Converting values of analog inputs to voltage



  • Hi all,

    a few days ago I connected an airquality sensor with 0-10V output to the analog input of the Unipi board (V1.1).
    In FHEM I'm getting values like "408421.875".

    I have no idea how to convert these values to a standard voltage value like 4,5 V.
    Can anybody help me?

    Regards,

    Peter



  • Hi all,

    a few days ago I connected an airquality sensor with 0-10V output to the analog input of the Unipi board (V1.1).
    In FHEM I'm getting values like "408421.875".

    I have no idea how to convert these values to a standard voltage value like 4,5 V.
    Can anybody help me?

    Regards,

    Peter



  • hey,
    the standart measurement of Voltage on arduino are at max 5V measurement range, between 0 - 1024.
    That's like the Values u can see, but only higher..
    i dont know the max Value of measurement from unipi, but if you put 10V at input u can see (maybe anywhere over 408421.875 i think, i name 5000000 as max at 10V here).
    Set this in relation 0v-10V to Value 0 - 5000000 so you can count your Voltage.