Simplex High-Speed Morse Coding with Ultra Low Power MSP430

Abstract

This paper presents the design and implementation of a simplex communication model using high-speed Morse coding. Morse code is a dot and dash code used from the 19th century and prevails for highly secure applications. The objective of this paper is to design effective encoder and decoder circuits for the Morse code which draw less power. The model is implemented by using two microcontrollers – MSP430 for encoding and ATMEGA8 for decoding. The communication between microcontrollers and the end users are established using Bluetooth. The Morse code is transmitted through an optical medium as flashes of light. The light is flashed using an LED and detected using a phototransistor that constitute an optocoupler. The actuator and sensor pair in the optocoupler are varied by using combination of other actuators like IR diode, Laser and sensors like Photodiode. Each of these combinations have been analysed under the presence and absence of external light with varying distances and the resulting characteristics are plotted. This model is very effective for communication in noisy environments and eliminates the necessity of skilled personnel for decoding the message. It enhances the security and reduces the time required for the overall process. The model has been tested with information of various lengths and it has proven successful in performing the desired operation and delivering the correct output in all the cases.