ear36:
Hello,
I have been toiling for the last couple weeks to try to send ASCII message over tcp from an arduino uno ethernet to a motor controller. I have been using wireshark to listen to in and can't seem to get the arduino to connect and send anything over tcp.
It looks as if you have misunderstood the protocol for the controller and are trying to send your messages as an ASCII string instead of as binary messages. But that's a side issue, if you haven't even managed to get a TCP socket connected yet.
Are you seeing any activity over ethernet at all fro the Arduino, when your sketch tries to establish the connection?
Are you certain that your wireshark is running on an adapter which has visibility of the Arduino/motor controller traffic?