Basic lora config

Hi! I’m trying to use two LoraE5 boards to comunicate between them using Lora (not LoraWan). STM has an example called Ping Pong in wich im basing my design, but i were not able to port it to the seeed E5. What’s the easiest way of doing this comunication? Ideally using just the config, send and receive functions.
Thank you very much for yor time