esp8266 nodeMCU

				
					#include <ESP8266WiFi.h>
#include <Servo.h>  // Include servo library

Servo myservo; // Create servo object

#define relayPin 16            // servo connected to GPIO2 of ESP8266
const char *ssid     = "1405";// User WiFi, modify WiFi SSID when using
const char *password = "YX14051405";// WiFi Password you want to connect
const char *host = "192.168.1.214";// Modify IP address of your Server
WiFiClient client;
const int tcpPort = 8266;// Modify port number of your Server
 
void setup()
{
    Serial.begin(9600);    
    pinMode(relayPin,OUTPUT);
    delay(10);
    Serial.println();
    Serial.println();
    Serial.print("Connecting to ");// Write some prompts
    Serial.println(ssid);
    WiFi.begin(ssid, password);
    myservo.attach(15);
    while (WiFi.status() != WL_CONNECTED)// WiFi.status() is the WiFi connection status, returns the connection status                                       
    {
        delay(500);
        Serial.print(".");
    }// Send ..... to serial port if not connected
 
    Serial.println("");
    Serial.println("WiFi connected");
    Serial.println("IP address: ");
    Serial.println(WiFi.localIP());  // WiFi.localIP() returns the IP address obtained by 8266
}
 
 
void loop()
{
    while(!client.connected())   // Several exception handling for disconnection
    {
      if (!client.connect(host, tcpPort))
        {
          Serial.println("connection....");
          //client.stop();
          delay(500);
       }
    }
    while(client.available())
    {
      char buff[99];
      size_t counti = client.available();
      client.readBytes(buff,counti);
      if(buff[0]=='O')
        if(buff[1]=='p')
          if(buff[2]=='e')
            if(buff[3]=='n')
        {
           digitalWrite(relayPin, LOW);
           Serial.println("open");
           myservo.write(0);
           client.println("The LED is open!");
           delay(10);
        }
       if(buff[0]=='C')
        if(buff[1]=='l')
          if(buff[2]=='o')
            if(buff[3]=='s')
              if(buff[4]=='e')
        {
            digitalWrite(relayPin, HIGH);
            Serial.println("close");
            myservo.write(180);
            client.println("The LED is close!");
            delay(10);
        }
         if(buff[0]=='R')
          if(buff[1]=='o')
            if(buff[2]=='t')
              if(buff[3]=='a')
                if(buff[4]=='t')
                  if(buff[5]=='e')
        {
          while(1){
            for(int i=180;i>0;i-=5){
            digitalWrite(relayPin, LOW);
            myservo.write(i);
            }
            client.println("rotate!");
          for(int i=0;i<180;i+=5){
            digitalWrite(relayPin, HIGH);
            Serial.println("rotate");
            myservo.write(i);
          }client.println("rotate!");
          if(client.available())
                    break;
         }
       }
    }
    while(Serial.available())
    {
        size_t counti = Serial.available();
        String data;
        data=Serial.readStringUntil('\n');
        client.println(data);
    }
}