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I Putu Wahyu Pranata Kusuma Jaya
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Earth & Planetary Sciences Electrical & Electronics Engineering Environmental Science Materials Science & Nanotechnology Physics

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Rancang Rancang Bangun Sistem Pendeteksi Ketinggian Air Jarak Jauh Menggunakan Sensor HC-SR04 dan Modul GSM SIM800L Berbasis Mikrokontroler ATMega 328 I Putu Wahyu Pranata Kusuma Jaya; I Gusti Agung Widagda; I Gde Antha Kasmawan
BULETIN FISIKA Vol 24 No 1 (2023): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2023.v24.i01.p05

Abstract

A prototype of water level detection has been designed using the HC-SR04 sensor and the GSM SIM800L module based on the ATMega328 Microcontroller. This study aims to monitor the water level through indication media such as LED colors and different buzzer sounds. In addition, the communication medium between the user and the design tool is using SMS. Users can also control the Relay and provide information in the form of current water levels via SMS. The components used to design this system are Arduino Uno, sensor HC-SR04, GSM SIM800L Module, LCD, LED, buzzer and Step-Down regulator. The principle of this system is the system will indicate the water level through predetermined statuses, such as safe, alert and dangerous. Each status has a different LED color and buzzer sound. When the water level reaches the threshold value for each status, the design tool will send a message to the user in the form of the current status and water level. When the water level reaches dangerous status, the relay will turn on and off when the water level reaches safe status. Based on the standard deviation value, the designed tool has a fairly small standard deviation between 0-0.2 cm so that the tool is said to be quite precision. Meanwhile, based on the results of the calibration test between the read distance on the LCD and the ruler, the coefficient of determination is 0.9996 or 99.96% and SMS with the ruler obtained 0.9997 or 99.97%. This indicated that the designed tool has good accuracy.
PEMBUATAN ALAT PANTAU SUHU DAN KELEMBABAN UDARA BERBASIS SHORT MESSAGE SERVICE (SMS) MENGGUNAKAN AWE.2020 I Putu Wahyu Pranata Kusuma Jaya; I Gusti Agung Widagda
BULETIN FISIKA Vol 22 No 1 (2021): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2021.v22.i01.p03

Abstract

It has been successfully created a device that can monitor the temperature and humidity of air through a mobile-based Short Message Service (SMS) with the name is AWE.2020. This tool consists of DHT22 temperature and humidity sensor, a GSM SIM800L module, and an Arduino Uno R3 microcontroller. The temperature and humidity readings will be processed by the Arduino Uno R3 microcontroller and the result will be sent as an SMS via GSM SIM800L module. To measure the accuracy of the prototype device (AWE.2020) a calibration was done with existing standard AWS device at Jembrana Climatology Station, Bali. Several parameters are used to measure the accuracy of this measuring instrument, such as regression analysis and statistical t-test. The performance of AWE.2020 depends of the signal quality of the provider. When the signal is good, the result of t-test and regression analysis of this tool show a high degree of accuracy; and vice versa. From the observations, as well as statistical t-tests it was found that the tool was accurate and precise to use but depends on provider signal which is used for.
Co-Authors I G. A. Widagda I Gde Antha Kasmawan