У вашего броузера проблема в совместимости с HTML5
Our prototype SpeakEasy Text-To-Speech (TTS) Shield "talking" out the temperature and humidity readings. The code could use some optimization, but we wanted to give a demo of it's possibilities. The relays are now connected for HVAC control. See more at http://arduinotronics.blogspot.com/2013/07/sainsmart-18-lcd-dht-22-temp-humidity.html