HC05config.ino

// https://retroetgeek.com/arduino/configuration-du-module-hc-05-pour-arduino/
// https://www.aranacorp.com/fr/votre-arduino-communique-avec-le-module-hc-05/

#include <SoftwareSerial.h>

// Mapping Arduino Digital ports to Bluetooth Serial
//#define rxPin 5
//#define txPin 4
#define rxPin A4
#define txPin A5

#define atmodePin 9
#define baudrate 38400

SoftwareSerial hc05(rxPin, txPin);

void setup() {

   // passage en mode AT
   pinMode(atmodePin, OUTPUT);
   digitalWrite(atmodePin, HIGH);

   Serial.begin(9600);
   Serial.println("ENTER AT Commands:");
   hc05.begin(baudrate);
}

void loop() {

   if (hc05.available())
      Serial.write(hc05.read());

   if (Serial.available())
      hc05.write(Serial.read());
}