A weather station that allows you to measure the temperature, humidity, carbon dioxide and oxygen concentration and also the light level (brightness). P.S. Sometimes my WiFi goes down, due that fact, my weather station loses some data... Sorry for that!
Opensenses #2 at Futuragora Opensenses project. Meteo sensor + Aquarium monitor. Sensors: Meteo - Temperature, Pressure, Humidity; Aquarium - Temp, PH
Estação Meteorológica da Escola Paulo da Gama - Seixal (http://www.aepg.pt/)
Medição de temperatura e humidade na sala. Com sensores DHT11 e si7021