Measuring CO2 Levels aka "The Sleepyness Multiplier"

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Thirsty Tweeting Office Plants

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Connecting Anduino to IFTTT

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Smart 3D printer Filament Counter (FilamentBot)

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  • Measuring CO2 Levels aka "The Sleepyness Multiplier" about 1 month ago

    You got it, thanks for the feedback!

  • Measuring CO2 Levels aka "The Sleepyness Multiplier" about 1 month ago

    Hey Michael and Craig! You make some great points! I'm in no way affiliated with the cozir sensor folks and agree it's a shame they're so expensive. What they do offer that those other sensors (linked above) do not is an incredibly easy to use interface and some great power requirements.

    Calibrating takes hardly any effort (just a serial command - instead of manually turning a potentiometer) and no additional circuitry and load is required to process the analog signal, it all happens in the sensor package. This free's your micro up to take care of processing other things! The new ones also ship with Temp and Humidity included as well. The NDIR method also allows you to take insanely frequent readings so it increases your resolution and it runs at 3.3v pulling minimal current. This sensor requires 6v and pulls 200ma!(vs35ma) and literally has to warm up in order to kick off a chemical reaction that determines the reading.

    This sensor coupled with a $5 ESP8266 would be your cheapest way to get CO2 data into the cloud for sure. There's a reason I specifically chose to use the Arduino Due coupled with the WiFi shield but that will have to wait until a future project post :-x Can't wait to share why!

  • Thirsty Tweeting Office Plants 2 months ago

    Hey Chris!

    I'm tracking the moisture of the soil. I map the reading into what I'm calling a "relative humidity". Typically relative humidity refers to moisture in the air but in this case I'm displaying a percentage that correlates to total saturation of the soil. My 100% value correlates to fully saturated, 0% completely dry.

    I've calibrated these to the capacitance readings transmitted by the soil sensor. I talk about the calibration steps here

    Great point about the enclosure! Time to get to the 3d printer and get this Anduino case printed!

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