Quote:
Originally Posted by yash101
Well, if he is just transmitting raw textual data, he should be fine. If the is sending images or horrendous arrays of image data, big problems will arise.
Also, how do you guys get unlimited speed on the robot? Doesn't the data go through the FMS switches anyways, so is limited to 7mbps?
I think what might be one problem is the Tx power is a bit low. On my DD-WRT router, I can set the power and at full power, I get up to a quarter mile range.
I think the only way to reduce your bandwidth is to have the processing done onboard and only allow the basic FMS communications to run on the network.
If I write an image processing script onboard with the ability to transmit back images, I'd probably write a bwm-ng script so I can monitor the bandwidth and pin the GUI to a specific frequency to keep a constant data rate, e.g. 1mbps.
Another approach would be to just skip everything autonomous and make to robot fully autonomous.
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Latency and bandwidth are different. The FMS limits you to 7 mb/s, and you can transmit at a rate of 7 mb in one second, but there is a significant delay between when you send a packet and when it arrives. If you're running at 1 mb/s with the FMS, you'll get much less of a delay. At home, you can run at 7 mb/s and get a much smaller delay than the FMS. It's a separate issue than bandwidth.
You're saying that the transmit power is too low. I don't really think that's the case at all. I have connected to the field before my robot was anywhere close to the field. Also, the cisco router they use isn't lacking in transmitting strength. I'd be willing to bet, that even after messing with your router's firmware to get more signal strength, that the directional antennas on the cisco router have considerably more power than yours.