Ethernet Library For Simple Server

Projects Programming
1

Can someone give me some guidence as to how to set up a simple text based Ethernet server that will respond to to character commands, much like simple RS-232.

I've looked at all of the ethernet samples with Arduino 1.0 software and was able to easily get the Chat Server up and running with Windows Command Prompt Ping command, so I know the hardwware is working. I'm having difficulty getting a response when I try to communicate with a Windows Application that I wrote.

This is my Visual C++ socket client connection code, which works with 3rd part hardware I use. I generally don't have to designate a gateway:

int SocketClass::Init(String^ hostAddress, int portNumber, int timeOut)
{

	DWORD startTicks = GetTickCount();
	DWORD currentTicks;
	DWORD elapsedTicks;
	int bytesSent,rcv;
	

	if(m_socket!=nullptr)
		delete m_socket;

	if(m_endPoint!=nullptr)
		delete m_endPoint;

	m_endPoint = gcnew IPEndPoint(IPAddress::Parse(hostAddress), portNumber);
	m_socket = gcnew Socket(AddressFamily::InterNetwork, SocketType::Stream, ProtocolType::Tcp);
	
	m_socket->SendTimeout = 1000;
	m_socket->ReceiveTimeout = 1000;
	m_socket->Blocking = false;
	m_connected = -1;

	try {
		m_socket->BeginConnect( m_endPoint, gcnew AsyncCallback(this, &SocketClass::ConnectCallback), m_socket );
		}
	catch (Exception^ e) {
		System::Windows::Forms::MessageBox::Show("BeginConnect Exception Thrown");
	}

	elapsedTicks = 0;
	currentTicks = GetTickCount();

	do{
		currentTicks = GetTickCount();
		elapsedTicks = currentTicks - startTicks;
		if(m_connected == 1)
		{
			return 0;
		}
		Sleep(1);
		}while (elapsedTicks<timeOut);

	m_connected = 0;
	//delete m_socket;
	return -1;
	
}

I don't need internet access, I'm just communicating with the host Windows application over a switch.

Any guidence as to how to set up a simple terminal-style server would be appreciated.

Hardware: Nano 3.0/328p and Wiznet WIZ811MJ

Thanks
Rennie

2

Is your WIZNET part by any chance an Arduino Ethernet shield? In any event the Arduino Ethernet Library Ethernet - Arduino Reference could be of use. The Wiznet chips do TCP/IP on the chip, so all you need to do from the Arduino sketch is tell it to accept connections and send and receive strings. This is pretty close to what you seem to be asking for.

You should find lots of discussion on these forums if you search for "ethernet shield" or "wiznet".