Comunicação por luz visível led a led comparando diferentes configurações no transmissor e no receptor

Abstract

In this work a study was carried out on visible light communication (VLC), which consists in the use of the same light that illuminates the environment, to transmit data using LEDs on the transmitter and also on the receiver. In addition to the use of LEDs as photodetectors, another innovation of this work was the fact of testing new configurations for the LEDs. Using a microcontroller to transmit and another to receive the data, tests were performed so that we could identify which of these configurations is the best. The criterion chosen for such indication was the bit error rate (BER) analysis during the communication. After several tests, the conclusion obtained was that in general the configuration that presented the best results was when 2 Leds were used in series in both transmitter and receiver. The tests were performed in the same environment, but in two different circumstances: first with the ambient illuminated and then with no light. The tests performed when the environment was dark presented better results for all tested configurations.