Arduino (should) communicate with S7-300 via Ethernet

Projects Networking, Protocols, and Devices
3

Thanks for your response!

PaulS:

IPAddress PLC(192, 168, 0, 1); // PLC Address

Are you positive? That looks more like the router address.

Yes, thats the IP of the CPU.

I deleted that by now, because I only want to transfer double words. It wasnt

PaulS:

byte Buffer[1024];

That's half of SRAM. Is that anywhere near a reasonable size?

I deleted that by now, because I only want to transfer double words and therefore don't need a separate buffer.

It is working now! I simply had to use the Ethernet2 library.