topic MMA8652FC Rotation, referencial change in Sensors https://community.nxp.com/t5/Sensors/MMA8652FC-Rotation-referencial-change/m-p/813585#M5212 <HTML><HEAD></HEAD><BODY><P>Hello everyone,</P><P></P><P>Don't know if this is the correct location to ask this, to debate this topic.</P><P></P><P>I have the accelerometer (MMA8652FC) inside my equipment, such that when the equipment is placed in rest in a flat surface I have the G vector forces (0, 0, 1), like I show in the image (Forças_G_EN.png).<BR />This would be the ideal position to place it inside a car, were would we know the position of the equipment / car.<BR />I mean, we would know that the front of the car was at -X, back was at X, left was at -Y, right was at Y, floor was at -Z and roof was at Z. Image (EquipInCar_02_EN.png)</P><P></P><P>But the equipment is placed inside the car in a frontal position to the co-driver, and it can be in a rotated position.<BR />It doesn't have a fixed position.</P><P></P><P>I show in image (EquipInCar_01_EN.png) an example of the positioning in a car.</P><P></P><P>My question is how to convert the values given by the accelerometer from the position in the car (EquipInCar_01_EN.png) to the ideal position (EquipInCar_02_EN.png)?<BR />Anyone can help on this?</P><P></P><P>Regards,</P><P>Sergio</P></BODY></HTML> Tue, 03 Feb 2026 23:44:15 GMT sérgioneves 2026-02-03T23:44:15Z MMA8652FC Rotation, referencial change https://community.nxp.com/t5/Sensors/MMA8652FC-Rotation-referencial-change/m-p/813585#M5212 <HTML><HEAD></HEAD><BODY><P>Hello everyone,</P><P></P><P>Don't know if this is the correct location to ask this, to debate this topic.</P><P></P><P>I have the accelerometer (MMA8652FC) inside my equipment, such that when the equipment is placed in rest in a flat surface I have the G vector forces (0, 0, 1), like I show in the image (Forças_G_EN.png).<BR />This would be the ideal position to place it inside a car, were would we know the position of the equipment / car.<BR />I mean, we would know that the front of the car was at -X, back was at X, left was at -Y, right was at Y, floor was at -Z and roof was at Z. Image (EquipInCar_02_EN.png)</P><P></P><P>But the equipment is placed inside the car in a frontal position to the co-driver, and it can be in a rotated position.<BR />It doesn't have a fixed position.</P><P></P><P>I show in image (EquipInCar_01_EN.png) an example of the positioning in a car.</P><P></P><P>My question is how to convert the values given by the accelerometer from the position in the car (EquipInCar_01_EN.png) to the ideal position (EquipInCar_02_EN.png)?<BR />Anyone can help on this?</P><P></P><P>Regards,</P><P>Sergio</P></BODY></HTML> Tue, 03 Feb 2026 23:44:15 GMT https://community.nxp.com/t5/Sensors/MMA8652FC-Rotation-referencial-change/m-p/813585#M5212 sérgioneves 2026-02-03T23:44:15Z