nrf modem library - documentation of setting the battery low level

RE: nrf modem library - documentation of setting the battery low level

Øyvind — Tue, 17 Jun 2025 08:20:59 GMT

Hello Stefan,

Just want to let you know that the PR has been merged into our main branch.

If you see any further issues with the change, please let us know.

Kind regards,
Øyvind

RE: nrf modem library - documentation of setting the battery low level

Stefan Schmidt — Mon, 16 Jun 2025 08:08:52 GMT

Hi Øyvind,

thank you for your quick response. I will change it and I am sure it will work. Thank you for initiating a PR for this.

Regards

Stefan

RE: nrf modem library - documentation of setting the battery low level

Øyvind — Mon, 16 Jun 2025 08:04:31 GMT

Hello Stefan Schmidt , this seems to be a misconfiguration in the modem battery library. Have reported and a PR has been made for this.

Basically, in nrf\lib\modem_battery\Kconfig it states:

config MODEM_BATTERY_LOW_LEVEL
    int "Modem battery low level voltage threshold (mV)"
    range 3100 3500
    default 3300

The range should be 3100 to 5000. Could you edit this and test on your side?

Thanks.

Kind regards,
Øyvind

RE: nrf modem library - documentation of setting the battery low level

Øyvind — Fri, 13 Jun 2025 11:40:17 GMT

Hello Stefan,

That was unexpected. I will check internally one more time and find the what exactly is correct.

I hope to have an answer by end of Monday.

Kind regards,
Øyvind

RE: nrf modem library - documentation of setting the battery low level

Stefan Schmidt — Fri, 13 Jun 2025 08:21:28 GMT

Hi Øyvind,

I have to come back to this topic. I just noticed that setting CONFIG_MODEM_BATTERY_LOW_LEVEL=3750

in my prj.conf did not work. Looking at https://github.com/nrfconnect/sdk-nrf/blob/main/lib/modem_battery/Kconfig I see this here:

config MODEM_BATTERY_LOW_LEVEL
int "Modem battery low level voltage threshold (mV)"
range 3100 3500
default 3300

So it is not possible to set the level to something above 3500

Thanks

Stefan

RE: nrf modem library - documentation of setting the battery low level

Stefan Schmidt — Tue, 25 Mar 2025 14:38:53 GMT

Hi Øyvind,

thanks a lot for triggering the clarification.

Best regards

Stefan

RE: nrf modem library - documentation of setting the battery low level

Øyvind — Tue, 25 Mar 2025 09:38:22 GMT

Hi Stefan,

I'm informed that what is written in the AT command guide is in line with actual implementation. Technical Documentation
<battery_level> Integer, 3100–5000 mV. Factory default 3300 mV.

[quote user=""]battery low level, default range is 3100 mV to 3500 mV[/quote]

This seems to be a typo and I have forwarded to our technical publications to verify.

The notification for battery low level can be requested in the range of 3100–5000 mV.

Kind regards,
Øyvind

RE: nrf modem library - documentation of setting the battery low level

Øyvind — Sun, 23 Mar 2025 13:51:38 GMT

Hello Stefan,

Yes, this was somewhat difficult to understand, I will need to inquire our technical publications to verify the value and function.

Kind regards,
Øyvind