Trying to make lis2dh sense any rotation

[abdu21]

Hi, I was trying to make the sensor sense slow rotation.

I read the datasheet and I guess if I set HPM to work as normal mode, and High-pass filter for interrupt 1

so CTRL_REG2 should have 0x81,

Then I should read the REFERENCE (0x26) register, (according to the thread in here https://community.st.com/t5/mems-sensors/lis2dh12-measure-conversion/td-p/420708)

 

My question is, is it even doable ? 

Can I sense slow rotations until it reaches some point ?

Thanks in advance

 

[Federica Bossi]

Hi @abdu21 ,

The LIS2DH12 is a 3-axis accelerometer and does not measure rotation rates directly, it cannot sense rotation velocity like a gyroscope does.

Setting HPM (High-Pass Mode) to normal mode and enabling the high-pass filter on interrupt 1 (e.g., CTRL_REG2 = 0x81) configures the accelerometer to filter out low-frequency components (like gravity) and detect dynamic acceleration changes.

Reading the REFERENCE register (0x26) is used to set the baseline for the high-pass filter, so that slow changes (like tilt or slow movement) can be differentiated from sudden movements.

Using the high-pass filter and REFERENCE register helps detect dynamic events but may not capture very slow rotational movements.

If you don't want to use a gyroscope, you can use LIS2DH12 for tilt angle estimation but be aware of limitations for slow rotation detection.