send AT commands to esp8266 via Arduino

#include <SoftwareSerial.h>
 SoftwareSerial esp8266(2,3); // make RX Arduino line is pin 2, make TX Arduino line is pin 3.
                // This means that you need to connect the TX line from the esp to the Arduino's pin 2
                // and the RX line from the esp to the Arduino's pin 3
 void setup()
 {
  Serial.begin(9600);
  esp8266.begin(9600); // your esp's baud rate might be different
 }
 void loop()
 {
  if(esp8266.available()) // check if the esp is sending a message   
  {
   while(esp8266.available())
   {
    // The esp has data so display its output to the serial window   
    char c = esp8266.read(); // read the next character.
    Serial.write(c);
   }   
  }
  if(Serial.available())
  {
   // the following delay is required because otherwise the arduino will read the first letter of the command but not the rest
   // In other words without the delay if you use AT+RST, for example, the Arduino will read the letter A send it, then read the rest and send it
   // but we want to send everything at the same time.
   delay(1000);   
   String command="";
   while(Serial.available()) // read the command character by character
   {
     // read one character
    command+=(char)Serial.read();
   }
   esp8266.println(command); // send the read character to the esp8266
  }
 }