STMP3x measurement calculations

[Mehul Laliwala]

Posted on November 06, 2017 at 21:07

Currently, I am evaluating STPM3x, but having hard time understanding how to convert register value to floating point signed integer values.

I can calculate voltage and current rms values, but I am trying to convert apparent power  (reg. 90) , active power (reg. 84), and reactive power(reg.88).

Any examples would be helpful.  Datasheet is not clear.

Thanks in advance! 

[Nicolas Cuadrado]

Posted on May 06, 2018 at 22:33

Hello Mehul!

I'm facing the same issue, documentation is not that clear for me, for some values i get values near to the expected when calculating by hand, but for several others i can't.

Did you find out how to understand the values?

It would be very helpful.

Regards!