https://jurnal.unugha.ac.id/index.php/jnc <p style="text-align: justify;">JOINICS (Journal Of Informatics and Computer Sciences), dengan e-ISSN: /p-ISSN: merupakan jurnal yang berisi artikel tentang ilmu komputer yang merupakan karya para dosen, mahasiswa dan peneliti. Jurnal JOINICS&nbsp; (Journal of Informatics and Computer Sciences) : Jurnal Informatika dan Ilmu Komputer diterbitkan oleh Fakultas Matematika dan Ilmu Komputer UNUGHA Cilacap.&nbsp;</p> Universitas Nahdlatul Ulama Al Ghazali Cilacap en-US Journal of Informatics And Computer Sciences https://jurnal.unugha.ac.id/index.php/jnc/article/view/1965 <p><em>Door access security plays a crucial role in protecting restricted areas, particularly by addressing the limitations of conventional locking mechanisms, which are vulnerable to key duplication and forced entry. This study aims to design and evaluate a smart door lock prototype based on an Arduino microcontroller that implements two-factor authentication by combining RFID cards and a PIN entered via a keypad. The system was developed using a prototyping approach, allowing the design and testing processes to be conducted iteratively in accordance with predefined functional requirements. System evaluation was carried out through black-box testing to verify functional correctness based on input–output relationships, as well as User Acceptance Testing (UAT) to assess user acceptance of the system’s performance. The evaluation results show a success rate of the test results (UAT) of 92.2%, demonstrating that the dual authentication mechanism effectively restricts door access by requiring both RFID card verification and a valid PIN before activating the door lock solenoid. In addition, the system provides immediate access feedback through an LCD display and a buzzer indicator. Based on these findings, the developed system shows potential as a more controlled and reliable alternative to traditional door locking mechanisms within the evaluated usage context.</em></p> Dimas frandika Copyright (c) 2026 Journal of Informatics And Computer Sciences 2026-09-08 2026-09-08 4 1 1 11 https://jurnal.unugha.ac.id/index.php/jnc/article/view/1920 <p>Penggunaan Air Conditioner (AC) yang tidak efisien sering menyebabkan pemborosan energi dan biaya tinggi. Penelitian ini merancang sistem pengontrol AC universal berbasis NodeMCU ESP8266 dengan teknologi Internet of Things (IoT) yang terintegrasi aplikasi mobile. Sistem menggunakan komunikasi inframerah (IR) sehingga kompatibel dengan berbagai merek AC dan memungkinkan kontrol jarak jauh secara real-time melalui smartphone. Metode prototyping diterapkan melalui tahapan desainan, implementasi, dan pengujian. Hasil menunjukkan sistem mampu menyalakan, mematikan, serta mengatur suhu dan mode AC dengan waktu respon 1–2 detik, tingkat keberhasilan di atas 90%, konsumsi daya rendah, serta koneksi Wi-Fi stabil. Aplikasi seluler juga dinilai sederhana dan mudah digunakan. Rumah Sistem ini menawarkan solusi praktis untuk mengontrol AC multi-merek, mendukung efisiensi energi, konsep rumah pintar , dan memasukkan ke dalam lingkungan.</p> <p>Kata Kunci : Pengendali AC universal; NodeMCU ESP8266; IoT; aplikasi mobile; metode prototyping</p> Hasbi RiasHasbiWahab Copyright (c) 2026 Journal of Informatics And Computer Sciences 2026-01-08 2026-01-08 4 1 12 19