ตัวอย่าง Code ของ 8266 ESP-01
#include <SoftwareSerial.h>
   #define SSID "xxxxxxxx"
   #define PASS "xxxxxxxx"
   #define DST_IP "220.181.111.85" //baidu.com
   SoftwareSerial dbgSerial(10, 11); // RX, TX
   void setup()
   {
    // Open serial communications and wait for port to open:
    Serial.begin(57600);
    Serial.setTimeout(5000);
    dbgSerial.begin(9600); //can't be faster than 19200 for softserial
    dbgSerial.println("ESP8266 Demo");
    //test if the module is ready
    Serial.println("AT+RST");
    delay(1000);
    if(Serial.find("ready"))
    {
       dbgSerial.println("Module is ready");
    }
    else
    {
       dbgSerial.println("Module have no response.");
       while(1);
    }
    delay(1000);
    //connect to the wifi
    boolean connected=false;
    for(int i=0;i<5;i++)
    {
       if(connectWiFi())
       {
         connected = true;
         break;
       }
    }
    if (!connected){while(1);}
    delay(5000);
    //print the ip addr
    /*Serial.println("AT+CIFSR");
    dbgSerial.println("ip address:");
    while (Serial.available())
    dbgSerial.write(Serial.read());*/
    //set the single connection mode
    Serial.println("AT+CIPMUX=0");
   }
   void loop()
   {
    String cmd = "AT+CIPSTART=\"TCP\",\"";
    cmd += DST_IP;
    cmd += "\",80";
    Serial.println(cmd);
    dbgSerial.println(cmd);
    if(Serial.find("Error")) return;
    cmd = "GET / HTTP/1.0\r\n\r\n";
    Serial.print("AT+CIPSEND=");
    Serial.println(cmd.length());
    if(Serial.find(">"))
    {
       dbgSerial.print(">");
       }else
       {
         Serial.println("AT+CIPCLOSE");
         dbgSerial.println("connect timeout");
         delay(1000);
         return;
       }
       Serial.print(cmd);
       delay(2000);
       //Serial.find("+IPD");
       while (Serial.available())
       {
         char c = Serial.read();
         dbgSerial.write(c);
         if(c=='\r') dbgSerial.print('\n');
       }
       dbgSerial.println("====");
       delay(1000);
    }
    boolean connectWiFi()
    {
       Serial.println("AT+CWMODE=1");
       String cmd="AT+CWJAP=\"";
       cmd+=SSID;
       cmd+="\",\"";
       cmd+=PASS;
       cmd+="\"";
       dbgSerial.println(cmd);
       Serial.println(cmd);
       delay(2000);
       if(Serial.find("OK"))
       {
         dbgSerial.println("OK, Connected to WiFi.");
         return true;
         }else
         {
          dbgSerial.println("Can not connect to the WiFi.");
          return false;
         }
       }