nordicsemi.com/f/nordic-q-a/85737/nrf52840-sleep-mode-zephyrHello, I am trying to set system on mode in nrf52840 usb dongle. This mode switched automatically by idle task, when there is no thread running. There is no while(1) loop and i am using k_sleep(k_forever). I am using SWD debugger J-Link. Ien-USTelligent Community 13Mon, 14 Mar 2022 12:43:31 GMThttps://devzone.nordicsemi.com/thread/357945?ContentTypeID=1Mon, 14 Mar 2022 12:43:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9c833c4d-83b4-45b1-b4ed-9f8a6a71f4d8Kenneth<p>The nRF52840 USB dongle is nice for demo purposes , but for development I recommend getting a nRF52840-DK instead. Alternatively get an SEGGER j-link so you can program and debug the nRF52840 USB dongle with. In this case the 500uA may be caused by USB is active, serial port and/or debug active. So by using a DK or an external SEGGER j-link you have much better control over the firmware (e.g. there is no USB bootloader needed and you can power directly using VDD also during development and prototype testing).</p> <p>Kenneth</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/357757?ContentTypeID=1Fri, 11 Mar 2022 18:25:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5a64a9d0-2b74-4a41-bc04-0f804ec7ac78thanosPr<p>So there is other problem in my case. Do you have any example with system on mode?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/357744?ContentTypeID=1Fri, 11 Mar 2022 16:42:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b61c5a5e-5ed0-40bf-afc1-2d2bbd1f72a1Turbo J<p>Simplest way to disable debug mode is to just remove the <em>power</em>. Debug mode is disabled on power-up.</p><div style="clear:both;"></div>