For some reason, I'm nearly always using red wires, so I didn't notice until now but… Apparently, green wires don't output anything.

Radio is receiving a signal: https://steamcommunity.com/sharedfiles/filedetails/?id=1822985181
But doesn't output anything on green wire : https://steamcommunity.com/sharedfiles/filedetails/?id=1822985353

So I'm led to believe that I have been misusing your mod all this time. Do green and red wires have a specific function regarding radios?

Red and green wires behave the same way but radios preserve the split between red/green circuit network on a channel. To get output on a green wire you need to transmit something using a green wire. Is that the case for you?

One visual trap is that the I/O port, unlike power poles, doesn't show circuit network signal colours on its input signals when you mouse-over the entity. That's because it's a decider combinator in disguise and the vanilla DC entity doesn't do this either.

Oh woah. Because the background isn't colored, it never occurred to me that it would preserve the split. That just opened a whole new layer of depth.

Thanks for the explanation!