Hi, I have used a TCP/IP ethernet connection PLC -> LORAWAN.
I have managed to send / receive a buffer between two plcs, not to far one to the other in the open field. Had some signal issues which I decided to put a timed relay to reboot lora on both sides.
PLC as a TCP server has to be in the same subnet with lora as a TCP client and when acces make sure you acces from PLC to acces the remote port of Lora.
Hope you manage to have connection but don't expect to much trafic. My case 100 bytes buffer and sometimes lost some of them.
After I have contacted Ebyte with the signal loose problems they come up with other firmware version.
E90-DTU(900SL22-ETH)_UserManual_EN_v1.4.pdf