#define CH_PD 7  
#define IO0 10 
#define IO2 9 
#define PROGRAM false

void setup()  
{
  pinMode(CH_PD, OUTPUT);
  pinMode(IO0, OUTPUT);
  pinMode(IO2, OUTPUT);
  #if PROGRAM==true
    digitalWrite(IO0, LOW);
    digitalWrite(IO2, HIGH);
    Serial.begin(57600);
    Serial1.begin(57600);
  #else
    digitalWrite(IO0, HIGH);
    digitalWrite(IO2, HIGH);
    Serial.begin(115200);
    Serial1.begin(9600);
  #endif
  digitalWrite(CH_PD, LOW);
  delay(1000);
  digitalWrite(CH_PD, HIGH);  
}

int i = 0;
int n = 1;
void loop() // run over and over
{ 
  if (Serial.available())
      Serial1.write(Serial.read());
  if (Serial1.available())
      Serial.write(Serial1.read());
}