LiCamIoT: An 8x8 LED Matrix Pattern to Camera Communication for LiFi-IoT Applications

Abstract

With the advent of the Internet of Things(IoT), a new frontier for developing applications under smart cities, smart transport, smart agriculture, and smart industries has garnered the attention of researchers and the consumer community. However, it also means adding more network-connected devices to the saturated Radio Frequency spectrum. Visible Light Communication based IoT systems can provide short-range indoor communication with minimal cost, thus aiding in offloading spectrum saturation. In this paper, an Optical Camera Communication-based IoT Application is proposed, implemented, and evaluated. The sensed values from the temperature and humidity sensor are mapped to an 8x8 LED matrix based on the proposed frame format. A camera-based receiver captures and decodes data from the frame using the proposed technique. The performance of the proposed system was evaluated based on SNR, distance, Packet Rate, and Packet Error Rate(PER). The PER of less than 3% was achieved for 2m distance and a Packet rate of 2 packets per second (pps).