void setup() { 
 //Initialize serial and wait for port to open:
  #define AWAKE  4 //Despertar WIFI
  #define FACTORY 7  //factory RESET/AP RN131
  pinMode(AWAKE, OUTPUT);
  digitalWrite(AWAKE, HIGH); 
  pinMode(FACTORY, OUTPUT);
  digitalWrite(FACTORY, LOW); 
  Serial.begin(115200); 
  Serial1.begin(9600); 
  delay(5000);
  Serial1.print("$$$");
  delay(250);
  Serial1.println();
  Serial1.println();
} 

void loop() { 
  if (Serial.available()) 
  {
    int inByte = Serial.read();
    Serial1.write(inByte); 
  }
  if (Serial1.available()) {
    int inByte = Serial1.read();
    Serial.write(inByte); 
  }
}