Tiziano - 2019-09-22

Hello to all,
I am trying to carry out the project with the link below, the TCP part works for me but I have problems with the RTU part, someone can tell me if it is possible to carry out this project even with a converter via GPIO 14-15 and if it were not possible you can recommend me a usb receiver that you have already used.
Thank you

https://www.youtube.com/watch?v=J4YYkOrebIo m