Low power empty project

RE: Low power empty project

Achim Kraus — Tue, 08 Oct 2024 03:41:41 GMT

:-) so the "nrf_modem_lib_init();" is still required.

RE: Low power empty project

dave — Tue, 08 Oct 2024 01:56:20 GMT

Found my answer in this thread

devzone.nordicsemi.com/.../nrf9160dk-current-consumption-measurement

RE: Low power empty project

dave — Sat, 05 Oct 2024 14:32:22 GMT

Thanks! I'll give this a try

RE: Low power empty project

Achim Kraus — Sat, 05 Oct 2024 14:30:33 GMT

OK, I see.

Not sure, if that is still up-to-date, but in the past,

Getting started with current measurements on the nRF9160

did a good job.

#include <modem/lte_lc.h>
void main(void)
{
 lte_lc_power_off();
 k_sleep(K_MSEC(1000));
 NRF_REGULATORS->SYSTEMOFF = 1;
}

The last time I used that required an additional call to "nrf_modem_lib_init();"

RE: Low power empty project

dave — Sat, 05 Oct 2024 14:13:15 GMT

Sorry, I should have clarified, I am sleeping in a loop in main

int main(void)
{

    while (true) {
        k_sleep(K_MSEC(100000));
    }
    return 0;
}

I am not using any peripherals right now and don't have them (or anything else) enabled in the prj.conf or the device tree. Do I need to configure them in the device tree for low power at this point?

What do you mean by suspend the uart? In the prj.conf, device tree, or application code?

RE: Low power empty project

Achim Kraus — Sat, 05 Oct 2024 05:34:22 GMT

> about 3.1mA (running from flash, not debugging)

Does "running" mean, the mcu runs in a busy loop? Then try to add sleeps, e.g "k_sleep(K_MSEC(1000));". That will sleep for a seconds. You may also need to suspend the UART (mainly the RX takes a couple of 100s µA). "Low Power" mainly means, "switch off" and "on" only when it's indicated, that there is something to do.