Battery Status Empty about loop

[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...

[tomasboudr]

That looks good! Nice work.

[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

[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

[jlucasvt]

Doing some testing now with battery and alerts. It's working pretty good.

x22 Battery Inidication

Lithium Enable Switch

[ashrind]

This is awesome!

[jlucasvt]

I have rebuilt the UI to allow selection of Alkaline or Lithium and a description explaining the difference for the user. I've made all the requested changes from my last PR and hopefully it will be accepted this time. Here is the current source it's based on dev 1.1.1

https://github.com/jlucasvt/Loop/tree/dev-1.1.1-x22BatteryStatus

[ps2]

More lithium battery history:

[tomasboudr]

This is working... One minor note though is that in practice with normal Duracell (alkalines) my battery has lasted 30-40% (ballpark) longer than loop's current algorithm predicts. I have had it warm me for 0% and the pump still had 2/4 bars on the battery meter.