Temp, Humidity CO2 sensor and library.

Using Arduino Sensors
69

I tried this as well.. still showing "ÿ"

robtillaart:

#include <SoftwareSerial.h>

SoftwareSerial nss(3,2);

void setup()
{
  Serial.begin(9600);
  nss.begin(9600);
  delay(3000);
  nss.println("z")
}

void loop()
{
  if (nss.available() > 0)
  {
    Serial.write(nss.read());
  }
}




slightly different, added a "z" to tickle the sensor, and an explicit >0 test 
can you try?