Controlling home appliances from outside - “I can be home when I’m not.”
Concerned about conserving energy? need to change the temperature of your air conditioner as you drive back home? Want to notify that you are on vacation and ask your lights turn on and off at specified time?
Now, you can do it through your mobile phones, PDAs or either home-based or office PC.
Its possible. .NETMicroframework and c# make it easy.
The Microsoft .NET Micro Framework
The Microsoft .NET Micro Framework combines the reliability and efficiency of managed code with the premier development tools of Microsoft Visual Studio to deliver exceptional productivity for developing embedded applications on small devices. The .NET Micro Framework is supported by a number of ARM7-and ARM9-based processors. Minimum of 256KB RAM and 512K Flash/ROM required for development and deployment,a memory management unit is not mandatory.
The Z-Wave Technology
Z-Wave, which was codified through an industry alliance in 2005, is a wireless radio frequency (RF)-based communications standard that makes remote control effective and practical for homes of any size. The protocol, which is embedded in a microprocessor chip and built into a module or device along with memory – flash memory, RAM, or both – transforms a stand-alone appliance into an intelligent networked device that can be controlled and monitored wirelessly. Z-Wave delivers high-quality networking at a fraction of the cost of other similar technologies by focusing on narrow bandwidth applications and negating the need for costly hardware by employing innovative software solutions like .NET microframework
A module with microcontroller and Z-wave ethernet gateway
Vizia RF Foyer is one such developed by Leviton manufacturing and its partners.
Vizia RF Foyer, the industry’s first Z-Wave-compliant Ethernet gateway. The Vizia RF Foyer connects to an Internet-linked PC or laptop through the computer’s Ethernet port and transmits signals to a Z-Wave home control network. Peer-to-peer mesh networks based on the .NET Micro Framework, the Vizia RF Foyer, and the Z-Wave protocol overcome the performance issues and high cost of earlier generations of wireless home control systems.
Each Vizia RF Foyer module is equipped with a two-way radio chip that it uses to communicate with modules, called nodes, in the network. Z-Wave command signals travel from node to node along the network to their final destination. If any form of interference blocks the signal along the way (for example, a wall or a large appliance such as a refrigerator), the signal is automatically rerouted through other nodes until it reaches its destination. The “self-healing” feature of the Z-Wave mesh network lends it unparalleled reliability.
An embedded application, such as the one in the Vizia RF Foyer, customarily takes approximately one year to develop. However, with the .NET Micro Framework, Leviton’s software partner ControlThink was able to produce a working proof of concept in three days and, porting its existing .Net code base, completed the final application within three months.