nRF9160DK current consumption measurement.

RE: nRF9160DK current consumption measurement.

Roman Veselskyi — Wed, 02 Oct 2024 08:59:16 GMT

Yes, now it is working like should. Thanks.

RE: nRF9160DK current consumption measurement.

Håkon Alseth — Tue, 01 Oct 2024 12:58:43 GMT

Hi,

Thank you for sharing such a detailed howto.

Could you try to add this line before entering the while-loop?

nrf_modem_lib_init();

The whole program will then look like this:

#include <zephyr/kernel.h>
#include <modem/lte_lc.h>
#include <modem/nrf_modem_lib.h>

int main(void)

{
	nrf_modem_lib_init();
	while (1)
	{
		int ret = lte_lc_offline();
		k_sleep(K_MSEC(1000));
		NRF_REGULATORS->SYSTEMOFF = 1;
	}
	return 0;
}

Kind regards,

Håkon

RE: nRF9160DK current consumption measurement.

Roman Veselskyi — Tue, 01 Oct 2024 11:15:44 GMT

Hi Hakon,

I prepared the video of the test, please check.
devzone.nordicsemi.com/.../2024_2D00_10_2D00_01-14_2D00_02_2D00_31.mp4

The issue is that my code works only if I flash it after precompiled .hex file from the guide and only till the power cycle.

RE: nRF9160DK current consumption measurement.

Håkon Alseth — Tue, 01 Oct 2024 10:21:22 GMT

Hi,

[quote user=""]Then I flashed back the samples I created, and consumption is the same 1.6uA till the moment I completely remove power, disconnect the USB, and reconnect everything, the current increases back to 2.86mA. To bring it back down to 1.6µA, I need to flash the DK again only with precompiled .hex from guide. This is a black box for me now.
[/quote]

Do I understand correctly when your sample can go down to 1.6 uA, but will go into a high consumption state after a power cycle?

Could you share how you connect the power, and where you measure the current? Note that there are capacitances on the kit itself, so it is important that you let the board itself power down to 0V before power cycling.

Kind regards,

Håkon