Accelerometer to roll and pitch

[khatarat]

hi
how can i convert accelerometer vector to quaternion and then convert it to pitch and roll?
i want full 360 degrees of roll and pitch

 

[HallsofIvy]

Then you will need more than one accelerometer. You will need three accelerometers aligned with three axes at right angles.

 

[khatarat]

i have a tri-axis accelerometer.