Atm11 home automation design using low pan wireless sensor networks
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MICROCONTROLLER LCD
Atm11 home automation design using low pan wireless sensor networks
- 1. Home automation design using low pan wireless sensor networks Abstract Wireless sensor and actuator networks (WS&ANs) are a new technology based on networks of small radio-enabled embedded devices that are being deployed in areas such as environmental monitoring, vehicle tracking, building management, body monitoring and other applications. Power sources for network nodes are often limited, which imposes restrictions on hardware resources and their use by the underlying embedded software. We propose a new wireless sensor network architecture that is especially designed for the task of home automation. Our system relies on a low power WS&AN that employs energy harvesting techniques to maximize node lifetime and an embedded residential gateway that offers user interaction and secure connectivity to the outside world. The advantages of our system are its scalability, low power, self sufficiency and versatility. INTRODUCTION Wireless Sensor Networks (WSNs) or more generally Wireless Sensor and Actuator Networks (WSANs) are employed in a wide range of data acquisition, data processing, and control applications. Their advantages over traditional wired sensor and actuator networks include node mobility, increased reliability (due to availability of adaptive multichip routing), easier installation and lower deployment cost. Home automation is the process in which the household environment is given additional functionalities through the integration of sensors and actuators into otherwise non automated systems like lighting, heating, air conditioning and even regular appliances with the purpose of providing improved convenience, security and energy efficiency. Almost all of the home automation systems that are currently available on the market
- 2. employ wired networks and a multitude of communication protocols like X-10, Universal Power line Bus (UPB), MODBUS, or even via a standard Ethernet connection. They all have been available for at least a couple of decades and, while technologically and functionally proven, they offer some disadvantages that hindered their widespread adoption. For example, MODBUS and Ethernet require cabling for both power and data lines that can be expensive and aesthetically displeasing. X-10 and UPB have the major advantage of utilizing the already existing power line and outlet infrastructure but suffer from low bandwidth and are susceptible to high error rates on low quality or noisy power lines. Wireless sensor networks seemed the logical step to address the issue, because of their ability to function using relatively small, inexpensive, low-power nodes that can form short range networks using protocols like Bluetooth, Zigbee, WirelessHART, or 6LoWPAN. However, not all of the above standards are equally well suited to a home automation scenario. For example, Bluetooth networks are usually limited to a small number of nodes and have higher energy consumption than its Zigbee counterparts. WirelessHART, although reliable and highly flexible, is more suited to Process field device networks that are used in industrial environments. The 6LoWPAN standard promises the fulfillment of the emerging trend of embedding Internet technology into all aspects of everyday life, mainly because of its low costs, low power, scalability, possibility to easily adapt existing technologies. In this paper we present a home automation infrastructure that is built around a zigbee wireless sensor network.
- 3. BLOCK DIAGRAM: 1 .APPLIANCE UNIT POWER APPLIANCES SUPPLY MICRO CONTROLLER LCD SENSORS ADC Zigbee 2. CONTROL UNIT Zigbee SYSTEM