How to convert magnetometer readings into orientation?

1. How do you find the angle of a yaw from a magnetometer?
2. What is XYZ on a magnetometer?
3. How does a magnetometer show the direction and changes in the magnetic field?

How do you find the angle of a yaw from a magnetometer?

As in accelerometer one can use the X, Y and Z magnetometer readings to calculate yaw. mag_x = magReadX*cos(pitch) + magReadY mag_y = magReadY * cos(roll) - magReadZ yaw = 180 * atan2(-mag_y,mag_x)/M_PI; Now the most common question asked is, why can't we calculate yaw using accelerometer itself?

What is XYZ on a magnetometer?

The magnetometer sensor measures the magnetic field for all three physical axes (x, y, z) in μT (micro Tesla). This specification defines two new interfaces: Magnetometer that reports calibrated magnetic field values, and. UncalibratedMagnetometer that reports uncalibrated magnetic field values.

How does a magnetometer show the direction and changes in the magnetic field?

Based on the principle of Faraday's laws of induction, these magnetometers comprise copper coils wrapped around a magnetic core. The core gets magnetized by the magnetic field lines produced inside the coils and the fluctuations in the magnetic field bring about the flow of electrical currents.