Just checking :-). Look at Adafruit LoRa Feather -> Gateway , i saw you posted your question also there. But my advice remains the same. I use OTAA, the mentioned library ( https://github.com/matthijskooijman/arduino-lmic ) , and the ‘out of the box’ example. Blinking a led on the digital port has solved many problems (interconnection, wrong pin numbers etc). The symptoms look so familiar, i solved it by checking the DIO connections (only DIO0 and 1 are needed).