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Unread 07-03-2011, 19:04
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AKA: Mr. D (Dick DiPasquale)
FRC #0241 (Pinkerton Robotics)
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Re: Possible FLR Hacking?

Quote:
Originally Posted by Mark McLeod View Post
You can ask the FTA to monitor that for you and tell you after a match what kind of latency they saw. Ask before the match starts though. It's a lot more convenient to watch it than dig it out after the match. If something unusual happens on the field it's much easier to correlate.

Average trip (ms) is probably most important. You want this value below 20ms.
If it's higher, then you should relocate your radio.
The Missed Packet metric is not terribly useful, because it gets high when the Driver Station is on a long time before the robot or vice versa. It's not missed packets after communication is established.
Mark,
Thanks very much for the reply. The issue is: if you are a team that already suspect your radio signal is a potential problem in some matches, then you already have already planned to move the DAP1522 to a more optimal location on your robot. Its really the teams that don't suspect that they might have a problem that need their attention brought to it: otherwise, they might assume their problems are sourced in other places.

It would be a nice enhancement to the FMS to get it to only report dropped packets that occurred during the timed autonomous and teleop periods. And that problems are available for all teams to peruse. Radio geeks can set out on a mission to rid all lost WiFi packets from FRC competitions:

Team 241 has gotten WiFi radio signal religion based on a maddening three days of debugging during a regional. I'll be instigating other teams to get their radios in more optimal positions.

Also interesting, the picture you show has two competitors with voltages under 10.25 volts.
Anything in that range should be flagged red and the data stored on an web or phone app. Then, both the Battery geeks and the Radio geeks can spread the word about their respective areas of expertise to teams that are clearly not understanding the trouble that they are tempting.

Last edited by boomergeek : 07-03-2011 at 19:12.
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