Hi,
I am currently working on a project where I use the MPU 9150 sensor.
I get accelerometer, gyro and magnetometer data as an output by calling the function void getMotion9(int16_t* ax, int16_t* ay, int16_t* az, int16_t* gx, int16_t* gy, int16_t* gz, int16_t* mx, int16_t* my, int16_t* mz) from this library
The output data for accelerometer and gyro seem to be comprehensible.
But the output data for the magnetometer don't make sense to me.
The following data are samples I took by moving the sensor.
The first column shows the degree from the starting position.
| degree | mx | my | mz |
|---|---|---|---|
| 0 | 1714 | 2414 | -754 |
| 90 | 2174 | 2794 | -614 |
| 180 | 2564 | 2344 | -824 |
| 270 | 2124 | 2044 | -964 |
I then want to calculate the actual heading with the following formula:
heading = arctan2(mx,my)*180/pi
But this results in confusing headings that don't make sense.
Any idea what I am doing wrong or I can try to find the error?
If you need more information please don't hesitate to ask.
Thank you for your help!