Abstract

• Physical data can be sending (writing) to or receiving (reading) from the web server using ESP32 which is a device of combination of microcontroller and Wi-Fi, generally. Physical data such as temperature, humidity and voltage are detected (read condition) from the DHT11 sensor and potentiometer by using microcontroller and these are monitored on web page. And then, the home appliance can be controlled by the touching or clicking the word or symbol on the web page on laptop or smart phone as writing action. In this research, a LED is controlled instead of the home appliance and the potentiometer is used behalf of voltage source to be measured. ESP32 is compatible to Arduino IDE but ESP32 board is not included in Arduino IDE as default. The board is installed in the IDE. Coding composes of data writing to / reading from web, connecting to web server and web page management. Web page is created by using hypertext markup language (HTML).