Implementasi Internet of Things (IoT) pada Sistem Pengukuran Berat dan Tinggi Badan untuk Penentuan Body Mass Index (BMI) dan Rekomendasi Kesehatan dengan Notifikasi pada Aplikasi Mobile
DOI:
https://doi.org/10.61722/jssr.v4i6.13078Keywords:
Internet of Things, Body Mass Index, ESP32, Firebase, Aplikasi Android, Notifikasi PushAbstract
Pengukuran berat badan dan tinggi badan umumnya masih dilakukan secara manual dengan alat terpisah, sehingga kurang efisien, tidak terdokumentasi, dan tidak disertai rekomendasi kesehatan berkelanjutan. Penelitian ini bertujuan merancang dan mengimplementasikan sistem Internet of Things (IoT) yang mengukur berat dan tinggi badan secara otomatis, menghitung Body Mass Index (BMI), serta memberikan rekomendasi kesehatan dan notifikasi melalui aplikasi mobile Android. Sistem dibangun dengan metode rancang bangun (design and build) menggunakan mikrokontroler ESP32, sensor load cell dengan modul HX711 untuk berat badan, sensor ultrasonik HC-SR04 untuk tinggi badan, LCD I2C, Firebase Realtime Database, dan Firebase Cloud Messaging (FCM). Hasil pengujian menunjukkan error rata-rata pengukuran berat badan sebesar 0,37% dengan koefisien variasi rata-rata 0,26%, serta error rata-rata pengukuran tinggi badan sebesar 0,60 cm. Kalkulasi BMI sesuai 100% dengan perhitungan manual pada seluruh kategori klasifikasi WHO adaptasi Asia, seluruh fitur aplikasi lolos pengujian black-box, dan packet delivery rate mencapai 96,7% dengan waktu respons end-to-end rata-rata 3,05 detik. Sistem ini menunjukkan bahwa integrasi pengukuran otomatis, kalkulasi BMI, rekomendasi kesehatan, dan notifikasi push dalam satu platform dapat berjalan akurat dan andal.
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