Hello, I am a new user of the MPU9250, I would like to do a directional gyroscope, but reading Kriswinner first of all indicates a calibration. For the case of the magnetometer, it is mandatory to know the magnetic declination to proceed with the reference calibration: https://github.com/kriswiner/MPU6050/wiki/Simple-and-Effective-Magnetometer-Calibration
The issue is, how do I want to make a directional gyroscope, which is going to be in motion all day in a car, should I calibrate several times a day ?, or is only one calibration needed until the next day?
Thanks in advance
Pablo