Thread: Einstein 2012
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Unread 29-04-2012, 17:32
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Re: Einstein 2012

I've asked this elsewhere but the D-Link is a dual band AP. If it's listening on 2.4GHz, even if the field is in the other band, 2.4GHz connection activity could interact with the radios.

Normally in a WiFi network a dual band radio would offer bridging of all the traffic on the switch with all the traffic authorized on both bands. The only way to stop that behavior is disable one band.

It could be that in a room with a very large number of 802.11G networks just the scanning past that other band could cause issues if the 2.4GHz radio portion is not disabled.

Also to the conversation directly above at MAR Mount Olive (I was in spare parts) one team having major communications problems was using Labview and CAN. We discussed the possibility of the issue being the CAN, but it didn't seem likely. Someone did use my oscilloscope to check their power, but in the pits not on the field. We also considered that Labview might not trap exceptions quite the way other languages do so. One should keep in mind that with so many language options it's entirely possible that Labview has one communications effecting issue and C++ has others. Some examples of communications issues effecting teams running C++ were noted elsewhere in the forums.

There are so many possible combinations of problems. Hard quantifiable evidence will be needed. Now the problem for FIRST will be that Championships are over and the effected robots might not be in the states they were at the time of the issues when and if they appear at other events. In point of fact, neither will the fields after they are taken down, moved and reassembled elsewhere.

Last edited by techhelpbb : 29-04-2012 at 17:41.
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