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Universitas KH. A. Wahab Hasbullah
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Journal : computer journal

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Sistem Monitoring Level Air Galon Berbasis IoT Menggunakan Sensor Berat (Load Cell) Alina Rusmiza; Sujono Sujono
Computer Journal Vol. 4 No. 1 (2026): February
Publisher : Yayasan Pendidikan Mitra Mandiri Aceh (YPMMA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58477/cj.v4i1.354

Abstract

This study develops an Internet of Things (IoT)-based monitoring system to measure water levels in gallon containers using a load cell as the primary weight sensor. The system enables users to monitor remaining water in real time and prevent unexpected shortages during daily activities. The method involves assembling hardware consisting of a load cell and an ESP32 microcontroller, followed by a calibration process to ensure accurate weight measurements. Programmed through the Arduino IDE, the ESP32 wirelessly transmits processed sensor data to a cloud platform such as Google Sheets or a hosting service for storage and management. Water levels are visualized through a web-based dashboard that presents data in a clear and accessible format. A notification feature alerts users when the gallon reaches a predefined minimum threshold. Experimental results show that the sensor consistently detects weight changes with stable performance throughout the monitoring process. The dashboard successfully displays real-time data reflecting the actual gallon condition. Overall, the system offers an effective and practical solution for automated water-level monitoring in households, offices, and small businesses.
Implementasi Sistem Peringatan Banjir Dini dengan Sensor HC-SR04 Berbasis ESP32 Internet of Things Sujono Sujono; Muhammad Rusli M
Computer Journal Vol. 4 No. 1 (2026): February
Publisher : Yayasan Pendidikan Mitra Mandiri Aceh (YPMMA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58477/cj.v4i1.385

Abstract

Floods are natural disasters that often occur in Indonesia and sometimes cause great material and human losses. This paper describes the design and implementation of an IoT-based flood early warning system using ESP32 microcontroller and HC-SR04 ultrasonic sensor technology. The system is capable of automated river water level measurements at 5 minutes interval with real-time data sent to a web-based monitoring dashboard. Field validation was conducted in a quantitative experimental study at a river dam facility located in Jombang Regency. Performance testing results show that the system has high reliability, achieving 98.63% data transmission success rate. The HC-SR04 sensor has measurement accuracy of 97.69% with Mean Absolute Error (MAE) value equal to 2.31%. The warning mechanism works by comparing the water level with certain thresholds so that the dashboard can display safe or alert status conditions based on measurements made by the HC-SR04 sensor. Experimental results prove that this system is effective and economically feasible as a flood early warning solution for vulnerable regions, enhancing disaster preparedness capabilities significantly.
Implementasi Sistem Keamanan Nirkabel Berbasis IoT Menggunakan Sensor Laser, ESP32, dan Platform ThingSpeak untuk Deteksi Intrusi Ruangan Mohammad Roziqin; Sujono Sujono
Computer Journal Vol. 4 No. 2 (2026): August
Publisher : Yayasan Pendidikan Mitra Mandiri Aceh (YPMMA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58477/cj.v4i2.405

Abstract

Indoor security has become an increasingly important concern as digital technology continues to advance. Traditional alarm systems face two recurring limitations: the inability to support remote monitoring and the tendency of conventional motion sensors to produce false alarms under varying ambient temperatures. This study designs a room intrusion detection system using a laser beam as the trigger mechanism and an ESP32 microcontroller as the IoT-based control unit. The hardware implementation employs a Light Dependent Resistor (LDR) sensor with a 10-sample averaging technique to reduce signal noise, combined with hysteresis logic operating within a threshold range of 800 to 1100. The system is connected to the ThingSpeak cloud platform to enable real-time status updates. Testing across five lighting scenarios shows that the system reliably detects laser interruptions when LDR readings fall below 720 and returns to a safe state once readings exceed 1100. Security status updates were transmitted to the ThingSpeak dashboard with consistent HTTP responses (status code 200) for each condition change. These results indicate that ESP32 offers practical advantages in wireless connectivity and energy efficiency for a low-cost room security solution.
Pemantauan Iklim Mikro Greenhouse Berbasis ESP32 dan Internet of Things (IoT) untuk Mendukung Pertanian Cerdas Ardy Putra Ristiansyah; Sujono Sujono
Computer Journal Vol. 4 No. 2 (2026): August
Publisher : Yayasan Pendidikan Mitra Mandiri Aceh (YPMMA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58477/cj.v4i2.440

Abstract

The microclimate inside a greenhouse, especially temperature and humidity, must be monitored continuously to maintain conditions that support optimal plant growth. However, manual monitoring is often time-consuming, susceptible to human error, and can cause delays in decision-making. To address these issues, this study developed an Internet of Things (IoT)-based monitoring system using an ESP32 microcontroller and a DHT22 sensor. The DHT22 measures temperature and relative humidity, and the ESP32 processes the readings and sends them through a Wi‑Fi connection. The data are then visualized in real time on a Blynk dashboard accessible via a smartphone, enabling remote observation of environmental changes without requiring physical presence in the greenhouse. System testing was performed in a simulated greenhouse environment to evaluate sensor reading behavior, communication reliability, system stability, and the continuity of data updates. The results indicated that the dashboard refreshed automatically with an average delay of about 1 to 3 seconds. Overall, the proposed ESP32-based solution is simple, low-cost, and practical for greenhouse microclimate monitoring. It can serve as a foundation for further development toward automated monitoring and control by adding more sensors, improving data processing, and integrating control actuators.
Co-Authors Abdul Azis Abdur Rozaq Achmad Agus Athok Miftachuddin Achmad Sulthon Hadi Ade Nur Rahman Adela Fiatindra Agasti Adrian Yoga Permana Ady Luthfi Santosa Agus Sifaunajah Agus Suhadi Ahmad Bichar Khozainul Abar Ahmad Fadlul Khasan Ahmad Insani Asadullah Ahmad Khusnul Hakim Aji Setyo Hartono Prawoto Akbar Kuntara Alidin, La Ode Asfahyadin Alina Rusmiza Alvina Mita Iknawati Alya Akmala Luthfiani Farras Amin Awal Amaruddin Anastasia Lirina Andria Sari Anita Rahmawati Anti Qurrota A'yuni Apriliana Ardiansyah Ardiansyah Ardy Putra Ristiansyah Ardyono Priyadi Ari Amir Alkodri Arinda Nurul Fitriah Arjuna Andriyanto Cahyo Nugroho Asep Khairul Faizin Ashlihah Asman Assidiqi, Rohmatullah Aufia Aisa Aulia Maulidiana Bagus Rahmadi Supancana, Ida Benny Wijaya Bima Imansyah Brososaputro, Goenawan Budi Harsono Budi Prasetyo Cahyo Indarti Casmudin Chika Ghianistika Choirul Anam Chrisna Putra, Rendy Rian Chusnul Chotimah Cris Kuntadi Damayanti, Era Rizqi Deden Deni Mahendra Devri Bayu Perdana Putra Dian Novianto Dian Novianto Diana Khusniyah Diding Rahmat Dinan Izzazi Zatalini Dwi Agung Sunaryo Dwi Iksanudin Dyah Ayu Sri Hartanti Effendi, Zara Elmi Iflahah Emi Endang Sulastri Erdi Masyudi Fajar Nur Trengginas Firda Arya Dinata Firdaus Firdaus May Sulvani Gintar Hasugian Goenawan Brotosaputro Habib Habib HAMIDAH Hariono, Tholib Hendi Hengki Herina Hikmatul Hasanah Hilyah Ashoumi I Made Dwika Widhitama Ifham Adlan Igo Ardiansyah Ikhwan Syahdi Imam Bukhori Ino Angga Putra Isyatir Rodliyah Mahmudah Japriadi, Yohanes Setiawan Jauhar Imtikhan Joko Sudibyo Juharsah Khairunnusa’ Nur Muslimah Lailatul Jannah Laili Yunizhar Laily Mufarrohah Lang Elang Timur Demokrat Lintang Ratri Handaru Putri Listiyorini Lorensa Dian Anggrain Lukas Tommy luluk, syeril Luqman Nur Huda M Rio Andika M. Abdul Jalil M. Adam Zuhrial M. Faisal Kahfi M. Malik Fajar Amrullah M. Sholahuddin Al Ayyuby M. Zaki Mubarok Mahzia Ulhaq Almukhofi Margo Pujiantara Maulidi Mauridhi Hery Purnomo Mega Sulistyo Meilia Prehartanti Memik Nor Fadilah Miftahul Ulum Mochamad Yusak Nur Machmudi Mochammad Iqbal Aldiasyah Mochammad Rizqi Albani Moh Sholeh Afyuddin Moh. Anshori Aris Widya Moh. Faridl Darmawan Mohamad Anshori Aris Widya Mohammad Deffan Afandi Mohammad Fatchulloh Mohammad Ghazi Al Ghifari Mohammad Hufait Ibri Al Fahhiz Mohammad Ikhfian Mahmud Mahmud Mohammad Misbakhus Surur Mohammad Roziqin Mokhamad Jamaluddukha Mokhammad Saifulloh Al Aziz Muchammad Iqbal Aprilianto Muhamad Bahrul A’lam Muhamad Iqbal Nasrullah Muhamad Khoirur Roziqin Muhammad Al Ghozali Muhammad Ansori Aris Muhammad Bagus Cahyo A. Muhammad Faizal Basri Muhammad Jaza Ilham Asy’ari Muhammad Nur Iman Nudin Muhammad Rusli M Muhammad Saiful Ayub Muhyiddin Zainul Arifin munawarah Munawaroh Munawaroh Nanda Pratama Widya Iswara Nasirudin, Mohamad Nasrulloh, M Farid Novan Maulana Novi Astuti Indra Paranita Novianto, Hernawan Nur Hasannudin Nur Khafidhoh Nur Khafidoh Nur Khafidoh Nurul Yaqin Primaadi Airlangga Putu Sugiartha, I Gede Qorirotul Aini Zudlan Qurotul Ainiyah Rachmawan Budiarto Rahmat Aris Mujahidin Rangga Adi Setiawan Rias Janathun Qolbi Ridha Hanifah RIKI NURFALAKHI Rina Dewi Febrianti Riska Damayanti Rizal Adi Siswanto Rizka Wulan Rahmadianti Rizky Pratama Putra Karo Karo Rizky Syam Putra Wahyudi Rizqi Maulidia Rohmatulloh Rohmatulloh Sahrul Ramdani Saiful Anam Salim Ashar Salsabila Khulukin Hasanah Samsudin Samsudin Sandjaya, Alfath Sari, Melinda Novita Sarwindah Septian Ragil Anandita Setiawan Japriadi, Yohanes Shoimaturrodliyah Shoimaturrodliyah Sidhiwaskita, I Gusti Agung Bagas Sinarwaty SITI FATIMAH Siti Nurlaela Siti Sufaidah Siti Sulaikho Subkhi Dendi Pratama Sudarto Sudarto Sudarto Sundaru Jati SUNGKONO SANUSI Sutrisno Sutrisno Syafi’uddin Syafi’uddin Syarif Narullah Wahyunugroho Taufik Eko Yulianto Tri Rahayu Kusumaningsih Tri Siswoyo Tulus Prasetyo Umi Baroroh Umi Kulsum Nur Qomariah Ummi Uswatun Khasanah Urfi Hannan Mubarok Wahyu Adi Prakasa Wahyuniati Hamid Wanda Putri Noviati Widyatama, Alfian Wisnu Aryo Dewanto Wuri Cahyanti Yusril Hendra Maulana Zakiyyudin Zein Sgn, Subhan Zulfikar Zulfikar Zulfikar Zulfikar