Accelerometer MPU-6050

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hello,

i know when accelerometer lying flat on table should have reading of 1g in z direction. mpu reads 0.85. have used mpu-6050's before , before have read close 1g in z direction. uncommon? need zeroed/calibrated/averaged? mpu-6050 made sunfounder.

thanks in advance help.

it needs calibrated.
what reading when flip on 180 degrees?

calibration overview here.


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