DESIGN AND DEVELOPMENT TELEMETRY SYSTEM USING SHORT MESSAGE SERVICE PROTOCOL ON GLOBAL SYSTEM FOR MOBILE COMMUNICATION

• Main Author: Permadi (NIM 102 03 055), Heri
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/6224
• Institution: Institut Teknologi Bandung

Abstract : <br /> <br /> <br /> <br /> <br /> A telemetry system has been designed and implemented. This telemetry system uses Short Message Service (SMS) on GSM network as data transmission medium. The measurement data encapsulated with SMS protocol by microcontroller in the measuring station. The decapsulation process between measurement data and SMS protocol is performed by control station that can be a mobile device. It needs some Java platform for mobile device, known as Java 2 Micro Edition (J2ME). Configuration and profile used in this final project isConnected Limited Device Configuration (CLDC) 1.1/1.0 and Mobile Information Device (MIDP) 2.0. The measuring station works using an AT89S52 microcontroller which has 8K Byte of In-System Reprogrammable Downloadable Flash Memory and 256 x 8-bit internal RAM. It has 8 channels input from sensor that directly connected to ADC. The sensor input has voltage interval from 0 to 3,3 volt. The ADC used in this research is ADS7822, a 12-bit sampling analog-todigital converter (A/D) with Serial Peripheral Interface (SPI) communication. The error of testing system is 1,55 % for temperature measurement.