"No Comms"

[ezygmont708]

Originally Posted by Dave Flowerday

Using STP is against the rules. See R57:



The control system this year uses 5GHz 802.11n exclusively, so you won't find any field communications in the 2.4 band. Additionally, Bluetooth interference should be a non-issue since it also uses the 2.4GHz band.

I was not aware of the rule regarding shielded ethernet cable. Thank You for the notice in advance.

As for the wireless communication, I know that I was seeing massive comms across the 2.4 Ghz network, and I guess it was possible that it was the arena's wireless, but coverage across all 11 channels in the 2.4 Ghz range is abnormal, as one would normally try to keep it seperated out to three non-overlapping channels (Normally 1/6/11). As with rule R57 bluetooth is not permitted on the robot, that is very smart on FIRST's Part.

Last year, while reviewing issues on a wireless system, we noticed an issue with bluetooth clients that were crowding the network, and therefore providing interference across the spectrum. Microwaves, and HVAC motors have been shown to pose similar problems.

I still highly recommend moving the adapter way from any large metal plates, and keeping them away from motors (within reason (5-8"))...