Hi, my Sketch is working on the Mega 2560 R3 but not on an older one. I don't know if its an R1 or R2 cause there is no print on the PCB. I also switched the ethernet shield to make sure its not the shield. The MQTT Server does not receive the "hello world" from the older Mega 2560. #include <S…

Sketch working on Mega 2560 R3 but not on R1/2

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