 You can build a CO2-sensing project using Adafruit I.O. and Whippersnapper. Inspired by canaries and coal mines, this metaphor has become an iconic way to depict warning signs. With Adafruit I.O. you can build a dashboard to log and monitor an air quality sensor. Using Whippersnapper, you can easily set up an ESP32 Wi-Fi dev board and an SCD-40 CO2 air quality sensor. There's no coding required so you don't need to know Arduino, Python, command lines, or even an IDE. Now you can use servos and trigger them whenever the air quality reaches high values. You have controlled the servo and can change the angle of the horn by adjusting a slider. We set up an action to trigger the servo whenever the CO2 level reaches high values. Then choose to publish a message to the servo with a value that matches your desired angle. The setup is really easy to put together and it's free for folks to play around with. You can get the parts to build this project, links are in the description. Download and 3D print the parts to build the enclosure and the articulating bird. The Qtipi ESP32 snap fits into this little holder and gets secured to a mount for housing the servo. Be sure to check out the step-by-step tutorial by heading over to the Adafruit Learn Guide. The SCD-40 is mounted with screws and the servo press fits into the mount. The sensor easily plugs into the Qtipi thanks to the built-in Stema Qt connectors. This 3D printed horn fits over the shaft of the motor and is secured with additional hardware. Now we can slide the circuit into the housing with the sensor poking out of the cutout. Assemble your friendly bird by joining the two wings to the body and create a rivet by heating up the tip of the pin. The wings freely rotate allowing our bird to appear sad when it's upside down and happy when it's upright. The bird can then be press-bitted into the shaft of the servo and the circuit can be powered over USB-C. We hope this inspires you to check out Whippersnapper and Adafruit IO for your next IoT project.