1. 1 ECE 191 Group 4 Autonomous Wi-Fi Sniffer RC Truck GIZMO Sponsor CAL-IT 2 Mentors Javier Rodriguez Molina Don Kimball Group Members Dan Curcio Anson Hsu

2. 2 Agenda Current progress (Gantt chart) Completed Tasks – Week 8 Technical Content Wireless network scanning resolution Overcome GPS driver problems Demo GPS program operation Goals for next week

3. 3 Gantt Chart

4. 4 Tasks Completed Met with Brian Braunstein for assistance in GPS driver troubleshooting (Both) Research 802.11b technical specifications (Anson) Started on web interface (Both) – PHP tutorial – Matlab testbed Implemented larger CF card for data storage (Dan) GPS and Kismet loaded on Soekris (Both)

5. 5 IEEE 802.11 sampling frequency 802.11 b/g run on 2.4GHz Nyquists Theorem – sample at twice the frequency (4.8Ghz) Wavelength (sampled) = 6.25cm! Image courtesy of plato.asu.edu

6. 6 Tradeoff: Full signal acquisition vs. Acquisition time An full survey of a 20m by 20m area at 1 sample/second would take ~4 months. Possible solution: Interpolation – Take samples at a more realistic interval – Access pts – typical range of 45m indoors – Assume the signal doesnt change drastically between samples

7. 7 CF Card Storage Constraints The Soekris board was using a 512MB CF card for OS and data storage With only ~30MB free, a working implementation would require ample space for log files Migration to a 1GB CF card will allow much needed space for storing data

8. 8 Goals for Next Week Configure Kismet Combine data log files Complete web interface Perform field testing Prepare for final presentation/paper