1. EECS194: First Experiments with TelosB Motes Joshua Kwan, Larry Ly, Kevin Liu

2. What We Did Measure signal degradation over distance in various situations: Measure signal degradation over distance in various situations: On flat table surface (Indoors) On flat table surface (Indoors) Through concrete floor (indoors) Through concrete floor (indoors) On concrete floor (outdoor) On concrete floor (outdoor) See whether another mote could be used in between router/mote to increase signal range. See whether another mote could be used in between router/mote to increase signal range.

3. Test 1: Indoors / Table We moved remote fixed distance away from router on same horizontal plane, measuring signal strength at each distance. We moved remote fixed distance away from router on same horizontal plane, measuring signal strength at each distance.

4. Test 2: Outdoor We tried to see whether positioning the router & mote (horizontal or vertical) would affect signal strength. We tried to see whether positioning the router & mote (horizontal or vertical) would affect signal strength.

5. Test 3: Through Concrete We tested to see if ‘ping’ still worked through a thick concrete floor. We tested to see if ‘ping’ still worked through a thick concrete floor. Problem: Couldn’t tell straight-line distance from router. Problem: Couldn’t tell straight-line distance from router. 64 bytes from 10.97.116.174: icmp_seq=66 ttl=32 time=522 ms 64 bytes from 10.97.116.174: icmp_seq=67 ttl=32 time=56.0 ms 64 bytes from 10.97.116.174: icmp_seq=68 ttl=32 time=1287 ms 64 bytes from 10.97.116.174: icmp_seq=69 ttl=32 time=686 ms 64 bytes from 10.97.116.174: icmp_seq=70 ttl=32 time=50.5 ms 64 bytes from 10.97.116.174: icmp_seq=71 ttl=32 time=50.7 ms 64 bytes from 10.97.116.174: icmp_seq=72 ttl=32 time=101 ms 64 bytes from 10.97.116.174: icmp_seq=73 ttl=32 time=396 ms 64 bytes from 10.97.116.174: icmp_seq=74 ttl=32 time=57.7 ms 64 bytes from 10.97.116.174: icmp_seq=75 ttl=32 time=51.7 ms 64 bytes from 10.97.116.174: icmp_seq=76 ttl=32 time=50.3 ms 64 bytes from 10.97.116.174: icmp_seq=77 ttl=32 time=423 ms 64 bytes from 10.97.116.174: icmp_seq=78 ttl=32 time=2115 ms 64 bytes from 10.97.116.174: icmp_seq=80 ttl=32 time=41376 ms

6. Test 4: Mote Hopping Tried to position motes so that one was in range of the router and one was only in range of the other mote. Tried to position motes so that one was in range of the router and one was only in range of the other mote. Repeating the concrete test, it extended range by 17ft Repeating the concrete test, it extended range by 17ft Repeating the outdoor test, extended at least 15ft (we ran out of floorspace) Repeating the outdoor test, extended at least 15ft (we ran out of floorspace)