//In order to connect,

SoftwareSerial esp8266(2,3);

// the TX pin of esp8266 is connected to pin 3 of
// arduino uno and RX pin is connected to 2
// we need to pass baud rate to begin function

void setup()
{
  Serial.begin(115200);
  esp8266.begin(???); // what should i do in order to make it work?
}