Newbee - nothing seems to be received by ttn gateway

SX1276 V2 Lora ESP32 LX6 Dual-Core 0.96 Inch OLED Bluetooth LE Wifi Kit 32 Module CP2012 IOT 868-915MHz Antenna Development Board for Arduino

thanks for all the valuable hints. i feel, i can now continue by myself.

now it works - done.

thanks again, g.

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just for the sake of learning, what was the issue and how was it fixed ?

Regards
Andre

i had not obeyed the protocol. after fixing it now works.e2

(prototype of my first selfmade node - it does not look very professional but it works fine)