Rancang Bangun Sistem Pemantauan Kualitas Air Berbasis IoT dengan Sensor TDS dan DS18B20
Abstract
Kualitas air menjadi faktor krusial dalam mendukung kesehatan serta aktivitas masyarakat, sehingga diperlukan pemantauan yang dilakukan secara berkelanjutan. Metode pemantauan manual dinilai kurang efisien dan tidak mampu memberikan informasi secara cepat, sehingga dibutuhkan sistem yang dapat bekerja secara real-time. Penelitian ini bertujuan untuk merancang dan mengimplementasikan sistem pemantauan kualitas air berbasis Internet of Things (IoT) dengan memanfaatkan NodeMCU ESP8266, sensor Total Dissolved Solids (TDS), dan sensor suhu DS18B20. Sistem ini dikembangkan untuk mengukur parameter dasar kualitas air serta memberikan peringatan dini apabila nilai TDS melampaui ambang batas yang ditentukan. Metode yang digunakan meliputi studi literatur, perancangan dan integrasi perangkat keras dan perangkat lunak, serta pengujian kinerja sistem. Data hasil pengukuran ditampilkan secara real-time melalui layar OLED dan aplikasi Blynk, serta dilengkapi fitur notifikasi otomatis sebagai sistem peringatan dini ketika nilai TDS melebihi 500 ppm. Pengujian dilakukan terhadap empat jenis sampel air, yaitu air hujan, air keran, air sumur, dan air isi ulang. Hasil pengujian menunjukkan bahwa sensor TDS memiliki tingkat kesalahan rata-rata sebesar 1,10% dengan hasil pembacaan yang stabil. Selain itu, pengiriman data ke aplikasi Blynk memiliki waktu tunda antara 0,54 hingga 1 detik, sehingga sistem mampu memenuhi kebutuhan pemantauan secara real-time dan fitur notifikasi berfungsi dengan baik sesuai perancangan.
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