Temp, Humidity CO2 sensor and library.

Using Arduino Sensors
34

I don't get it to work, I hope someone can point out what's going wrong.

The sample sketch provided by Cozir, as posted earlier here, gives me weird values:

Co2 = ovf ppm
Co2 = ovf ppm
Co2 = ovf ppm
Co2 = ovf ppm
Co2 = -1152925184.00 ppm
Co2 = -1152925184.00 ppm
Co2 = ovf ppm
Co2 = ovf ppm
Co2 = ovf ppm
Co2 = ovf ppm
Co2 = ovf ppm
Co2 = ovf ppm
Co2 = ovf ppm
Co2 = ovf ppm
Co2 = ovf ppm
Co2 = ovf ppm
Co2 = -4208868864.00 ppm
Co2 = -4208868864.00 ppm
Co2 = ovf ppm

At first I didn't even get these values, but in the code Rx and Tx seem to be exchanged. Just switch the wires if you get no results at all.

I also tried the sketch in the first post of this topic the library 1.03 by Rob Tillaart & Michael Hawthorne, nothing happens. When I use the same sketch with the old library that's attached with the first post, I get this on my monitor:

Celcius : 0.00
Fahrenheit : 32.00
Humidity : 0.00
CO2 : 0
Digital Filter : 0

Sometimes after a reset, the values are a bit different, I think due to calibration or lack thereof:

Celcius : 0.20
Fahrenheit : 32.36
Humidity : 0.20
CO2 : 2
Digital Filter : 2

I uncommented the line below, because I read the sketch is supposed to work with polling and the default mode is streaming. The line implicates it's used to enable polling:

czr.SetOperatingMode(CZR_POLLING);

However, with the other line activated, to set streaming, I get similar readings:

Celcius : 0.10
Fahrenheit : 32.18
Humidity : 0.10
CO2 : 1
Digital Filter : 1