nodemcu tcp sample

NodeMCUTCP.ino

#include <ESP8266WiFi.h>
#define SERVER_PORT 1907
const char* ssid = "haydut";//kablosuz ağ adı
const char* password = "wifi_sifre";
WiFiServer server(SERVER_PORT);
void setup()
{
  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(LED_BUILTIN, LOW);
  delay(500);
  digitalWrite(LED_BUILTIN, HIGH);
  Serial.begin(115200);
  Serial.println("");
  Serial.println("");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED)
  { delay(500);
    Serial.print(".");
  }
  Serial.println("WiFi Baglandi");
  Serial.println("IP: ");
  Serial.println(WiFi.localIP());
  server.begin();
  Serial.println("Server Basladi");
}
void loop()
{ WiFiClient client = server.available();
  if (client)
  {
    Serial.print("Yeni Client");
    Serial.println(client);
    while (1)
    { while (client.available())
      { uint8_t data = client.read();
        Serial.print(char(data));
        if (char(data) == 'H') {
          Serial.println(" Acik");
          client.write("Acik");
          //Nedendir bilmem ters
          digitalWrite(LED_BUILTIN, LOW);
        }
        if (char(data) == 'L') {
          Serial.println(" Kapali");
          client.write("Kapali");
          digitalWrite(LED_BUILTIN, HIGH);
        }
      }
      if (server.hasClient())
      { return;
      }
    }
  }
}