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Unread 09-04-2014, 11:45
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Terminator
AKA: James Killian
FRC #3481 (Bronc Botz)
Team Role: Engineer
 
Join Date: May 2011
Rookie Year: 2010
Location: San Antonio, Texas
Posts: 298
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Re: Team 254 Presents: CheesyVision

Quote:
Originally Posted by billbo911 View Post
It uses FAR LESS BW than a camera on the robot sending video TO the DS.
It only sends 1 byte every 25ms. The flow if FROM the DS to the cRio.

If the processing was done on the cRio, then the FTA would have a point, but it is not. All processing is done on the DS and only one byte is sent. How the cRio uses that byte is up to the team.
The idea of sending one byte every 25ms by itself cannot be assumed to be low bandwidth unless it is sent with favorable options in the socket setup.

I was surprised to find how much bandwidth can acrue using UDP and the DO_NOT_WAIT option with a similar test of sending two doubles every 33ms. In short I took out the DO_NOT_WAIT and the bandwidth went down significantly.