Integrated Light Sensing and Communication for LED Lighting

Abstract

Solid state lighting is nowadays widely diffused both in residential and office or industrial environment. Ambient light sensing to modulate lamp power is typical too, but sensors inside a lamp are a challenge, due to the high flux of these sources, which easily saturates nearby light detectors. Usually, separate sensing devices must be introduced in the system, thus increasing complexity and cost. In this work, a methodology will be presented, to allow integration of a light sensing device inside a lamp, using low cost circuitry to mitigate interactions between high power light-emitting diode (LED) sources and sensing photodiodes. Moreover, the same circuit allows visual light communication among sources.

Edge Computing: A Survey On the Hardware Requirements in the Internet of Things World

“…The steps executed in an embedded application can be roughly represented by fetching data from sensors, elaborate them via the MCU and finally transmit the results by adopting wireless communications, like Bluetooth [17], Mobile Networks, Wi-Fi [18], Zigbee [19], Z-Wave [20], LoRaWAN [21], custom transmission protocols (like IR-UWB [22]) and Light-based systems as [23,24]. Since this sequence of tasks is performed periodically, energy savings can be obtained by switching off key electronics components when not needed.…”