NRF9160 High current consumption eDRX idle.

RE: NRF9160 High current consumption eDRX idle.

lumdeveloper — Fri, 12 Apr 2024 15:20:34 GMT

So it was a configuration error and these configs are the solution. It seems that I had failed to configure it correctly on mcuboot + my config were overwritten by ns.conf. I located the wrong configs from combined .conf file. Now my power consumption is all good. Thank you.

RE: NRF9160 High current consumption eDRX idle.

Achim Kraus — Fri, 12 Apr 2024 10:04:25 GMT

[quote userid="133032" url="~/f/nordic-q-a/110153/nrf9160-high-current-consumption-edrx-idle/478513"]I can achieve low power when using .hex provided by your link. [/quote]

OK, that verifies, that your DK is not broken.

[quote userid="133032" url="~/f/nordic-q-a/110153/nrf9160-high-current-consumption-edrx-idle/478513"]However I need to run edrx and keep the modem active and I still have no luck with that same weird-shaped consumption is still present. I can't use PSM.[/quote]

The nRF9160 comes with a couple of configurations, which may have influence on that. e.g. "%XDATAPRFL". It may be also the case, that your application is causing some consumption, maybe by "polling" or things as that.

RE: NRF9160 High current consumption eDRX idle.

lumdeveloper — Fri, 12 Apr 2024 09:44:58 GMT

Thanks for your help. I can achieve low power when using .hex provided by your link. However I need to run edrx and keep the modem active and I still have no luck with that same weird-shaped consumption is still present. I can't use PSM.

RE: NRF9160 High current consumption eDRX idle.

Achim Kraus — Fri, 12 Apr 2024 06:35:29 GMT

Some years ago, the starting point for power measuring was Getting started with current measurements on the nRF9160 which in my case helped a lot. I'm not sure, if that is still working. I use in the meantime a slightly adapted version.

main.c:

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

int main(void)
{
 nrf_modem_lib_init();
 lte_lc_power_off();
 k_sleep(K_MSEC(1000));
 NRF_REGULATORS->SYSTEMOFF = 1;
 return 0;
}

prj.conf:

CONFIG_LTE_LINK_CONTROL=y
CONFIG_NRF_MODEM_LIB=y
CONFIG_LOG=n

(without modem library I'm not sure, if the modem still starts on it's own.)

RE: NRF9160 High current consumption eDRX idle.

lumdeveloper — Thu, 11 Apr 2024 16:41:11 GMT

Unfortunately no, I tried all the following related to logging and tracing:

CONFIG_LOG=n

CONFIG_NRF_MODEM_LIB_TRACE=n

CONFIG_NRF_MODEM_LIB_TRACE_BACKEND_UART=n

CONFIG_NRF_MODEM_LIB_TRACE_BACKEND_UART_ZEPHYR=n

CONFIG_SERIAL=n

CONFIG_UART_ASYNC_API=n

CONFIG_UART_1_ASYNC=n

Maybe I have to think way to somehow separate modem CPU and application CPU consumption to make sure it is modem drawing the current. I just don't know a good way just yet. I continue reading and wait for further responses. Thank you anyway.

RE: NRF9160 High current consumption eDRX idle.

Didrik Rokhaug — Thu, 11 Apr 2024 15:03:54 GMT

[quote user="lumdeveloper"] I have indeed tried to set[/quote]

And that didn't help with the power consumption I assume?

I forgot to point out that if you have modem tracing enabled, you must disable that as well with CONFIG_NRF_MODEM_LIB_TRACE=n.

RE: NRF9160 High current consumption eDRX idle.

lumdeveloper — Thu, 11 Apr 2024 14:32:10 GMT

Thanks for pointing that out, I have indeed tried to set:

CONFIG_LOG=n

CONFIG_SERIAL=n

RE: NRF9160 High current consumption eDRX idle.

Didrik Rokhaug — Thu, 11 Apr 2024 14:30:54 GMT

Hi,

Is the UART running?

If so, can you try to disable it with CONFIG_SERIAL=n?

Best regards,

Didrik