RESERVOIR WATER LEVEL MONITORING SYSTEM USING ULTRASONIC SENSOR

RESERVOIR WATER LEVEL MONITORING SYSTEM USING ULTRASONIC SENSOR AND SHORT TEXT MESSAGES (SMS) Yusran Timur Samuel, Antonius Maryo Manurung, Elmor Wagiu Faculty of Information Technology, Universitas Advent Indonesia

INTRODUCTION • Universitas Advent Indonesia constantly acquire water from the water springs around the closest mountains in order to fulfill the needs of all people within the campus area. The water collected from the water springs first stored in a reservoir and later transfered to the campus through networks of pipes. • Condition : • The distance between the campus and the reservoir is quite far • Lack of decent infrastructure around the area makes it difficult, even for a motorcycle to access the location of the reservoir • Therefore, it is quite difficult to monitor the water level

• Monitoring the water level in the reservoir is very important because : • Shows the input and output of the water in the reservoir • Shows the status of the reservoir itself. • if the water level is too high, it mean that there is a jammed inside the pipes that distributes the water. • if the water level is too low, that means there’s hindrance occured in the input system in the reservoir • All this time, some staff from the campus periodically came to the reservoir on person to check on the water level. But following the circumstances in which the lack of decent infrastructure and disctance, it is not practical and a waste of time. • Therefore, the campus needed a system in which it monitors the water level from a distance, so that the staffs will get notification about the reservoir status

PURPOSES OF RESEARCH • Based on the problems, this research was conducted to build a system using a microcontroller equipped with sensors that can monitor the height of the water and if the water level is beyond the threshold in the set, then a short message will be sent to water maintenance staffs, by using of integrated modem with microcontroller.

DESIGN SYSTEM The sensor detects the heights of the water surface in the reservoir. Monitoring results will be given to the microcontroller The microcontroller will periodically monitor the information provided by the sensor Short Message Service If the water level is less than 3 meters, then the microcontroller will command GSM modem to send a message to the water maintenance staffs in the maintenance department Reservoir Water Level Monitoring System Block Diagram

PROXIMITY SENSOR • The distance sensor used is Devantech SRF 08 is an Ultrasonic • The range of sensor is 3 cm to 6 meters. • Frequency at the sound voiding area from 40 KHz to 400 KHz (Budiharto, 2009). • The ultrasonic sensor is a transducer type sensor used to convert mechanical, magnetic, heat, light and chemical quantities into voltage and electric current. • Ultrasonic sensors function as input elements. This sensor will emit signals to the barrier surface and the surface will reflect the signal. The receiver sensor receives signals from the reflection and converts them into digital data by using Analog Digital Converter.

MICROCONTROLLER • A microcontroller is a compact integrated circuit designed to govern a specific operation in an embedded system. A typical microcontroller includes a processor, memory and input/output (I/O) peripherals on a single chip. • ATMega AVR 32 is one of microcontroller from ATMega family with big enough user population. • It has 32 k. B flash memory and 32 ouptu input lines, and comes with an 8 channel ADC with 10 -bit resolution and 4 channels. This microcontroller is a low power CMOS microcontroller based on AVR RISC architecture Pin Configuration ATMega 32 Block Diagram AVR ATMega 32

GSM MODEM • A modem (modulator-demodulator) is a network hardware device that modulates one or more carrier wave signals to encode digital information for transmission and demodulates signals to decode the transmitted information. • A GSM modem is a specialized type of modem which accepts a SIM card, and operates over a subscription to a mobile operator. When a GSM modem is connected to a microcontroler, this allows be used for sending and receiving SMS. • The modem used in this research is Wavecom GSM as in figure 5, using RS 232 serial communication

SHORT MESSAGE SERVICE (SMS) • Short Message Service (SMS) is a text messaging service component of most telephone, World Wide Web, and mobile telephony systems. It uses standardized communication protocols to enable mobile phone devices to exchange short text messages. • The amount of data that is accommodated by sms is very limited around 140 octets or about 1120 bits. In practice 1 SMS contains only 160 characters.

IMPLEMENTATION • To program the microcontroller, we must prepare equipment and software that can be used to give instructions to the microcontroller. In this study microcontroller is put on programming board that is arduino compatible. This board supports Serial or USB communication with computer. • The software is NS One, open source arduino software, the compilation of this program will be made in hex file. • the program is ready to upload to NS. One board so that the written program (hex file) can be inserted into the microcontroller.

CONCLUSION • Results of this research on water level monitoring system, can be summarized as follows: • The System may provide SMS to the person responsible for water maintenance by using the cellular network available in the water reservoir area. • From the results of experiments conducted that ultrasonic sensors that are used in microcontroller ATMega AVR 32 is able to detect the movement of water surface at a distance of 3 cm to 5 meters. So this information can be sent via SMS using GSM modem.

END OF PRESENTATION Thank you