Battery Status Empty

[ashrind]

Any thoughts as to why my battery status might not be filling in? Running on a 722, changed the battery when I started with Loop last night

[loudnate]

This is a know issue with the x22 pumps. @jlucasvt has started documenting the time-voltage curve for a lithium battery. I'm hoping someone can do the same for an alkaline as well.

[ashrind]

@loudnate Thanks for the answer!

[jlucasvt]

I'm finally committed to gathering Alkaline data. Should have it mapped out in about a week.

[tomasboudr]

Awesome that this is getting some love! Always wondered why the battery was blank since you could see the voltage in pump status on a x22.

[jlucasvt]

Alkaline and Lithium Battery data.

https://docs.google.com/spreadsheets/d/19FpO5YO5ewQrdph_4iIXuear6xRGzl-AYTiFeHwPcVk/edit?usp=sharing

[loudnate]

Very awesome!

[loudnate]

@jlucasvt my personal recommendation would be to expose a voltage-to-percentage remaining function on the PumpModel enum in MinimedKit, in the rileylink_ios repo.

[jlucasvt]

Yes if we use the linear eq's it should be pretty simple. I I did do a quick run with excel to generate a 4th Ord Polynomial Eq for both but they may be a bit overboard..

[loudnate]

Ideally there is no user setting for choosing their battery type.

[tomasboudr]

I agree with you nate, ideally - but if its tricky to detect in software, you have to realize its a switch that will be used very rarely. I would rather time be spent on other things and there be a switch.

[jlucasvt]

Yeah , My one touch ping made you choose on battery swap (ALK or LITH). It will be ideal to not worry about the battery type.

In the past I wired this up in the DeviceDataManager.assertCurrentPumpData just after battery state is retrieved and before NSUpload.

if let sentrySupported = self.pumpState?.pumpModel?.larger , !sentrySupported {
     self.setBatteryStatusforNonMySentryPumps(voltage: status.batteryVolts)
}

I am going to start here and and then will need some guidance on the next steps

[scottleibrand]

We could certainly make is a 3-way selection: unspecified, alkaline, or lithium. If unspecified (default) we use an average decay curve that does something reasonable for both. If specified, we can be more accurate...

[jlucasvt]

Updated to latest v1.1 Loop Code Testing this week and will do a PR.

https://github.com/jlucasvt/Loop/tree/master-1.1-x22BatteryStatus