Hello, I wanted to use the mq-7 gas sensor,but when I read the readings from Analog OUTPUT pin they weren't accurate so I researched and realized I have to calibrate the sensor. Could anyone explain me how to calibrate the mq-7?

MQ-7

harryprogram April 23, 2019, 7:54pm 7

What is a normal ppm value I should get in my house and when I place it near fire?

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