Sleep power consumption in Matter samples with SED/SSED

[JulNeu2332]

Hallo everyone,

I'm currently trying to reduce power consumption in Matter samples (ncs v2.3.0) with as SED or SSED. I tried to do everything described in this article: 

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/protocols/matter/getting_started/low_power_configuration.html

I use the prj_release.conf which already enables the Power Management module.

I also added code to suspend the external flash in AppTask::Init  , however I did not see any difference in power consumption.

I would expect 2-4µA while sleeping, but I cant get it any lower then ~210 µA, which is way to much for a CR2032 powered Device.

Is there any other peripheral or configuration I'm missing?

Thanks,
Julius

[Kazi Afroza Sultana]

Hello Julius,

Could you please tell which sample/application you are running on your DK to measure the power consumption?

Thanks.

BR

Kazi

[JulNeu2332]

Hello Kazi,

I tried it with sample/matter/template on the nrf5340dk. Today I built the exact same Matter template for the nrf52840dk and it worked much better:

So im 99% sure it has something to do with the network core not going to sleep. I saw in an other post, that you should CONFIG_LOG=n in child_image/hci_rpmsg/prj_release.conf.

I haven't tried that yet, because in my build folder: build/multiprotocol_rpmsg/zephyr/.config   it already has " # CONFIG_LOG is not set " 

Are there more settings for the network core the reduce power consumption? 

Thanks,

Julius

[Kazi Afroza Sultana]

Hello Julius,

Can you try to set CONFIG_SERIAL =n in the hci_rpmsg child image as well?

[JulNeu2332]

Hi Kazi,

We tried this setting, it did not work. We still can't get the average power consumption while sleeping below ~ 100 µA.

If we can't get the current blow ~5 µA we won't be able use the nrf5340 for our battery-powered Matter remote. Are there any settings/options missing we need to enable?

We are already familiar with the methods listed here: developer.nordicsemi.com/.../low_power_configuration.html

Thanks for your help.