From the datasheet it looks to me that the AVOUT pin provides 0 to 4V depending on the level of CO2. So you could connect that pin directly to an analog input. The only other pins I think you need to connect are +5V and ground.
From the datasheet it looks to me that the AVOUT pin provides 0 to 4V depending on the level of CO2. So you could connect that pin directly to an analog input. The only other pins I think you need to connect are +5V and ground.