Arduino Uno project that utilizes DH22 sensor for sensing temperature and humidity, Ethernet Shield for connecting the ethernet, a buzzer that beeps periodically when set values are exceeded, triggers a relay when a set humidity or temperature is exceeded (I turn on the A/C with the relay) and responds to JSON requests (temperature, humidity and A/C on or off)
Links to extrenal libraries used: https://bitbucket.org/fmalpartida/new-liquidcrystal/wiki/Home https://github.com/Wiznet/WIZ_Ethernet_Library https://arduinojson.org/ https://github.com/adafruit/DHT-sensor-library https://github.com/adafruit/Adafruit_Sensor
I have another version which keeps the relay on while the limits are exceeded. I can upload it as well if requested.