getting magnetic field values

[Jacks]

Hi guys

I'm a begginer in web apps and I'm trying to get the magnetic field values x, y and z, like I do in Android, but I don't know how to do that.
On this page https://developer.mozilla.org/en-US/docs/DOM/Mozilla_event_reference
there is no reference to magnetometer in SensorEvents. I can get the values from accelerometer, gyroscope and every other sensor except magnetometer.

thank you guys

[Harald Kirschner]

Hi Jacks,

you need the deviceorientation event, using the event property alpha.

The event API: https://developer.mozilla.org/en-US/docs/DOM/Mozilla_event_reference/deviceorientation

A demo: https://developer.mozilla.org/en-US/demos/detail/simple-compass/launch

And some more in-depth description of the values: https://developer.mozilla.org/en-US/docs/DOM/Orientation_and_motion_data_explained

Good luck!

---
Harald Kirschner | Partner Engineer & Web Craftsman | har...@mozilla.com (mailto:hkirs...@mozilla.com)

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[joao.mcm...@gmail.com]

Hi Harald, thank you for your time.

I don't want magnetic north, I want the values from the 3 axis (x,y and z), to be able to calculate magnetic field strength. I know that with the alpha from orientation sensor we can get magnetic north but this is not what I want.
In android, with TYPE_MAGNETIC_FIELD it is possible to get x value with event.values[0], y with event.values[1] and z with event.values[2]. This is what I want and I don't know how.

thanks