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I try to check my iwatch2 barometer sensor(built in). My environments are like this. Xcode beta 8.1 + iphone6S(ios10.1) + iwatch2(watchos3.1)

This is my steps. Projects > myBaro watchkit extension > info.list add CoreMotion(for watchos 3.1)

in my source. add coremotion @import coreMotion. And check altimeter(barometer) is enable or not. [CMAltimeter isRelativeAltitudeAvailable] This returns 0 - false.

I try same code with iphone6S. [CMAltimeter isRelativeAltitudeAvailable] returns 1 - true.

iphone6S and iwatch2 both have barometer.

I don't know why watchos returns false at iwatch2 case.

Is there anybody success to enable barometer?

Apple developer code-level-support answer my question. just link https://developer.apple.com/library/prerelease/content/samplecode/SwingWatch/Introduction/Intro.html#//apple_ref/doc/uid/TP40017286 But it is using phone motion information.

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Currently apple not support barometer functions on watch2. They will update and anounce when altimeter functions are working.