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All Journal Journal of Innovation Information Technology and Application (JINITA) Jurnal Inovasi Teknologi Terapan
Yosar Leman
Politeknik Manufaktur Negeri Bangka Belitung
Agriculture, Biological Sciences & Forestry Computer Science & IT Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Engineering Mechanical Engineering

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Development of Prototype IoT-Based Control and Monitoring System for Pakcoy Better Swengky; Lesta; Peprizal; Rian Ardiansyah; Yosar Leman; Aldian Kurniawan
Journal of Innovation Information Technology and Application (JINITA) Vol 8 No 1 (2026): JINITA, June 2026
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jinita.v8i1.3247

Abstract

This research aims to design and develop an Internet of Things (IoT)-based automatic control and monitoring system for hydroponic plants. This system measures, displays, and regulates nutrient parameters, pH, and water volume in real-time to improve water use efficiency, nutrient stability, and plant productivity. The method used is Research and Development (R&D) with a prototyping model. This system integrates an ESP32 microcontroller with a DFRobot pH sensor, a TDS (Total Dissolved Solids) sensor, and an ultrasonic sensor to monitor water levels. Data from the sensors is processed and sent to a cloud database to be monitored and controlled through a website interface. The test results show that the system has high accuracy, with a MAPE (Mean Absolute Percentage Error) value for the pH sensor of 6.06% (93.94% accuracy), a TDS sensor of 4.81% (95.19% accuracy), and an ultrasonic sensor of 7.98% (92.02% accuracy). All MAPE values ​​are within the <10% range, indicating good system performance for automated monitoring applications. This system implementation provides an innovative solution to the limitations of conventional, manual hydroponic systems. It can serve as an initial model for the future development of IoT-based precision agriculture.
Analisis Kompensasi Daya Reaktif terhadap Faktor Daya Motor Induksi Menggunakan Bank Kapasitor Yosar Leman; Sasha Avrilia; Surojo Surojo
Jurnal Inovasi Teknologi Terapan Vol. 4 No. 2 (2026): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v4i2.467

Abstract

Induction motors are the most widely used electrical machines in industry and are classified as inductive loads that absorb significant reactive power, resulting in a low power factor. A low power factor increases line current, causes greater distribution losses, and may incur penalty charges from utility companies. This study experimentally analyzes the effect of a switchable capacitor bank on the power factor and line current of a three-phase slip-ring induction motor under three loading conditions (M = 1.6 Nm, 1.8 Nm, and 2 Nm) at a supply voltage of 380 V / 50 Hz. Eight capacitor bank switching levels ranging from 0 to 1,350 VAR were tested. The results show that the power factor improved significantly from 0.23–0.28 (no compensation) to 0.53–0.55 at the optimal level (1+2+3+4), while the line current decreased by up to 53% from 1.57–1.72 A to 0.73–0.82 A. The motor current remained unaffected by compensation, confirming that capacitive compensation only reduces reactive current on the supply side. Over-compensation was also observed when excessive capacitance was applied, causing the power factor to deteriorate. These findings confirm that proper capacitor bank sizing is critical and must match the reactive power demand at each load condition.
Co-Authors Aldian Kurniawan Better Swengky Lesta Peprizal Rian Ardiansyah Sasha Avrilia Surojo