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Home Monitoring with Wireless Sensor Networks. Jesse Phelps – Senior Developer , LashBack. Agenda. ZigBee XBee Basic Overview Adapter Kill A Watt Motion Detector (PIR) XBee frame description Other uses. Wireless Sensor Networks. ZigBee. Personal Area Network Built on IEEE 802.15.4
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Home Monitoring with Wireless Sensor Networks Jesse Phelps – Senior Developer, LashBack
Agenda • ZigBee • XBee • Basic Overview • Adapter • Kill A Watt • Motion Detector (PIR) • XBee frame description • Other uses
ZigBee • Personal Area Network • Built on IEEE 802.15.4 • Adds authentication & encryption
XBee Specs • Power output: 1mW • Indoor/Urban range: Up to 100ft (Pro 300ft) • Outdoor/LOS range: Up to 300ft (Pro 1mi) • RF data rate: 250kbps • Operating frequency: 2.4 GHz
Motion Detector • Passive Infrared (PIR) • Pryoelectric Device • Detects change in the infrared profile
Pyroelectric Devices • Voltage output with temperature changes • Temperature change modifies atom position • Changes polarization • Gives rise to voltage
Frame Description • 7E Start Delimiter • 00 0C Length Bytes • 83 API Identifier for 16bit DIO Data • 56 78 Source Address • 2E RSSI Value bytes • 00 Option byte • 02 Sample Quantity Byte
Frame Description continued • 00 18 Channel Indicator • 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 • 00 18 Sample Data (1 high, 0 low) • 36 Checksum
Other uses • Wireless temperature sensor • .NET Micro
Links • http://www.digi.com/ • http://www.ladyada.net/ • http://www.p3international.com/ • http://www.devicesolutions.net/
Questions? @jessephelps http://www.jessephelps.com/