Calibrate Gyro, Accel and Mag in MPU9250
To check Mag calibrating
01 - Using Putty to record data.csv 02 - Download Gnuplot (http://gnuplot.info/) 03 - Open Gnuplot terminal in csv file dir and type set datafile separator "," plot "data.csv" using 1:2 title "XY" pointsize 2 pointtype 7, "data.csv" using 1:3 title "XZ" pointsize 2 pointtype 7, "data.csv" using 2:3 title "YZ" pointsize 2 pointtype 7