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  3. Pulse Sensor for electricity sketch question

Pulse Sensor for electricity sketch question

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  • Bert BroekB Offline
    Bert BroekB Offline
    Bert Broek
    wrote on last edited by
    #1

    Hi,
    i have a question about the example sketch Power meter Pulse sensor.
    I hav it all working now but the KWH total count is off.
    I have figured out that my meter has a pulse count of 187,5 blinks/kwh.
    so i changed the value of #define PULSE_FACTOR 1000 to 187.5.

    but it seems the arduino is rounding this number to 187, so my total kwh will be off.
    i think it is because of a float/int messup.
    how can i correct this?

    i was thinking of counting every pulse twice and then set the pulsefactor at 375.
    Maybe there is a other easy way around??

    Kind regards,
    Bert.

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    • mfalkviddM Offline
      mfalkviddM Offline
      mfalkvidd
      Mod
      wrote on last edited by mfalkvidd
      #2

      The example sketch uses double for kwh so it shouldn't have problems with 187.5. Are you sure that's the problem?

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      • Bert BroekB Offline
        Bert BroekB Offline
        Bert Broek
        wrote on last edited by
        #3

        I think the result is a floating point number but the divider isn't. I'm going to rewrite the formula so it matches my old sketch which was working correctly.

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