Development of Air Conditioner Control System via Web Browser

Abstract

This research aims to develop an air conditioner control system through a smartphone or computer by applying the NodeMCU ESP8266 microcontroller board and designing a program to control the system’s operation. Through each operation button, the remote controller of air conditioner is replaced by sending coded infrared signals of air conditioner control, and the controller realizes the steps by reading data from humidity and temperature sensor (DHT11), motion detection module (HC-SR501) and voltage and current sensor (PZEM-004T). Then, the data is sent to be processed on the NodeMCU ESP8266 microcontroller board to send to a web application program developed with PHP script, saved to the MySQL database, and displayed on the application. Web browser with PHP, CSS and JavaScript scripts in HTML language for precise control of the system via smartphone or computer. Testing whether the values ​​can be displayed includes 1Air conditioner temperature value 2. A message indicating the on-off status and the current mode is on. 3. Temperature increase-decrease buttons. 4.On-Off button Cool mode to Dry mode 5. Humidity in room. 6. Temperature value in room. 7. Browse history page button, and the air conditioner will turn off when no person is in the room.