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Topic: MQ-7-M CO sensor module (Read 59 times) previous topic - next topic


Hello guys!

I am a bit confused about this, MQ-7-M sensor module. I don't really know how to use it properly. I bought it in a module and it has 4 pins: AOUT, DOUT, VCC, GND. Datasheets says the power should be 5V for the heating than 1,4V for reading the sensor value. Is it necessary to program this or the IC does this in the module? As a matter of fact how should I read the sensor value and why is that there are two out pins? And my other problem, is it necessary to use a library as for the DHT sensors?

Thank you! :)



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