ATCommander.ino

#include <SoftwareSerial.h>

SoftwareSerial BTSerial(10, 11); // RX | TX

void setup() {
  pinMode(9, OUTPUT);
  digitalWrite(9, HIGH);
  Serial.begin(9600);
  Serial.println("Enter AT commands:");
  BTSerial.begin(9600); 
}

void loop() {

  // Keep reading from HC-06 and send to Arduino Serial Monitor
  if (BTSerial.available()) {
    Serial.write(BTSerial.read());
  }

  // Keep reading from Arduino Serial Monitor and send to HC-06
  if (Serial.available()) {
    BTSerial.write(Serial.read());
  }
}