Conventional street lighting systems do not allow controlling the light intensity depending on the traffic of pedestrians or vehicles, only operate in two automatic modes (on/off) according to the availability of daylight and consume enormous amounts of electric energy. In this article, we describe the design, development and implementation of a new intelligent street lighting system that is based on LED technology, an energy-efficient embedded wireless control device (hardware) designed from scratch, and photovoltaic solar energy. The embedded device includes specialized firmware and an energy-efficient wireless communication protocol, that allows to form a network of infrared sensors to detect pedestrians and vehicles, so as to control and dim the LED luminaires. We implemented a pilot system in a back road of the campus of Universidad Privada Boliviana, in the city of Cochabamba, Bolivia, where energy consumption measurements confirm energy savings of 72.8% thanks to the developed intelligent control system.
The Zigbee low-power communication standard has established itself as one of the most important wireless standards, enabling thousands of industrial and environmental monitoring applications. At the same time, Bluetooth and newly also Bluetooth Low Energy has captured the gadget and smartphone markets and currently enables various health and personal applications. The border between these two markets becomes thinner and applications would profit significantly from interconnecting these two standards and sharing the information obtained.We will demonstrate our custom designed device BLupZi, which interconnects the worlds of Bluetooth Low Energy and Zigbee. It can be configured to stream all data from one of the networks to the other or to filter particular packet types or source IDs. We will present two examples with two different types of Zigbee sensor nodes and a smartphone.
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