A prototype of the 1451.5 sensor using ZigBee technology
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Efficient design and implementation of wireless sensor networks has become a hot area of research in recent years, due to the vast potential of sensor networks to enable applications that connect the physical world to the virtual world. At the same time there is a need to develop a standard which can make all the sensors to work together without much of human involvement and customization. The same software should be able to work with sensors from different manufacturers. This is the reason the IEEE has defined a 1451.5 standard for smart sensors with a wireless interface. The 1451.5 standard provides a single generic wireless interface between a transducer and external network, independent of the network protocol in use. The physical layer of this standard can use bluetooth, Wi-Fi or ZigBee. In the current work prototype of 1451.5 standard, uses ZigBee as its underlying physical layer. ZigBee is a low cost, low power, open global standard for reliable, cost-effective, low power wireless applications based on the IEEE 802.15.4 standard. The goal of this project is to develop a prototype of 1451.5 based TIM and NCAP with the following specifications: (1) Built-in sensors (Temperature, Illumination, Relative Humidity); (2) Wireless (RF) with range of 10 Meters min; (3) Standard protocol & ID (IEEE 1451.5); (4) Self-organizing network (Zigbee); (5) Long battery life; (6) Full-feature graphics at final readout; (7) Small size. All of the specifications have been achieved with the Freescale Zigbee Demonstration kit. Required sensors have been connected to the prototype board, TEDS according to 1451.5 standard has been formed and the application is written in the C programming language. The TIM and NCAP prototypes have been tested and expected results have been obtained.