TCP server and client between two photons

Troubleshooting
4 
SYSTEM_MODE(MANUAL);

TCPServer server = TCPServer(80);
//TCPClient client;

void setup()
{
    WiFi.connect();
  
  pinMode(D7,OUTPUT);

  // Make sure your Serial Terminal app is closed before powering your device
  Serial.begin(9600);
  // Now open your Serial Terminal, and hit any key to continue!
  //while(!Serial.available()) 
  //Particle.proceshttps://build.particle.io/build/562c90a9bbdd36b4af0023fc#flashs();

  Serial.println(WiFi.localIP());
  Serial.println(WiFi.subnetMask());
  Serial.println(WiFi.gatewayIP());
  Serial.println(WiFi.SSID());
  
  // start listening for clients
  server.begin();
  
}

void loop()
{
    // check for a new client to our server
    TCPClient client = server.available();
    if (client.connected())
    {
        // we got a new client
        // find where the client's remote address
        IPAddress clientIP = client.remoteIP();
        // print the address to Serial
        Serial.println(clientIP);
    }
    
    Particle.process();
    
    digitalWrite(D7,HIGH);
    
    Serial.println(WiFi.localIP());
    Serial.println(WiFi.subnetMask());
    Serial.println(WiFi.gatewayIP());
    Serial.println(WiFi.SSID());
    
    Serial.println(client.connected());
  if (client.connected()) {
    // echo all available bytes back to the client
    while (client.available()) {
        char c = client.read();
      server.write(c);
      Serial.print("message recieved:");
      Serial.println(c);
    }
  } else {
    // if no client is yet connected, check for a new connection
    client = server.available();
  }
  delay(1000);
  digitalWrite(D7,LOW);
  delay(1000);
}

@moors7: please check this out: