The development of technology today has evolved rapidly, especially in the field of use of electronic equipment. Electricity saving is an indispensable tool in this case is the air conditioner. The impact of the metropolitan City One of them is the air conditioner device in the classroom of the university Raharja electricity needs energy saving. The use of uncontrolled air conditioning resulted in electricity waste. Therefore it is necessary to have a tool to facilitate the user in operating the air conditioner device that can be automation by using ESP8266, LED Infrared Transmitter, RTC sensor and DHT22 sensor. The methods used in this study were observations, interviews, and library studies from various research sources. The conclusion of this research is that it is necessary to create new modern systems and automation so that they can be controlled at any given time and minimize the use of excessive power.<br>Keywords: air conditioner, Arduino, and Raharja University.
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