LiFi based underwater communication

Light fidelity (LiFi) technology utilizes visible light communication, employing light as a medium to transmit data at speeds surpassing those of WiFi.LiFi data transmission involves multiple bit streams, with an IR detector on the receiver side decoding the message.Binary data is transmitted, where '0' signifies an LED in the 'OFF' state and '1' indicates the LED is 'ON'.Both transmitter and receiver sections incorporate Arduino, programmed via Arduino IDE.High-intensity LEDs are employed in the LiFi transmitter, while a photodiode module detects the light signal in the receiver section.The system transmits two types of data using light: audio signals and text signals.Therefore, various topologies are studied to comprehend the characteristics of a LiFi system. I. INTRODUCTIONLiFi technology utilizes LEDs for data transmission, derived from optical wireless communication using light from LEDs for high-speed communication.Visible light communication operates by rapidly turning LEDs on and off, imperceptible to the human eye, maintaining low intensity to ensure invisibility but sufficient for effective communication.Its security against hacking is attributed to the inability of light to penetrate walls, although this limits its range, making it advantageous in environments sensitive to electromagnetic interference.Unlike WiFi's use of radio waves, LiFi utilizes the visible light spectrum, offering almost limitless capacity as the spectrum is vastly larger.Signals are transmitted wirelessly to receivers, where detectors convert optical signals into messages.This method, known as Visible Light Communication (VLC), ensures secure transmission within physical spaces due to light's inability to pass through walls.