https://devzone.nordicsemi.com/f/nordic-q-a/69183/inconsistent-sleep-current-draw-60ua---140ua-should-be-2-5ua-on-custom-external-board-nrf52810-caaaHey all, I have been working on some custom boards using nRF52810-CAAA chips. I use SDK version 15.2. I had some previous issues with sleep currents as seen here , but I resolved them. I have made many versions of custom PCBs, and since resolving my previousen-USTelligent Community 13Wed, 09 Dec 2020 03:09:31 GMThttps://devzone.nordicsemi.com/thread/283939?ContentTypeID=1Wed, 09 Dec 2020 03:09:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:14c1f785-cbee-48bc-b5b7-aaa79366ee6dNoah<p>Ah, this was the problem. I should first disable all my GPIO before sleep/advertising. While the board is in &quot;data sending mode&quot;, the GPIOs are properly enabled/disabled. But it looks like when I go to advertising or sleep, I forgot to fully disable them again. Good catch!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/283606?ContentTypeID=1Mon, 07 Dec 2020 14:53:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4c458eb6-4c0f-4573-b26a-4ab4ebb3cc4bJ&#248;rgen Holmefjord<p>Hi,</p> <p>From the current range, it could sound like a floating GPIO pulling current through a pull resistor, etc.</p> <p>Do you have any external pull resistors connected to any GPIOs?</p> <p>Do I understand you correctly that the current goes away when reading the sensors? Which sensors is this? Do you uninitialize the sensors when disconnecting?</p> <p>If you could post the output from the GPIO registers along with a schematic of the board, this may help with figuring out what is causing the current draw.</p> <p>Best regards,<br />Jørgen</p><div style="clear:both;"></div>