LIS2DW12's sensitivity setting

[Paul.Lee]

Hi,
I am using LIS2DW12 to detect walking situation of old man.
Old man is walking slowly and little moving, 
In order to detect this small moving, what and how do I set CTRL register you recommend?

I have to check continuous moving state....

If LIS2DW12 is not suitable this acton, what do you recommend new chip? 

BR
Paul 

[Federica Bossi]

Hi @Paul.Lee ,

If you want to use only the acceleration to detect walking, LIS2DW12 is fine.

I suggest you to set an high FS (16g for example) and low ODR, you could try 50Hz.

Hope this helps.

[Paul.Lee]

Hi,

+/-16g is more sensitive than +/-2g?

BR
Paul

[JasonRrrr]

I don't work for ST but I have used this accelerometer.

2g is much more sensitive. I suggest High performance mode, low pass filter with BW filter at maximum. LOW_NOISE enabled.

Fastest way I've found to test settings is using micropython using Thonny with a Rasperry pi pico. it's super simple and it has a built in live chart to see how your changes affect the readings.

[Paul.Lee]

Hi,
Thank you for help.

I have to be aware of battery power consumption, so I set to Low power mode.

I set 25Hz with low power mode 1. CTRL1 is set to 0x30

My device is using CR2032.

BR
Paul

[Paul.Lee]

Hi, Federica, 
Please add a comment on this.

BR
Paul

[Federica Bossi]

Hi @Paul.Lee ,

I don't think you could have problems using low power instead of high performance. But I suggest you to increase the ODR to 50 Hz.

You can do a test with your settings and if you cannot discriminate steps change them.

[Paul.Lee · Accepted solution]

Hi, Federica,

TAP_THS_X/Y/Z threshold value were set little high value.
I have changed that value to 1, and become more sensitive and satisfied.
BR
Paul