Temperature Data Transfer Using Visible Light Communication

At present wireless communication is subjugated by radio frequency (RF) communication system. RF communication has drawbacks like limited bandwidth, radiation hazards, health concern, exposure to interception and interference and many more. Thus visible light communication (VLC) acts as an added supplement to RF communication by overcoming the above drawbacks. VLC provides both illumination and communication at the same time by using white LED at the transmitter. This chapter presents the measurement of temperature using LM35 temperature sensor and displays the same to the receiver using VLC. We tested the proposed prototype in indoor environment for different temperature monitoring applications like room temperature monitoring and core body temperature measurements of patient in hospitals and transmission of same to the receiver. The benefits of the proposed system are low cost, hazardless, accuracy, high range of temperature sensing, low power, high performance and communication distance of 0.60 m is achieved.