Monkey C - How to use Toybox.Sensor.HeartRateData

Hi! :)
I want to use the HeartRateData from my watch to get beat-to-beat interval, but I don't know what I should do with the data I get, and I can't find any documentation about it.

I got following data (for example):

HeartRateData: [500, 500, 517, 517]
HeartRateData: [500, 500, 517, 512]
HeartRateData: [500, 500, 514, 513]
HeartRateData: [500, 500, 512, 517]

What is the formular (or whatever) to get the beat-to-beat interval with these values?

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0 flocsy🤠 7 months ago

these are the values in millisecond: 500ms means that that beat was 120BPM

0 7410601 6 months ago

Ah okay - thanks!

The first 2 elements are always 500, 500. In the simulation, and also in a fit file from me. And I get this data every second.
I am receiving this array every ~1s. But with 4 values with ~500ms this would add up to 2s.

So i don't really understand this data. Can/do I have to ignore the 500, 500?

0 7410601 6 months ago in reply to 7410601

flocsy🤠 could you please help here again?

0 flocsy🤠 6 months ago in reply to 7410601

Sorry, I don't really know how. What I would do is to try to go for a run (and try to get some low, medium and high values) and records my HR this way AND another way, and try to "reverse engineer" it afterwards.

0 7410601 6 months ago in reply to flocsy🤠

Ahh okay. Then I will try it out like this.
I thought that I was overseeing something in the documentation, but apparently there is no "proper" documentation for this.

I will update this post, when I find something. :)

Thanks anyways

+1 7410601 4 months ago

FYI: The data of the simulator was wrong for me.
The real data looks something like this (uploaded the App to my Garmin and tested it):

HeartRateData: [529, 525]
HeartRateData: [521, 530]
HeartRateData: [575, 653]
HeartRateData: [617]

I still don't know, why the values or not correct from the simulator.
But at least I can continue from here.