I have Runlinc Stemsel E32W microprocessor which has bulit in Wi-Fi module. I have connected the +ve of the Co2 to the 5V io25 (Runlinc), the -ve of Co2 to GND in io33 (3V) and the A of Co2 to the 3V.
I have uploaded the image which shows connection (Blue wire is the +ve, Red Wire is the -ve and Brown wire is the A in CO2 sensor).
And another image is attachedd showing the Runlinc online IDE which shows the current readings.
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When the analog output is less than 142 then the LED in Co2 turns on and vice versa.
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When I breathe near the sensor, the value drops but doesn’t go below 100.
Now, what I want to know is according to the datasheet of MG-811 provided by the core-electronics, the output value should be in range of 30-50mV ( 350—10000ppmCO2). Why is the voltage output readings too high?
This is the datasheet from core-electronics.
I have attached a datasheet specification of MG-811 from a different website url:https://sandboxelectronics.com/?p=147 : Here, the output voltage is 100-600mV 400-10000ppm CO2.