Design And Development of A Plug-In Type Wireless Data Logger for Energy Measurement

Increasing demand of electrical energy and its rising prices have enforced the need of managing usage of electrical energy more efficiently. This requires regular monitoring of electrical appliances to timely identify inefficient energy consumption due to faulty conditions, inefficient designs, user negligence, etc. In this paper, design and development of a low-cost wireless data logger is presented that aims to accurately measure the value of energy and related parameters like VRMS, IRMS and instantaneous power in real time for single phase applications. The proposed data logger acts as a plug-in device that can easily be introduced between mains and the appliance. The system can collect the data in real time and communicate it to a computer over a Bluetooth based wireless link. The computer hosts a simple graphical user interface (GUI) based application that allows user to log the data as and when required. The proposed data logger is designed using CS5460A single phase bi-directional power/energy IC from Cirrus logic interfaced with AVR ATmega32 microcontroller. A wireless link between is established using AUBTM-20 Bluetooth modules. Serial EEPROM is also included in the proposed design to store the data locally on the board for later use. GUI for the data logger has been designed using MATLAB.