https://devzone.nordicsemi.com/f/nordic-q-a/76522/nrf52840-sleep-mode-system-off-impossibleHello i have a keyboard with nrf52840 with ZMK firmware, BLE, adc, gpios, i2c0, usbd, DCDC and CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC When it is connected with the computer the power is 1.24mA +/-... is &quot;ok&quot;... but when it is in deep sleep the power isen-USTelligent Community 13Mon, 21 Jun 2021 17:07:42 GMThttps://devzone.nordicsemi.com/thread/316339?ContentTypeID=1Mon, 21 Jun 2021 17:07:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6fbb32f2-006c-4904-9979-d54b381ec1e3Miguelio<p>Hello thanks for the response,&nbsp;</p> <pre class="tw-data-text tw-text-large XcVN5d tw-ta" dir="ltr"><span class="Y2IQFc" lang="en">I had output pins set to pull down</span></pre> <pre class="tw-data-text tw-text-large XcVN5d tw-ta" id="tw-target-text" dir="ltr"><span class="Y2IQFc" lang="en">and that made me spend a lot of energy</span></pre><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/316265?ContentTypeID=1Mon, 21 Jun 2021 12:43:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5eca70fa-dcaa-44fb-9fcb-8199f985ea77Simon<p>Try setting CONFIG_SERIAL=n in the prj.conf of the main application (and in&nbsp;the as well child images if you got any).</p><div style="clear:both;"></div>