Problem with SensorHistory.getHeartRateHistory and SDK versions

If you look at the api doc for SensorHistory (2.2.1 version) you'll see:

Since:
2.1.0
Supported Devices:
Forerunner 735xt
fenix Chronos
Vivoactive HR

Earlier doc still had "Since 2.1.0" but IIRC listed the F3-hr, when the F3-hr was a 1.3 device, so that doc was incorrect. So what's happening for you is what's supposed to happen - you're trying to make the call on a device that doesn't support the call (the f3-hr) and if you change the min version to 2.x, you can't build for any devices that are only 1.x

But what you can do is use ActivityMonitor.getHeartRateHistory(), as that's supported on all devices with Wrist based HR.. starting with 1.2 devices For it you see:

Since:
1.2.1
Supported Devices:
Forerunner 235/735xt
fenix 3 HR
D2 Bravo Titanium
Vivoactive HR

So, you want to leave the CIQ version at the default, and then you can build for the f3-hr, but use the version of getHeartRateHisory() in ActivityMonitor instead of the one in SensorHistory.

But, if you try to build for the f3 instead of the f3-hr, you'll still get an error, as the call is supported on the f3-hr and not the f3.

What you can do is check if it's available on the target you're running on with something like:

hasHR=(ActivityMonitor has :HeartRateIterator) ? true : false;

and then only call ActivityMonitory.getHeartRateHistory() on devices where "hasHR" is true.

and then only call ActivityMonitory.getHeartRateHistory() on devices where "hasHR" is true.

Thanks a lot for excellent support.

I'm afraid I need to ask for a little bit more help.

I have now made the following code:

var heartRateHistoryIterator = ActivityMonitor.getHeartRateHistory(1, true);
var heartRateSample=heartRateHistoryIterator.next();
dc.drawText(110, 145, Gfx.FONT_MEDIUM, Lang.format("hr $1$", [heartRateSample.heartRate]), Gfx.TEXT_JUSTIFY_CENTER);

I'm not sure I have fully understood the concept of the iterator I get from calling the method getHeartRateHistory

And sometimes the values is not the same values as the values I get when using the original Garmin HeartRate widget on the watch

Have I done anything wrong here?

Here's the code I use. It's a bit different as I check for both null values as well as bad readings:

var hrh=ActMon.getHeartRateHistory(1,true);
var hr="--";
if(hrh!=null) {
var hrs=hrh.next();
if(hrs!=null && hrs.heartRate!=null && hrs.heartRate!=ActMon.INVALID_HR_SAMPLE) {
hr=hrs.heartRate.toString();
}
}
ret="hr: "+hr;


You'll see INVALID_HR_SAMPLE in a case where you're not wearing the watch for example, and "null" might happen if you have the WHR turned off on the watch.

As far as not matching the widget, this is the "history" and not a live reading. The watch takes a reading every couple minutes, which you can "iterate" through. (In this case you're asking for one sample, and the newest one first, so nothing to really iterate through.. if you had requested more than one, by doing a ".next" you could go though all of the samples from newest to oldest for example.)

The sample you're getting could still be a couple minutes old, while the widget is showing a current reading - that's why they might not always match.

Thanks a lot Jim, magnificent help