"oh, you are right!! sorry.. =)   Any idea why the value is jumping gradually for yaw angle from 20° to 1++° although i didn't touch the board??   thanx again Gilles =)"

"hi Gilles,   thank you for the code. I tested it and it works fine. But, the yaw values are so weird. They keep changing from positive to negative values and vice versa although i did't touch the board. Do you know why? Hpw should i edit…"

"Hi Gilles,   I already did the programm, but my yaw value is catastrophe.. =( the other value (pitch, roll, gyro & accelerometer) is ok. i'm totally a beginner. Can u check my program, and tell me, what should i edit to get a correct…"

"i already run the program, and may i know, is the output value of gyro angle, is already calculated using the kalman filter equation?"

"Hi Gilles, thank you very much!!"

"Hi Gilles, Hi everyones i already got the following hardware from sparkfun 1) 9 DOF SEN-09623 2) 3.3V FTDI Basic Breakout   i already installed Arduino Software and my problem here, i would like to know the command to display the value of…"