power consumption in nrf52840?

[RAGHAV_M]

i need information on power consumption during advertising and connection in my case its taking too much high current around 1 ma in advertising and 1.5 ma during connection . i tried enabling dcdc convertor i tried disabling serial but not much improvement and in idle state its taking around 30 micro amps can u please help me to resolve this issue? i am using sdk 2.6.0 and zephyr application.

[RAGHAV_M]

Hi simonr,

i tried it but there is no reduction in current consumption

in idle state it is 35 micro amps

in advertising its ~1 ma

in connection it is ~1ma

and i am working on custom board but i tried in nrf52840 both showing same results

[RAGHAV_M]

HI simonr,

can u provide any update regarding the query?

thank you

[Simonr]

Hi

Sorry about the late response, but there was a couple of bank holidays here in Norway, so we've not been available the last few days.

RAGHAV_M said:

but i tried in nrf52840 both showing same results

I assume this means you tried with an nRF52840 DK, correct?

How exactly are you measuring current consumption on your end, are you using a PPK2 or some other way of measuring power? 35µA doesn't sound too bad, but it should be possible to lower the current further I believe. You can use the Devicetree visual editor extension for VS code to see if there are any peripherals or clocks still running. My guess would be that an RTC instance might be left running for some reason, but I'm not able to tell from the configs you've provided unfortunately.

The advertising and connection consumption seems about right, depending on what advertising and connection parameters are set in your application.

Best regards,

Simon

[RAGHAV_M]

Hi simonr,

thanks for the reply,

I assume this means you tried with an nRF52840 DK, correct?

yes.

i am not using ppk2, i am using digital ammeter serial connection to check power consumption.

i am not using rtc so i dont think it could effect.

and i already Devicetree visual editor extension for VS code nothing is running.

[Simonr]

Okay, can you please show me a picture of how the amp-meter is connected to the DK and/or custom board? Also, do you have the specs of the amp-meter? How accurate is it for example, and is there a few µA it could swing when measuring?

Best regards,

Simon