In R51, the focus seems to be on WiFi/BT. I’ve always assumed this was for the purpose of positive control by the FMS and to avoid interference. Same for R84. Otherwise, all “signals” would be prohibited, including simple hand signals to a robot-mounted camera. Even an automated targeting system not specifically designed to work with a games vision targets could be construed as illegal under the strictest interpretation.
The human player is technically allowed to have his own set of controls as long as they’re wired. For example, the human player can have a set of joysticks in the human player zone set up and drive the robot to the chute. Two exceptions though, as stated above it has to be wired and you can only do this if you’re on alliance station 1 or 3 because controls can only move 1/2 alliance section away. Check the q and a on this last part it was a fairly recent question. As for other flashlights remote IR transmitters would this fall under special equipment rules?
It could. However, note that under T21B, non-powered signalling devices are perfectly legal. Items 1-3 in the above list are perfectly fine under T21B. But by the same token, that means that powered signalling devices are not legal.
So, let’s break this down slightly differently (because somebody is being picky about their interpretations…).
Signals using the part of the electromagnetic spectrum that is used by wireless communications are specifically banned unless specifically allowed (the FMS signal, basically). Signals using the infrared or ultraviolet parts of the same spectrum run into issues with powered signalling devices.
But signals using the visible part of the electromagnetic spectrum are just fine.