Reading battery information through adp536x PMIC in Thingy91

[Adeel]

Hi Dev team,

I have been working on a Thingy91and I was trying to read out the battery voltage of the device. 

I was able to do that through the modem using the MODEM_INFO library.

However, I would like to know how could I get the battery information through the adp536x PMIC. 

I tried to search in the adp536x.c file for any relevant functions but could not find any.

Is there any specific function available to read the battery information through the PMIC ?

Regards,

Adeel.

[Carl Richard]

Hi, Adeel!

I've asked the developers about this, but from what I can see it's not implemented. From reading the ADP5360 datasheet it seems like it shouldn't be too much of a challenge to add support for reading the VBAT_READ register. I suggest looking into the source code (adp536x.c) and using the already implemented adp536x_reg_read(...) function.

Best regards,
Carl Richard

[Adeel]

Hi Carl,

Thanks for the lead. I will try this and let you know .

Could you please let me know if you get any word from the developers ?

Regards,

Adeel.

[Carl Richard]

Hi, Adeel!

Did you call battery_monitor_init first? And did the compiler throw any build warnings/errors? I'll check if we have some more sample code!

Best regards,
Carl Richard

[Adeel]

Hi Carl,

Carl Richard said:

Did you call battery_monitor_init first?

Yes I called the battery_monitor_init() at the start and then tried calling the battery_monitor_read() function.

The compiler did not issue any warnings for the battery_monitor_init() function. It built fine.

I just wanted to see in which way the battery_monitor_read() function is called in the main function.

Regards,

Adeel.

[Carl Richard]

Hi again!

I've attached a old version of the asset_tracker, using the battery monitor. You can have a look at that, but it should be enough to initialize and read. You could try to experiment with the parameters defined in battery_monitor.c and see if they give you better results? I see that the default configuration only samples charge every 16 minutes when charging.

asset_tracker_old_with_battery_monitor.zip

Best regards,
Carl Richard

[Adeel]

Hi Carl,

Thanks, but I could not find the attachment of the asset tracker old version. Could you send it once again. 

Regards,

Adeel.

[Carl Richard]

Hi again!

My apologies. It's attached correctly now!

Best regards,
Carl Richard