Some problem with use TCP Client because this server response 3 Time

Troubleshooting
1

Some problem with use TCP Client because this server response 3 time

i develop api tcp socket on server with node.js this test complete with terminal

for develop on spark core simple code:

void Submit()
{
  Serial.println("");
  Serial.println("Connecting...");
  client.connect(server, 9000);
  if (client.connected())
  {
    Serial.println("Connected to server.");
    client.println("Hello, server!");
    unsigned int waitCount = 0;
    unsigned long lastTime = millis();
    // Wait until the server either disconnects, gives us a response, or the timeout is exceeded
    Serial.print("Waiting a for response.");
    while (client.connected() && !client.available() && millis() - lastTime <
      TIMEOUT_INITIAL_RESPONSE)
    {
      // Visual wait indicator for debugging
      if (waitCount++ % 100 == 0)
      {
        Serial.print(".");
      }
      // While we are waiting, which could be a while, allow cloud stuff to happen as needed
      SPARK_WLAN_Loop();
    }
    // Show a wait summary for debugging
    Serial.println("(wait loops: " + String(waitCount, DEC) + ")");
    // We stopped waiting because we actually got something
    if (client.connected() && client.available())
    {
      waitCount = 0;
      int charCount = 0;
      int lastReadTime = millis();
      // Keep going until the server either disconnects, or stops feeding us data in a timely manner
      Serial.print("Reading response.");
      while (client.connected() && millis() - lastReadTime <
        TIMEOUT_RESPONSE_READ)
      {
        // Visual wait indicator for debugging
        if (waitCount++ % 100 == 0)
        {
          Serial.print(".");
        }
        // We get something!
        while (client.available())
        {
          char c = client.read();
          ++charCount;
          // Visual data received indicator for debugging
          Serial.print("!");
          Serial.print(c);
          // Make note of when this happened
          lastReadTime = millis();
        }
      }
      // Show a wait/read summary for debugging
      Serial.println("(wait loops: " + String(waitCount, DEC) +
        ", chars read: " + String(charCount, DEC) + ")");
    }
    else
    {
      Serial.println("No/empty response");
    }
    // Just to be nice, let's make sure we finish clean
    Serial.println("Explicit flush");
    client.flush();
    Serial.println("Explicit stop");
    client.stop();
  }
  else
  {
    Serial.println("Connection failed.");
  }
  delay(RECONNECT_DELAY);
}

This result from serial monitor

Connecting...
Connected to server.
Waiting a for response..(wait loops: 53)
Reading response..!E!c!h!o! !s!e!r!v!e!r!!
!S!y!n!t!a!x! !E!r!r!o!r!!!!!!!!!
!S!y!n!t!a!x! !E!r!r!o!r!!!!!!!!!
!S!y!n!t!a!x! !E!r!r!o!r!!!!!!!!!
..........(wait loops: 1005, chars read: 64)
Explicit flush
Explicit stop
Connect

why response 3 time on ( !S!y!n!t!a!x! !E!r!r!o!r!!! )

How to fix it !!!

Thx ^ ^

2

This Server code !!!

socket.write(‘Syntax Error!!!\n’);

3

console Log form server

Hello, server!
He <<< you look why client sent data 2 state

4

Are you actually using single quotes (')) - you need double ones (").