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Long-term exposure to radio frequency waves can have adverse effects on human health. It may cause bad effects especially to elderly people, children, and patients with weak immune systems. On the other hand, visible light communication technologies that use a light-emitting diode (LED) light source and a photodetector to transmit and receive data through visible light have a severe demerit that the...
This letter presents a long-range visible light communication temperature monitoring system using a CMOS image sensor of mobile device camera as a photodetector. A low complexity transmitter with a single color light-emitting diode (LED) is designed to transmit temperature data of a location, while a mobile device used as receiver. Temperature data are modulated by ON–OFF keying modulation and non-return...
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