https://devzone.nordicsemi.com/f/nordic-q-a/14705/bringing-the-bootloader-into-deep-sleepHello, I`m using more or less the Nordic OTA bootloader implementation. There is a timeout that forces the bootloader to reset, if no action happens. Because we have an battery supplied device, I want to bring the bootloader into deep sleep withen-USTelligent Community 13Fri, 24 Jun 2016 12:57:12 GMThttps://devzone.nordicsemi.com/thread/56105?ContentTypeID=1Fri, 24 Jun 2016 12:57:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:23b94f19-7691-4386-b77d-a57d45611ea0Anders Strand<p>The only thing i can thing of that is on, is the RAM. Have you set up some RAM retention?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/56104?ContentTypeID=1Fri, 24 Jun 2016 09:44:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f60ccdfa-84a2-4f04-96a2-86d54a3fafdfAndreas<p>Because I am searching for the module, that draws the last 20µA, is it needed to uninitialize/close the pstorage module, hci_mem_pool, or the scheduler in any way before doing sd_power_system_off()?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/56103?ContentTypeID=1Fri, 24 Jun 2016 07:12:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:33b9d1a8-def9-4f6f-ae73-acaa1cb85b83Andreas<p>Good morning. I am still working on that issue. As I mentioned, I am now down at ~20µA with sd_power_system_off(). Is there any possibility to check which modules are running? There must be something, causing this current. In my final application I also use sd_power_system_off(). And I come down to ~2µA.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/56102?ContentTypeID=1Thu, 23 Jun 2016 13:42:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9002940e-27d5-4823-83b9-04f65cdb65fcAndreas<p>nRF51822 AC</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/56101?ContentTypeID=1Thu, 23 Jun 2016 12:45:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0fb20619-d8c0-425d-95cd-cfbade87cc4fAnders Strand<p>What chip are you using?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/56099?ContentTypeID=1Thu, 23 Jun 2016 11:16:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:60eead8c-5865-4178-af2d-ce5532bda455Andreas<p>Hello Anders, thanks for your reply. I now come down to ~20µA. Big improvement, but still to much...</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/56100?ContentTypeID=1Thu, 23 Jun 2016 09:29:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a33682dc-3f50-4df0-b3f0-7c1b8cad1154Anders Strand<p>Can you check the return code of sd_power_system_off? If you are in debug mode, the function will return and the cpu will be awake.</p><div style="clear:both;"></div>