Magnetic Field

The magnetic field sensor is a position sensor that measures changes in the earth's magnetic field around the device.

This sensor does not currently require any specific permission. The JSON format for a sample from this sensor is:

{
	"userid":"user-id",
	"deviceid":"device-id",
	"senseStartTime":"14:10:11:895 30 06 2015 +0100 GMT+01:00",
	"senseStartTimeMillis":1435669811895,
	"dataType":"MagneticField",
	"xAxis":[38.29600143432617,37.36199951171875,...],
	"yAxis":[48.145999908447266,48.145999908447266,...],
	"zAxis":[34.027000427246094,34.393001556396484,...],
	"sensorTimeStamps":[1435669811923,1435669812118,...],
	"sampleLengthMillis":8000
}