Change AT settings of the HC-05

HC-05_Commander.ino

// Dehan Lamprecht, 2020
// Allows changing the settings of the HC-05 module
// Adapted from https://www.instructables.com/id/Program-an-Arduino-Wireless-Over-Bluetooth/

#include <SoftwareSerial.h>
SoftwareSerial BTSerial(2, 3); // RX | TX

void setup() {
  // Set PIN 9 to HIGH for getting HC-05 into AT mode
  // Check Step 4 of link for instructions
  pinMode(9, OUTPUT);
  digitalWrite(9, HIGH);
  Serial.begin(9600);
  Serial.println("Enter AT Commands: ");
  BTSerial.begin(38400); // default baud rate for AT mode
}

void loop() {
  if (BTSerial.available()){
    Serial.write(BTSerial.read());
  }

  if (Serial.available()){
    BTSerial.write(Serial.read());
  }
}