Using Serial Monitor to get readings off of sensors

Using Arduino Programming Questions
1

Hello again...

I have worked through the tutorials for both the Grove- HCHO Sensor and MQ3 Gas Sensor v1.5 and am displaying values for them. I have opened the Serial Monitor and have had no problems with the code. Are the values displayed in the serial monitor cumulative between both sensors? By values I really mean ratios. I have attached a screenshot of what I am getting:

Screenshot (7)
Screenshot (7)1366×768 47.3 KB

2

They are what ever your program displays and how would we know that?
Paul

3

Post the code, using code tags.

Most example programs for those sensors report the instantaneous value output by the sensor.

Did you "burn in" the sensors for 48-72 hours as required?

4

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