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Hafni
Universitas Pembangunan Panca Budi
Computer Science & IT Decision Sciences, Operations Research & Management

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Prototype Design Of Flood Detection System Based On Arduino Uno For Home Environment Irfan Mulya Syahputra; Rahmadani; Hafni
Bahasa Indonesia Vol 17 No 12 (2026): Instal : Jurnal Komputer
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jurnalinstall.v17i12.470

Abstract

Flooding is a hydrometeorological disaster that frequently occurs in Indonesia and causes significant impacts on residential areas. The limitations of early warning systems at the household scale often result in communities being late in taking preventive actions. This study aims to design and develop a prototype of a flood detection system based on Arduino Uno that is capable of providing early warnings through a buzzer and displaying water level information on an LCD. The system uses an HC-SR04 ultrasonic sensor to measure water surface levels in real time and classify them into three conditions, namely safe, alert, and danger. The research method employed is a design-and-build method with an experimental approach. Testing was conducted in a simulated environment with variations in water level up to 10 cm. The test results show that the system is able to detect changes in water level consistently with relatively small measurement deviations and provide warning responses according to the specified thresholds. This prototype is expected to serve as a simple, economical, and easily implementable solution for a flood early warning system in residential environments.
Design of an Anti-Intruder Security Sensor on a Home Door Based on the Internet of Things Using a Reed Switch Sensor (Magnetic Door) and a NodeMCU Microcontroller Muhammad Balkis Delpiero; Muhammad Muttaqin; Hafni
Bahasa Indonesia Vol 17 No 12 (2026): Instal : Jurnal Komputer
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jurnalinstall.v17i12.473

Abstract

Home security is an important aspect of modern life, especially in the digital era that demands efficiency and ease of monitoring. The development of Internet of Things (IoT) technology has opened up great opportunities in the development of smart home security systems. Based on these conditions, this study aims to design and implement an Internet of Things (IoT)-based home door security system by utilizing a Reed Switch sensor (magnetic door) and a NodeMCU ESP8266 microcontroller. The Reed Switch sensor functions to detect the door status, both in open and closed states, while the NodeMCU ESP8266 is used as a control center that processes sensor data and sends notifications in real-time via Telegram Bot. The research method used is Research and Development (R&D) which includes the stages of system analysis, design, implementation, testing, and evaluation. The test results show that the system is able to detect changes in door conditions well and send notifications quickly and accurately to users. In addition, the system can operate stably for a fairly long period of time without significant problems. Therefore, the IoT-based door security system developed can be used as an additional security solution that is effective, easy to implement, and economical to improve home security.
Design of a Web-Based Medical Warehouse Inventory System at Bhayangkara TK-II Hospital Medan Siholnang Sitindaon; Hafni; Muhammad Zen
Bahasa Indonesia Vol 18 No 01 (2026): Instal : Jurnal Komputer
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jurnalinstall.v18i01.478

Abstract

The development of information technology has driven a transformation in healthcare service management, including in the management system of medical warehouse inventory in hospitals. Bhayangkara Hospital TK II Medan, as a referral hospital, has complex and ongoing medical logistics needs, requiring an effective and accurate inventory management system. However, inventory systems that are still manual or semi-computerized pose various problems, such as discrepancies between stock data and physical conditions, delays in information on item availability, difficulties in monitoring expiration dates, as well as the risk of stock shortages or overstocking. This study aims to design a web-based medical warehouse inventory system capable of managing data centrally and in real-time. The research methods used include system requirements analysis, system design, and web-based system implementation. The results of this study are expected to produce an inventory system that facilitates recording of incoming and outgoing goods, monitoring of stock and expiration dates, and the presentation of accurate reports. With this system, it is anticipated that the management of the medical warehouse inventory at Bhayangkara Hospital TK II Medan will become more effective and efficient and support improvements in healthcare service quality.  
Co-Authors Irfan Mulya Syahputra Muhammad Balkis Delpiero Muhammad Muttaqin Muhammad Zen Rahmadani Siholnang Sitindaon