# Streetlight Control System Based on Wireless Communication over DALI Protocol
## 6 Conclusions  
We presented a lighting control system based on wireless communication with a DALI interface. The system uses a wireless communication based on standard IEEE 802.15.4 over which a new network layer adapted to a linear topology has been created.  
We described the architecture of the system, which is based on a three-level hierarchical model, and developed a SCADA application that allows the lamps' operation curves to be controlled individually. This application also detects possible failures in the lamps, which are immediately communicated using cloud architecture thanks to a developed mobile application.  
We developed a new low-cost wireless node with a DALI interface. This node is powered from mains (230 VAC), which makes it easily installable beside the lamp. The node can drive any DALI ballast or driver; it works with any kind of lamp, from high-pressure sodium lamps to LED lamps. In addition, due to the use of WSNs, the number of ballasts that can be managed with just one DALI controller has been increased.  
The implemented tests and a brief description of the pilot installations have been presented. We have also presented and discussed experimental results that provide evidence that the system performs correctly.  
The fully customizable time-dimming operation provides clear savings in terms of energy consumption, which means benefits in terms of environmental aspects (less CO\({}_{2}\) emissions) plus profit due to lower energy costs. In addition, the system optimizes the lamps' lifespan and provides a very valuable tool for maintaining street-lighting facilities because the bidirectional communication enables relevant information to be gathered about the status of the lamp and provides information about events, failures or malfunctions in the luminaries. Besides, it gives additional benefits being able to integrate lighting network with other Smart City solutions increasing safety and quality of life.  
This research has been partially supported by FEDER-Local Andalusian Gob. Research grants under Project Intelligent Technologies for Streetlighting Management (IT2 SIP), under contract No. I2013112 G-GI3002/IDIF. In addition, this work has been supported by the Spanish Ministry of Economy and Competitiveness under Project TEC2013-47316-C3-1-P.  
[PERSON] has been leading the research project and leading the communication issues as well as electronics and interfacing. [PERSON] has been working in the HW design, development and test. [PERSON] has been leading the software and application layer. SCADA, APP, server, database, external connections and programming and setting the embedded PC. [PERSON] has been leading the tasks concerning lighting technologies, facilities, power quality or photometric studies, among others. Also he has been in charge of the physical installation in the real test scenarios mounted. [PERSON] has been working in a deep analysis of the data gathered, modes of operation, ROI, economic case studies and collaborating with the rest of the team in the electronic design and prototyping stage. [PERSON] has been working in the HW design, firmware development and test. Also collaborates in communication.  
The authors declare no conflict of interest.