I am new in TCP and in W5100S. Just started to use this chip on W5100S EVB V1.0 board. I initialized all ports, ip etc. And now when I start communications, I can see only ACKs from server. First ACK to my connection request with Syn set. Then I try to send message from client to server and I have ACK from server, but I do not see messages from client at all on wireshark.
Anyone had similar issues ?