Always wrong output from CO2 sensor TGS4161

sinnadyr · **Joined:** Wed Feb 22, 2012 1:34 pm **Posts:** 22

Quote:

int co2 = 0;
  SensorGas.setBoardMode(SENS_ON);
  SensorGas.configureSensor(SENS_CO2, 10);// Gain of 10
  SensorGas.setSensorMode(SENS_ON, SENS_CO2);
  [color=#CC6600]delay(45000); // Wait for CO2 sensor warmup
  co2 = analogRead(ANALOG3) // Reading ADC value, not volts

When running

Quote:

XBee.print("Carbon dioxide level: ");
XBee.println(co2);

I always get "Carbon dioxide level: 4" on my terminal, even if I change the gain to 1.

What could be the problem? I read out the other sensors like this as well, and they are working perfectly.
Thank you very much in advance

libelium-dev · **Joined:** Mon Sep 28, 2009 1:06 pm **Posts:** 7516

Hi sinnadyr,

the part of the code you use to read the sensor seems right. Could you please post your whole code so we can try it here in Libelium?

Regards.