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It seems like I have a problem with understanding the values I am getting from the accelerometer and gyroscope. First of all, it is stated that the IMU is using a left-handed coordinate system where Z is directing upwards. (as mentioned here :www.st.com/web/en/resource/technical/document/datasheet/DM00103319.pdf?_ga=2.91175770.1596273909.1572880735-388278844.1572880735) page number 10 However, I get +1 in the Z direction when the board is standing still ? I thought I should get -1 as the accleration is in the negative direction ? I thought that the sensor may be flipped upside down ( so one axis will be flipped while the other stays the same) but both of them are still flipped which does not make sense ? The gyroscope are following the (right hand rule ) even for a left coordinate system ? any help would be appreciated. Thanks !