Modbus RTU slave (RS485) for ESP32 on Arduino platform

I have tried to find some software so i can use ESP32 as a modbus RTU slave with RS485 on the Arduion platform.

I have tried several differnt liberies , but i have not have any sucsess.
So if you have some information im would be happy .

Which libraries? Have you contacted the author of those libraries to let them know in what way they’re not working?

There is a good Youtube Video - Search for RS485 Modbus ESP32 - cant remember the guys name right now - but he has a two part video that goes through the whole thing