This cute air quality monitor uses facial expressions to alert you if your air quality drops. Components needed to build include an esp32c3, OLED display, DHT22 sensor, and air quality sensor.

Although there is already an Arduino Wi-Fi shield the WifiDuino device has been designed with a smaller form factor in mind, is more reasonably priced and has been created to be a lot easier to use.

Do you desire a teeny, tiny, little Arduino board with OLED display? You bet you do! Microview is a new "chip-sized" Arduino on Kickstarter that costs $45. What can it do? All kinds of stuff!