DOUBLE TAP NOT WORKING IN LSM6DSO

[srao.1]

Dear Concern,

we are using LSM6DSO MODULE for my project purpose

Double Tap Issue :

 Double tap is not working if we configured less than 208 Hz (Accelerometer ODR).

Activity/Inactivity Interrupt Issue:

At least one fake activity/inactivity interrupt is generating when power on the device if we configured with accelerometer lower data rate (less than 208Hz)

could you please let me know the solution for this issues.

Thanks & Regards,

Srinivas Rao.

[Eleon BORLINI]

Hi Srinivas @srao.1​ ,

Double Tap Issue:

Please consider this statement from the application note AN5192, p.47:

Single and double-tap recognition work independently of the selected output data rate. Recommended minimum accelerometer ODR for these functions is 417 Hz.

This because it is needed a certain time / frequency resolution to properly detect (especially) the double tap, since this application is calibrate

Activity/Inactivity Interrupt Issue:

For this operation, the detection should work also with ODR=12.5 Hz... Did you try to increase the threshold value in the  WK_THS[5:0] bits of the WAKE_UP_THS register? Or are you sure to distinguish inactivity from activity interrupt? (You might receive an Inactivity interrupt after sometime and you could consider it as a fake interrupt). (Image from same app note, p.54)

 

-Eleon