Magnetometer()

The Magnetometer() constructor creates a new Magnetometer object which returns information about the magnetic field as detected by a device's primary magnetometer sensor.

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options Optional

Options are as follows:

• frequency: The desired number of times per second a sample should be taken, meaning the number of times per second that sensor.onreading will be called. A whole number or decimal may be used, the latter for frequencies less than a second. The actual reading frequency depends on device hardware and consequently may be less than requested.
• referenceFrame: Either 'device' or 'screen'. The default is 'device'.