Wled dmx out and wireless dmx board

Hello,
I used wireless dmx board since many years directly between dmx fixture and it works great. Now, I want to use wled to control led strip and my fixture with dmx out.
I have tested my wled dmx-out directly connected to my staitville xBrick, it’s ok. But when I want to use my wireless dmx board, it’s like there’s no detection. Di you think I have to put a ttl adapter on each transmitter and receiver ? It seems weird
I’m e newbie in electronic so I don’t understand.
If someone could explain me, thanks

When I use espixelstick or artnetnode on my esp8266 d1 wemos mini, I use the ttl max485 too and my wireless dmx card detect the signal… I relly don’t understand…
Nobody could help me ?
Thanks