I have bought this MH-Z16 CO2 sensor and now I have problems to receive data from the sensor, I have connected this sensor with Arduino MEGA (I used Grove - Mega Shield v1.2).
I have run the code from https://wiki.seeedstudio.com/Grove-CO2_Sensor/ and get the output but all the 9 values get the same output at a time and they don’t change. After refreshing the serial monitor output I get the another result but all are same.
I have attached the output page below.
Please help me out from this problem as soon as possible.