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Topic: SainSmart MG-811 CO2 sensor module (Read 36 times) previous topic - next topic

I purchased a MG-811 CO2 sensor module made by SainSmart from Ebay a week ago: http://www.ebay.com/itm/SainSmart-MG-811-MG811-CO2-Carbon-Dioxide-Sensor-For-Arduino-UNO-R3-Raspberry-Pi-/301191399526?pt=LH_DefaultDomain_0&hash=item4620680866.

They don't offer any kind of documentation other than some operating parameters and specs. Has anyone successfully hooked one of these up to the Arduino to read CO2 levels by ppm? From what I understand, this module is similar to the one by Sandbox Electronics: http://sandboxelectronics.com/?p=147.

From the description, the board amplifies the output signal of the sensor. There is a GND and Vcc, which gives power to the internal heater. But I am confused about the AO and DO pins. I'm guessing that they are digital and analog output? This is different from the Sandbox one. How would you connect this to the Arduino, and would the calibration calculations be the same for both sensors? (Sandbox and documentation).

Thanks for any help.

 

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