//====================
 #define RXD2 16
 #define TXD2 17
 #define RXD1 32
 #define TXD1 33
 
// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  Serial.begin(115200);
  Serial.setDebugOutput(true);
  Serial.println();

  //=========================
  Serial1.begin(9600, SERIAL_8N1, RXD2, TXD2);
  Serial2.begin(9600, SERIAL_8N1, RXD1, TXD1);
  
  Serial.println("Serial1 Txd is on pin: "+String(TXD1));
  Serial.println("Serial1 Rxd is on pin: "+String(RXD1));
  Serial.println("Serial2 Txd is on pin: "+String(TXD2));
  Serial.println("Serial2 Rxd is on pin: "+String(RXD2));
}

// the loop function runs over and over again forever
void loop() {                    // wait for a second
  if(Serial1.available()){
     //Serial.write("-");
     Serial.write(Serial1.read());  
   }
   if(Serial2.available()){
     //Serial.write(".");
     Serial.write(Serial2.read());  
   }
}