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    Units CO2/TVOC

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    • P
      pierre.halleux
      last edited by

      Hi,
      I'm trying the Units CO2/TVOC M5Stack Sick C.

      I'm just copy/pasting the code from the demo https://docs.m5stack.com/#/en/unit/tvoc
      And
      eCO2 stays blocked = 400ppm
      TVOC stay bloced at 0
      H2 moving a bit around 13580

      Any idea ?
      Does not seems to work fine.... I have another device Neatmo measuring CO2. It says it's not 400 but almost 1300ppm

      COuld you help?
      thanks,

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      • mauwiiM
        mauwii
        last edited by

        You need to find the right calibration (baseline) values for your unit, so only initialize it, but do not define a baseline, then you will see a difference. Also it should be clean air in the room, f.e. not smoking with closed windows for days.

        for debugging purpose output the current baseline values as well, I think you will see a big difference to the ones in the sample then.

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        • S
          Serge
          last edited by Serge

          hi,
          don't know why but if you set that line n°31 in comment, it seems to work

          "# tvoc0.set_iaq_baseline(35187, 35502)
          while True:

          you may try to use the sample loop that you find in UIflow_Unit TVOC.

          As you can see on the picture below, TOVC/eCO2 can be use in a classroom context and it works fine
          I initialized it outside the window and came inside after

          0_1623533101105_Mesures5.png

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