Issue with getHeartRateZones

I'm writing a Watchface using getHeartRateZones, and I have an issue running it on The Garmin MK1 Watch (last firmware).

Using SDK 4.0.6.

UserProfile.getHeartRateZones(UserProfile.HR_ZONE_SPORT_GENERIC)

(called from onUpdate or onLayout, my class inherit WatchUi.WatchFace)

- returns null when the watchface is running on the Garmin MK1

- it works nicely in the simulator

- works nicely on a vivoactive 3

- it works nicely in the watchface preview on the watch (when you use settings to choose the witchface)

Any idea ?

Jean

jeansch over 5 years ago

Workarounded, after reading https://forums.garmin.com/developer/connect-iq/f/discussion/6191/getheartratezones-on-fenix-5x-not-returning-an-array

Cached zones while in preview...

Not quite elegant.

jim_m_58 over 5 years ago in reply to jeansch

I forget if the MK1 has HW similar to the f5x, but the f5x uses a dual core architecture, where the watch face runs on a 2nd processor and can't access info on the main one. Another example is Activity.Info.getCurrentLocation. You'll see the info when selecting a watch face (that's done on the main core) but not when the watch face is running on the second core.

jeansch over 5 years ago in reply to jim_m_58

Thank you Jim for your answer.

Do you know if there is some recommendation somewhere to handle the dual core subtility ?

Thinking about that, that's not the first time I have that kind of issue (variable update in a callback not up to date in "view").

jim_m_58 over 5 years ago in reply to jeansch

I'm thinking there is in this very forum for 5-6 years back when the f5x came out. The f5x was pretty unique so probably hasn't come up much the a few years.