I hope someone can help me. I have a LoRaWAN gateway registered correctly on TTN and an RPi4 and the LoRaWAN SX1262 shield:
https://www.waveshare.com/sx1262-lorawan-hat.htm
Unfortunately I can’t figure out how to transmit data via LoRaWAN using this HAT and i havent find any example to help me out.

I tried to read the device EUI via SPI so that I could register it in the TTN, but I haven’t found anything that could help me, and I’m probably making some mistakes in the code that prevent me from reading anything.
Is there a way to retrieve the EUI? And more importantly, are there any examples for this HAT for LoRaWAN connectivity? How can I register the device?