I have a LED panel controller that can daisy chain with an another led panel controllers using a RJ14 cable to adjust a PWM that dims the panel. This is what I see on the RJ14 pins. A periodic signal that looks like this:
Seems to go at 25 MHz or even higher.
Is this a standard protocol, or is it a proprietary thing that needs to be reverse engineered?
By the way, this is the outputted signal when the dimmer is at around 75%
Here you can see the controller with the dimmer on it outputs a PWM to two LED drivers. The ch1 connector is to receive data from a master controller and the ch2 connector is to send data to a slave one. I assume that the two channels on each connectors are outputting the same data to replicate the same PWM on both drivers.
I will try to get more and better logic analyzer screenshots!