Some questions on the legality of Wifi

[epylko]

Originally Posted by techhelpbb

When there were issues in the past with the interference the source that caused the most public examples were all interacting with the 5GHz spectrum. Airport radar can also interfere with the top few channels of that 5GHz spectrum.

Those (United States) channels are:

• 52 (5260 MHz)
• 56 (5280 MHz)
• 60 (5300 MHz)
• 64 (5320 MHz)
• 100 (5500 MHz)
• 104 (5520 MHz)
• 108 (5540 MHz)
• 112 (5560 MHz)
• 116 (5580 MHz)
• 120 (5600 MHz)
• 124 (5620 MHz)
• 128 (5640 MHz)
• 132 (5660 MHz)
• 136 (5680 MHz)
• 140 (5700 MHz)

Originally Posted by techhelpbb

Also this 802.11n supports channel bonding which is usually turned on but occasionally has been turned off in the past.
So that means that your robots can use 2 channels of that spectrum to get extra radio bandwidth.
That still does not remove the 7Mb limit imposed between your robot and the field.
That bandwidth restriction is imposed not at the radio level but at the protocol level.

It's something that is set by the access point. You can set your client to be able to use 40Mhz channels but if the AP doesn't have 40Mhz channels enabled, you won't get any benefit.

Finally, 80Mhz channels are possible with the 802.11ac Wave 2 access points which can give you an association speed of almost 3.5Gbps.

[jkoritzinsky]

You guys should take a look at SuperScouter. It allows data transfer over QR codes (and customizable data forms). Take a look at http://jkoritzinsky.github.io/SuperScouter4FRC