The objectives of this research are: 1) develop the digital door lock prototype with the Internet of Things in conjunction with web application, and 2) evaluate the performance of the proposed prototype. Research tools include the experimental tool and data collection tool. The experiment tool is the prototype of the digital door lock device with the Internet of Things in conjunction with web application, developed by C/C++, Java Script, HTML, CSS connected to MySQL database. Arduino IDE is used to control NodeMCU ESP8266, LCD monitor, analog read fingerprint sensor, Arduino Uno, keypad, and electric lock. Data collection tool is a system efficiency assessment form. The project implemented according to 5 steps of software development life cycle concept: 1) problem and requirement Analysis 2) system design, 3) system development, 4) system testing, and 5) evaluation by 5 experts selecting from purposive sampling.

The result of the project development was found that 1) the digital door lock prototype with the Internet of Things in conjunction with web application successfully operated according to safety and security objectives, and 2) the efficiency of the proposed system evaluated by five experts is in highest level (=4.61, S.D.=0.42).