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LPS25H differential mode

Question asked by mutti.andrea on Aug 3, 2015
Latest reply on Dec 22, 2015 by Muhuho.Adalberto
Good morning,
I'm trying to set up a LPS25H sensor to read the same value as another one, which is the reference, in a controlled environment. 
My first guess has been to set up REF_P registers as the difference between readings from the 2 sensors which is initially stored by firmware.
I set up REF_P registers, I enable the DIFF_EN bit in CTRL_REG1 (while sensor is disabled) and finally I enable the sensor again.
The problem is that measures coming from sensors still differ for the same amount of pressure,  while if I subtract the previously evaluated difference by firmware readings are very near.
Could someone please describe the correct procedure to setup differential mode?

Thank you,