High Power Consumption Openthread CLI Sample

RE: High Power Consumption Openthread CLI Sample

Marte Myrvold — Thu, 09 Nov 2023 17:25:50 GMT

Hi,

I built for secure (nrf5340dk_nrf5340_cpuapp). If you are building for nonsecure then your current spikes could be related to TFM logging. You can disable TFM logging by setting CONFIG_TFM_LOG_LEVEL_SILENCE=y.

Best regards,
Marte

RE: High Power Consumption Openthread CLI Sample

hugzy123 — Thu, 09 Nov 2023 09:04:52 GMT

Hi Marte,

Thanks for providing your test setup and power consumption results.

Can I just check, were you using the _ns build? I've seen this forum post could be relevant, the TFM logging takes about 40uA which could be causing our issue.

RE: High Power Consumption Openthread CLI Sample

Marte Myrvold — Wed, 08 Nov 2023 12:01:37 GMT

Hi,

I ran some tests on Monday and also today. On Monday I saw around 4-5 uA sleep current when testing with nRF Connect SDK v2.3.0 and v2.4.2, but today with SSED and v2.5.0 I see around 2 uA sleep current and around 21 uA average consumption.

Here is my setup, it is the same as in Measuring current in Source Meter mode:

PPK	DK
VOUT	P22 VDD_nRF
GND	P21

CLI commands:

ot channel 17
Done

ot panid 0xabcd
Done

ot networkkey 00112233445566778899aabbccddeeff
Done

ot mode n
Done

ot csl period 1000000
Done

ot csl timeout 20
Done

ot childsupervision interval 0
Done

ot childsupervision checktimeout 0
Done

ot ipaddr mleid
fdde:ad00:beef:0:6337:777f:d7a6:85f8
Done

ot ifconfig up
Done

ot thread start
Done

I see that you have a lot of small spikes during sleep in your measurement. It could be due to noise affecting the measurement.

Please try with the setup above and see if you still get the small spikes.

I have also attached my log from the Power Profiler so you can compare.

devzone.nordicsemi.com/.../ppk_2D00_20231108_2D00_openthread_2D00_cli_2D00_ssed.ppk

Best regards,
Marte

RE: High Power Consumption Openthread CLI Sample

hugzy123 — Tue, 07 Nov 2023 10:44:53 GMT

Hi Marte,

Thanks for the reply.

In our previous test we measured the DUT in source meter mode, where vdd was supplied directly from the PPK2, the secondary DK was only used to connect uart to the PC .How can we measure in source meter mode with usb connected?

We tried following the instructions in the blog post for SSED but we got a similar sleep base current ~45uA (see attached image)

We've also seen similar results on our custom board. Do you know if the nRF53DK using an openthread example has had any power consumption tests by nordic? If so, would it be possible to share the test set up used so we can try to replicate it?

RE: High Power Consumption Openthread CLI Sample

Marte Myrvold — Mon, 06 Nov 2023 11:59:25 GMT

Hi,

[quote user=""]Our testing show an average current of approximately 58uA, in contrast to Nordic's 2.9uA[/quote]

Please note that 2.9 uA is not the average total power consumption, but the average sleep current, and the 2.9 uA number is for the nRF52840 DK.
However, your sleep current is still very high with more than 40 uA. I would expect it to be more around 4-5 uA on the nRF5340 DK.

Do you see the same power consumption if you connect the DUT directly to the PC with USB instead of via a secondary DK?

Please also check out this blog post Analyzing power consumption in Thread Sleepy End Devices and try the steps there.

Best regards,
Marte

RE: High Power Consumption Openthread CLI Sample

Kenneth — Mon, 06 Nov 2023 08:29:15 GMT

Hello,

I will see if we can get someone to measure on this during the week for the nRF5340.

Kenneth

RE: High Power Consumption Openthread CLI Sample

hugzy123 — Fri, 03 Nov 2023 10:46:59 GMT

Hi Kenneth,

Thanks for your reply.

We're using the standard nRF5340 dts files for the DK test, what changes do you recommend we make to see if the GPIO events are causing any issue? As far as i'm aware, the openthread CLI example doesn't use any GPIO interrupts.

Do you know what configuration and dts files Nordic used for their low power results?

RE: High Power Consumption Openthread CLI Sample

Kenneth — Thu, 02 Nov 2023 13:49:49 GMT

Hello,

I have a hunch this is related to the following:
https://devzone.nordicsemi.com/f/nordic-q-a/85119/nrf9160-lis2dw12-high-current-consumption/356705

Kenneth