Visible Light CommunicationSecure Optical Wireless Technology
R-LiFi enables secure, high-speed, line-of-sight optical communication immune to RF interference and eavesdropping — ideal for defense, healthcare, aviation, and RF-restricted industrial zones.
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Key Features & Technological Advantages
RF-Free & EMI-Immune Communication
Transmits data using modulated light beams, completely eliminating electromagnetic radiation and radio frequency interference in hospitals, aircraft cockpits, petrochemical plants, and nuclear facilities.
Ultra-Secure Line-of-Sight Wireless Security
Light signals are strictly contained within solid walls and enclosures, providing inherent physical security against eavesdropping, signal interception, and unauthorized remote access.
Full-Duplex Ethernet, Serial & Audio Streaming
Supports 10/100 Mbps TCP/IP Ethernet networking, RS232/RS485 UART serial pass-through, high-fidelity analog audio streaming, and sensor data telemetry.
Li-Phone
Li-Phone invention is a commitment to the civic society from the technology leaders – RDL Technologies. To develop a technology which is very much concerned about public health, especially the next gen, is the strong underlining motto of the research team at RDL technologies. Li-phone breathes new life in to the communication world to develop “Internet Toxic free” world, where people can live stress free lives.
VL GLASS
VL Glass that helps visually impaired people navigate their surroundings and do more with greater freedom, independence and confidence. This versatile personal mobility assistant can helping to give all of humankind the freedom to move and continue to make people's lives easier. VL Glass enabled with R-LiFi technology to get navigation information though visible light in indoor environment and it guides visually impaired person through speech and vibration technique.
R-LiFi System Architecture & Transmission Topology
Seamless Data Modulation Across LED Transmitters, Photodiode Receivers & Ethernet Interfaces
Data modulation converts digital IP packets, serial signals, or analog audio into high-frequency light pulses transmitted via LEDs and captured by high-sensitivity photodiode receiver arrays.
Operational Benefits
R-LiFi optical wireless communication delivers unmatched physical security and electromagnetic immunity across critical infrastructure.
- 100% RF-Free & Immune to Electromagnetic Noise (EMI).
- Physical Security: Light beams cannot penetrate walls, eliminating remote hacking.
- Safe for Medical Operation Rooms & Aircraft Cabins.
- Subsea & Underwater Communication Capability (Blue/Green Light).
- Simultaneous High-Speed Data & Indoor Illuminative Lighting.
- Zero License Cost: Operates on unlicensed optical spectrum (400 THz to 800 THz).
- High-Speed Full-Duplex Data, UART, & Audio Transmission.
R-LiFi Transceiver Models & Modules
R-LiFi USB & Serial Transceiver (Li-Nano)
- Compact USB & UART Desktop Transceiver Module
- Optical Range: 0 to 3 Meters
- Wavelength: 850nm Infrared / Visible White
- Data Rate: Up to 115.2 Kbps / Multi-Megabit
R-LiFi Industrial Ceiling Access Point
- High-Power Optical Ceiling Access Point
- Coverage Range: 0 to 10 Meters
- Ethernet TCP/IP 10/100 Mbps Connectivity
- Immune to Industrial Motor & VFD Electrical Noise
R-LiFi Underwater Optical Modem
- Submersible IP68 Waterproof Housing
- Underwater Range: 0 to 8 Meters
- Optical Wavelength: 450nm Blue / Green Light
- ROV & Underwater Robotics Data Link
VL Glass & Li-Phone Audio Unit
- Handheld Optical Audio & Voice Communicator
- Transmission Range: 0 to 5 Meters
- High-Fidelity Analog Audio Pass-Through
- Integrated Battery & Optical Receiver Array
Order Information & Model Comparison
OEM, white-label, and custom optical development options tailored to your wavelength and baud rate needs.
OEM & Custom Optical Hardware
Custom LED driver circuits, specialized photodiode receiver arrays, optical lenses, and enclosure designs tailored for defense and industrial OEMs.
Custom Solution Engineering
Rapid custom R&D for underwater ROV optical modems, aircraft cabin LiFi access points, and medical equipment optical data links.
Protocol & Software SDK Support
Developer SDKs in C/C++, Python, Java, and .NET with Modbus RTU/TCP and MQTT integration support.
ORDER TABLE
| Model Part # | Optical Range | Hardware Type | Supported Interface | Data Speed / Baud Rate | Optical Wavelength | Action |
|---|---|---|---|---|---|---|
| RLiFi-101A | 0 - 2 Mtr | Desktop / Li-Nano | USB 2.0 / UART Serial | 115.2 Kbps | 850nm / Visible White | |
| RLiFi-101B | 0 - 5 Mtr | Ceiling Access Point | Ethernet (TCP/IP) | 10 / 100 Mbps | Visible White Light | |
| RLiFi-102A | 0 - 5 Mtr | Industrial Transceiver | RS485 / Modbus RTU | 115.2 Kbps | 850nm Infrared | |
| RLiFi-103A | 0 - 8 Mtr (Underwater) | Subsea IP68 Modem | Ethernet / RS485 | 10 Mbps | 450nm Blue/Green Light |
* For Customization of Optical Wavelengths, Baud Rates & Subsea Enclosures Please Contact Sales Team
Deploy across defense, healthcare, and RF-restricted environments
Ready to Deploy R-LiFi Technology?
Integrate secure optical wireless communication into your RF-restricted industrial facilities today.