RE: Power Consumption AWS IOT sample nrf9160DK

Håkon Alseth — Thu, 24 Mar 2022 12:16:10 GMT

Hi,

[quote user=""] I'm currently using the aws_iot sample available as a baseline for my project, but i noticed that power consumption are really high using the sample application as it is, also enabling CONFIG_PM=y in prj.conf. Since UART in this example is largely used for debug purposes, is it better to start from a clean AT client sample application to achieve the best possible power performance adding one by one all that i need? Do i have take care of something else?[/quote]

If UART is only used for debugging purposes, you can disable serial and redo your current consumption testing.

You want to disable it in all child-images as well as your application.

Create the folder and file my-application/child_image/spm.conf

Try placing "CONFIG_SERIAL=n" in prj.conf and in the above spm.conf.

If you also use MCUBoot, you should create the file child_image/mcuboot.conf with "CONFIG_SERIAL=n" as well.

[quote user=""]The result is that i'm not able to build the application because "pm_device_state_set is __deprecated" . Is there any guide to follow that could help me?[/quote]

The power management API was reworked from zephyr v2.7. You should use the API as indicated in the documentation:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.9.1/zephyr/reference/pm/index.html#c.pm_device_state_set

Ie. this function:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.9.1/zephyr/reference/pm/index.html#group__subsys__pm__device_1ga3840d6e7832a00b93763247a5951bfde

Kind regards,

Håkon