Filtering out gravity, datasheet problems (LIS331HH)

[britton]

Posted on April 14, 2014 at 01:46

First I like this part and I LOVE the interface code that comes with it

(stsw-mems004.zip from this page:

http://www.st.com/web/catalog/tools/FM147/CL1818/SC1885

[dmg0048]

Posted on April 26, 2014 at 00:56

Regarding your last question you should verify the resolution of the accelerometer to obtain the actual sensitivity, usually the output data is divided between two registers (16 bits) but that doesn't necessarily mean all those bits contain data, and that the output registers are in two's complement to convert it to g units.

It's usually on the datasheet, but you can manually check the resolution by measuring samples on the full range and checking which bits change (data) and which stay always to zero.