LIS3DH interrupt is not generating on some kind of motion

[BPate.5]

Hi,

The use case of my application is to detect only motion in any direction with LIS3DH. The following are configurations for LIS3DH. The problem is that I am getting interrupt only with some kind of linear motion or vibration. When I install my device on the door and I open the door (angular motion), I am not getting interrupt. What could be the reason? Let me know if more information is required.

CTRL_REG1 = 0x2F;

CTRL_REG2 = 0x09;

CTRL_REG3 = 0x40;

CTRL_REG4 = 0x00;

CTRL_REG5 = 0x00;

CTRL_REG6 = 0x00;

INT1_THS = 0x03;

INT1_DURATION = 0x0A;

INT1_CFG = 0x15;

Regards,

Bipin Patel

[Eleon BORLINI]

Hi @BPate.5​ Bipin Patel,

I see you configured the two parameters for the in the following way:

INT1_THS = 0x03;

INT1_DURATION = 0x0A;

You might try to modify these parameters in order to optimize the specific movement detection. You can also try to increase the ODR from the current 10Hz to 100Hz):

CTRL_REG1 = 0x5F;

As a general suggestion, if you want to detect a rotational movement, maybe a gyroscope or a 6axis would be a more reliable solution.

-Eleon

[BPate.5]

Hi Eleon,

Thanks for your reply.

The current HW has accelerometer LIS3DH and I can't change HW as devices are already in field. So I have to detect motion with accelerometer only.

I have tried to increase ODR but sometime it works and sometime not. I have to set threshold to 0x02 to make it work sometime.

What other changes could help me to get interrupt on every motion in any direction?

Regards,

Bipin Patel