Implementasi Modul SIM808 untuk Konektivitas GSM pada Prototipe Sistem Peringatan Dini Banjir Berbasis IoT

Abstract

Ketiadaan Wi-Fi dan fluktuasi sinyal GSM di lokasi pemantauan dapat mengganggu pengiriman data pada sistem peringatan dini banjir berbasis IoT. Penelitian ini bertujuan mengimplementasikan modul SIM808 sebagai konektivitas GSM/GPRS serta menganalisis kinerjanya berdasarkan Received Signal Strength Indicator (RSSI), Packet Delivery Ratio (PDR), dan packet loss. Sistem mengintegrasikan ESP32-S3, sensor JSN-SR04T, MQTT, RTC DS3231, dan SD card untuk penyimpanan data lokal saat koneksi tidak tersedia. Pengujian dilakukan selama lima hari di Kali Ciluar dengan interval 10 menit dan menghasilkan 720 data. Hasil menunjukkan RSSI rata-rata sebesar -71,09 dBm dalam kategori good. Pengiriman langsung mencapai 94,44%, sedangkan 5,56% data mengalami penundaan dan dikirim kembali setelah koneksi tersedia. PDR akumulatif mencapai 100% dengan packet loss 0% atau kategori Sangat Bagus menurut TIPHON. Hasil tersebut menunjukkan SIM808 mendukung pengiriman data dan menjaga keutuhan data selama periode pengujian.

Limited Wi-Fi access and GSM signal fluctuations may disrupt data transmission in IoT-based flood early warning systems. This study aims to implement SIM808 as a GSM/GPRS connectivity module and analyze its performance using Received Signal Strength Indicator (RSSI), Packet Delivery Ratio (PDR), and packet loss. The system integrates an ESP32-S3, JSN-SR04T sensor, MQTT, RTC DS3231, and SD card for local data storage when connectivity is unavailable. Testing was conducted for five days at the Ciluar River with a 10-minute interval, producing 720 data records. The average RSSI was -71.09 dBm, categorized as good. Direct delivery reached 94.44%, while 5.56% of the data experienced delays and were sent after connectivity was restored. The cumulative PDR reached 100% with 0% packet loss, categorized as excellent under the TIPHON standard. These results indicate that SIM808 supports data transmission and maintains data integrity during the test period.