Thanks for all the infomations, I'll take a look as it seems exatly what I "need" . I knew that I could use http requests (an example here: https://github.com/limited660/Duet-ESP8266-LCD) but I would prefer a wired connections. Thanks again for the help!

I was wondering if it was possible to have connected at the same time a PanelDue to the 10 pin connector and an arduino/esp32 (keeping in mind the voltage of the Tx/Rx lines) to the 4 pin PanelDue connector. If it was possible i would use this to pull the Duet status (mine is a Duet 2 WiFi) with Gcode, to control some addressable leds. The only alternative I can think of is to use the microusb port at the front, but that wouldn't be as clean. By the way, I use the PanelDue with the 10 pin connector because I want to retain the sdcard slot (that I didn't tested )