Jurnal Jaringan Telekomunikasi E-ISSN: 2654-6531 P- ISSN: 2407-0807 Vol. 12, No.1 (2022)5–11 5 Weather Condition Monitoring System as A Floods Prevention in Malang using Android Application Audia Yumna Dita Pramesti 1 , Farida Arinie Soelistianto 2 , Lis Diana Mustafa 3 1,2 Digital Telecommunication Networks Study Program 3 Telecommunication Engineering Study Program Department of Electrical Engineering, State Polytechnic of Malang, Malang, Indonesia 1 audiayumnadita@gmail.com, 2 farida.arinie@polinema.ac.id, 3 lis.diana@polinema.ac.id Abstract— On January 2021 rain often splashing Malang City with intensity high and deep period a long time, so some areas experience flood. BMKG is an Indonesian official institution in charge to give information forecast weather good through online media nor offline. However, they do not give specific information about real-time location weather. This study aims to make it easy for user in accept information on bulk rain, water level, wind speed and temperature as effort to prevent flood. This study proposed prototype using bulk sensor rain, water level, wind speed and temperature as well as using ESP32 as microcontroller with monitoring via android. This tool could put in general place or in a vulnerable flood area. Results show that sending data from ESP32 microcontroller to firebase database is successful sent through "AVRO POLINEMA" Wi-Fi connection. QoS performance between ESP32 to Firebase shows throughput = 7.076368 Kb / s (poor), packet loss = 0.5% (very good), delay = 250,582 s (good), jitter = 0.0299139 ms (good) and between Application to Firebase got results throughput = 32.24112 (medium), packet loss = 0.4% (very good), delay = 118.009 ms (very good), jitter = 0.0903578947 ms (good). Keywords— Android, BMKG, Firebase, Rainfall, Monitoring. I. INTRODUCTION Malang City is a a region located in the Province of East Java. In general, the Malang Raya area is surrounded by mountains fiery in the east and west, while in the South consist from hills aged tertiary and southern Indonesian seas. Various condition this disaster-prone, including eruptions Mountain fiery, potential land landslide, flood flash, and earthquake earth [1] . The Meteorology, Climatology and Geophysics Agency (BMKG) is a official Indonesian institution which serves information for monitor weather and climate in Indonesia. For weather information, BMKG work together with a number of weather station monitor in a number of important point in Indonesia. Information about forecast weather and climate every day will be delivered to public through online media such as websites, apps weather on smartphone , radio, television even offline media as newspapers and some type of print media other [2]. Because of the existing system now not yet apply real-time information, moreover the registration of vulnerable flood locations still use manual map[3] or should look for information through online and offline media. The development existing technology is expected to help public by giving information about limit of heavy rain intensity, water level, wind speed and environment temperature. Based on the above problem, then Writer will propose “Weather Condition Monitoring System as A Floods Prevention in Malang using Android Application”. The system could send information on smartphones applications in the form of map location of the tested area, bulk rain intensity, wind speed, water level, and environment temperature around location. The system will be used to monitor weather condition at the rain and drought season. As for the important parameters is bulk rain intensity, wind speed and water level. For the coordinate of tested area, is taken from Google Maps II. LITERATURE REVIEW A. Microcontroller (ESP32) ESP32 Wi-Fi module is a latest wifi development board of ESPs that use the ESP32 chip. Besides give connection wifi, module it also gives Bluetooth connection BLE equipped with a dual core 32bit MCU. This Wi-Fi Module has voltage 3.3V so that to make electronic using ESP32 user must notice that the electricity supply in the circuit cannot more than 3.3V [4]. Figure 1. Microcontroller (ESP32)