olpc xo-1 b-test-4 radio range, extreme range
Two units were separated by 6.3km, at one end on the top of a
mountain, but they were not able to communicate with each other,
probably due to Fresnel Effect.
- XO-1 B4 labelled quozl-8 firmware Q2C26 build 612 aloft on 6m
extension ladder at Coomooroo house,
- XO-1 B4 labelled quozl-7 firmware Q2C26 build 612 taken to top of Mt
Naman on foot.
- Setup mesh network manually without NetworkManager between units and
verify as stable.
- Elevate quozl-8 to position on ladder above house and verify pings
- Migrate quozl-7 to position on Mt Naman with lid closed, open lid,
try pings, try scan.
- Mesh setup fine and was stable.
- Pings continued when quozl-8 was elevated.
- Pings could not be reproduced once quozl-7 was migrated to Mt
Naman, and "iwlist eth0 scan" gave no results.
Not an appropriate test range, due to fresnel effect and terrain
obstruction, or due to excessive 2.4GHz noise from nearby cities.
Also, since quozl-7 was transported with lid closed, it might not have
recovered properly from suspend or standby. Need more information on
the current recovery behaviour.
Took a few pictures with the Record activity.
- quozl-8 coordinates on ladder, WGS84 -31.369688, 148.883629,
- quozl-7 coordinates at Mt Naman, WGS 84 -31.37301, 148.95033,
Photographs by Tanya
(740kbyte, contributed, XO appears twice, background changed to ease
Photographs by XO B4
Facing north, Bluff Mountain on the left, Siding Spring Observatory
was visible on the horizon on the right between the two smaller
Facing west, towards quozl-8 on the ladder, 6.3km away.
Facing east, the peak there is Tonduran Spire, but has had other
Facing south, tester on left, Tanya and Rob were walkers discovered
during the test, Tooraweenah behind them, with the Dilly hills south