1. Applying Wireless / SI/O Architecture To NeSSI March 7, 2001 John Crawford VP, Business Development Crossbow Technology, Inc.

2. V T P A Sensor Manager (I/O Controller) Signal In/Out to AC Wired S/A; Wireless IOC

3. P A Sensor Manager (I/O Controller) V T SM Wireless S/A; Wireless IOC

4. Node Architecture 300’ or 30’ Range ARM7 uP A/D 16 bit Mux SENSOR/ACTUATOR Bluetooth Radio Chip Baseband Controller SRAM for Data SIO serial comm Flash RAM SIO +5.00 Supply Power 5V DC Temp Sensor AA B a t e r y DC-DC +3.5 & 5V Voltage Converter BATTERY PACK (OPTIONAL) Radio Module Optional Power Amp AA B a t e r y AA B a t e r y AA B a t e r y

5. CrossNet SoftSens Software Provide data to the user on whatever platform is desired (PC, laptop, PDA, web, etc.) Make data accessible to a variety of data acquisition and analysis packages (LabView, C++, Excel, Visual Basic, etc.) Manages all Bluetooth node operations (Inquiry, Connect, Piconet) Track nodes as they come into and out of radio range. Interrogate nodes for configuration and sensor information Transfer data. Configure operating modes and parameters. Establish common time stamp for all Nodes. Upload new Node and SIO code over radio. Allow SIOs to be user configured for TEDS.

6. SI/O Architecture NODE SENSOR/ACTUATOR SIO Programmable Signal Conditioning Output (0 - 5V) uP w/ flash memory TEDS Serial Communication SENSOR Sensor Excitation Sensor Output (low level) Terminal block for user to attach sensor Inexpensive cable, high level analog sensor signals

7. Single Channel Product Combine radio, processor, A/D,SIO, Transducer Electronic Data Sheet, software for small unit dedicated to single sensor Integrated single channel node/SIO Bluetooth Radio Chip Baseband Controller uP A/D Signal Cond. SENSOR OR ACTUATOR

8. P A Sensor Manager (I/O Controller) V T SM Wireless S/A; Wireless IOC

9. V T P A Sensor Manager (I/O Controller) Signal In/Out to AC Wired S/A; Wireless IOC

10. Summary Wireless approach seems feasible Two basic implementation options Most flexible is complete “wireless smart-sensor add- on” for each sensor and actuator and optional wireless I/O controller Need to review economics Good first step: »SI/O on each sensor / actuator, wired to wireless I/O controller