#include <Ethernet.h>

byte mac[] = {0xE8, 0x2A, 0xEA, 0x4B, 0x1F, 0xC3};
IPAddress ip(192, 168, 0, 177);
unsigned int port = 50001;

String stringIn;

EthernetServer server(port);

void setup() {
  Ethernet.begin(mac, ip);
  server.begin();
  Serial.begin(9600);
}

void loop() {
  // if an incoming client connects, there will be bytes available to read:
  EthernetClient client = server.available();

  if (client.connected()) {

    stringIn = "";
    while (client.available()) {
      char c = client.read();
      stringIn = stringIn + c;
    }

    if (stringIn == "Test")
    {
      client.print("Message received");
    }
    Serial.println (stringIn);
  }
}