Data acquisition system using Atmega128L

Abstract

Data Acquisition system is developed to monitor the environmental temperature and control the microcontroller. System consists of remote terminal unit (RTU) and supervisory station (PC). Remote terminal unit connects to the physical equipment sensor PT-100, which comprises a signal conditioning circuit and a microcontroller. The signal conditional circuit transforms the physical temperature parameters to analog signals and manipulates these analog signals. Then, microcontroller will convert analog to digital signals and send them through RS232 cabling. The term “supervisory station”, also can be called as master station, refers to the application (GUI) responsible for communicating with the RTUs which are distributed to measure the temperature of different places. In this simple DATA ACQUISITION system, the supervisory station is only composed of a single PC. The thesis of DATA ACQUISITION system mainly concentrates on the electronic and software design for this remote terminal unit, as well as the software development for the GUI on master station.