In this first test I have kept the sensor running for about 10 hours powered by a programmable laboratory power supply which modified the supply voltage every 60 seconds between 4.5V and 5.15V in 0.5V steps. That is: I powered the sensor at 4.5V for 60 seconds, switched to 4.55V for another sixty seconds, 4.6V for another sixty seconds and so on (at 5.15V I switched to 4.95V for 5 minutes, to stabilise it, and started the cycle again at 4.5V). |Along with the Buzzer you can also use a relay to control the Exhaust Fan, or to open the window. It depends on you, what exactly you want to control when the CO2 ppm value increases inside the room. Anyway, I have already uploaded this program and now let’s watch the Gravity Infrared CO2 Sensor V2.0 in action. One more thing that I would like to talk about is, I am not using the Arduino 5V but I am using the 5V from my regulated power supply its 3A which is more than enough for its smooth operation.

As soon as I took this sensor outside, the ppm value started to decrease, which means this sensor is working. You can see the final outdoor CO2 ppm value is around 430ppm. I have been testing this sensor for hours, and it’s working flawlessly. The values are pretty stable, and I’m sure it’s because of my 5V and 3A power supply. I have included a list of the most frequently asked questions about projects built using Arduino and the CO2 sensor. However, If your EZO-CO2 Sensor is solid blue (I2C mode) refer to the Datasheet on how to change modes.Before touching the sensor, touch something with your hand, which is grounded, to discharge static electricity (e.g. a water or heating pipe).

The temperature inside was around 25º at the start and 23º after 10 minutes (it didn't drop much either, so you can see that the window opening wasn't very big either). The code is the most basic and the.hex file is published for the programming of the Arduino with the software Xloader. You don't have to install Arduino software to compile and program the code. If you are searching for Wi-Fi or Bluetooth connectivity, you can find many open source alternatives on a list at the end of the guide, for example CanAirIO. The CO2 meter uses the most popular components on the market, not the most advanced, and the simplest building without the need of an iron solder. Your valuable input helps me to improve the article quality and bring more helpful content in the future.The basic connection of the MH-Z19, MH-Z19B and MH-Z19C sensors is very easy, requiring only four connections. Two for power supply and two for data transmission. Feeding In this article you will find everything you want to know about these sensors (and if you can't find it, ask in the comments). If you power it with a USB power supply/charger you have to put the stabiliser on. YA. These devices do not provide the quality of voltage stabilisation that the MH-Z19C needs, Update the lin below with the value you came up with to complete the calibration. #define ZERO_POINT_VOLTAGE (0.220) //define the output of the sensor in volts when the concentration of CO2 is 400PPM FAQs About The CO2 Sensor And Arduino Projects

When the EZO-CO2 Sensor is first powered on the sensor must warm-up before it can output readings. The warm-up process takes 10 seconds to complete. Granted, the differences observed in the above test measures are very subtle, but we will now see that is a lot worse than it lookedI am not surprised that some people didn't see a problem with those measurements. It is not very difficult for me to know that something is wrong because I have done many, many, many tests with CO2 sensors and I have spent many, many, many hours analysing them. So I have done another test "in the real world" to make it clearer what is going on:This is the first CO2 sensor compatible with Arduino. The output voltage of the module falls as the concentration of the CO2 increases. The potentiometer onboard is designed to set the threshold of voltage. As long as the CO2 concentration is high enough (the voltage is lower than the threshold), a digital signal (ON/OFF) will be released. include //we have to include the SoftwareSerial library, or else we can't use it Stability: NDIR sensors are known for their long-term stability and resistance to environmental factors, such as temperature and humidity.