Day: November 3, 2019

MQ9 Learning Notes

8:20pm Fri. 11/1/2019 (1) MQ9 Learning Notes: https://penzu.com/p/93aaa16e (2) MQ9 Calibration and Test Notes: https://penzu.com/p/f2d2f438 MQ9 Learning Notes V0.9 Question  How can Rpi read MQ9 Gas Sensor Data? Answer 1.  MQ9 module has two types of output: […]