Bluetooth Robot Car bluetooth not appearing on the app

I don't know if this related to arduino but I haven't found the solution yet.
I'm making a 2 wheeled Bluetooth RC car using Arduino Uno, L298N driver, HC05 Bluetooth Module, 4 X AA Battery. after i connected all the wires the bluetooth doesn't appear on the Arduino bluetooth controller app
Anyone know what did I miss?

char cmd;//The Bluetooth Command

//The L298N Control Pins
const int rightMotorForward = 2;
const int rightMotorBackward = 3;

const int leftMotorForward = 4;
const int leftMotorBackward = 5;
 
void setup() {
  pinMode(leftMotorForward,OUTPUT);   //left motor forward
  pinMode(leftMotorBackward,OUTPUT);   //left motor reverse
  pinMode(rightMotorForward,OUTPUT);   //right motor forward
  pinMode(rightMotorBackward,OUTPUT);   //right motor reverse
  Serial.begin(9600);
}
 
void loop() {
  if(Serial.available()){
    cmd = Serial.read();
  }
   
  if(cmd == 'F'){           //move forward
    digitalWrite(leftMotorForward,HIGH);
    digitalWrite(rightMotorForward,HIGH);
  }
   
  else if(cmd == 'B'){      //move reverse
    digitalWrite(leftMotorBackward,HIGH);
    digitalWrite(rightMotorBackward,HIGH);
  }
   
  else if(cmd == 'L'){      //turn Left
    digitalWrite(rightMotorForward,HIGH);
  }
   
  else if(cmd == 'R'){      //turn Right
    digitalWrite(leftMotorForward,HIGH);
  }
   
  else{      //STOP (all motors stop)
    digitalWrite(leftMotorForward,LOW);
    digitalWrite(leftMotorBackward,LOW);
    digitalWrite(rightMotorForward,LOW);
    digitalWrite(rightMotorBackward,LOW);
  }
  delay(50);

Hi! Welcome to the forum.

Your Fritzzy drawing doesn´t show the HC-05 module. How is it connected to the Uno?

Before connecting the HC-05 to the BT app (which app?) it must be paired with the cell phone.

When you have some time, take a look at How to get the best out of this forum.. It gives you some clues on what info we will need to help you in a better way.

Have fun! :upside_down_face:

sorry this is my first time using the forum
this is the app I'm using and this is how I connected the wires


The HC-05 RX/TX pins work with 3.3V, so it will be interesting to use a voltage divider at HC-05 RX line.

When you turn on the bluetooth at your cell phone and the HC-05 is powered, can you see it among the available devices to connect?

No It doesn't appear

What is the blink pattern of the powered HC05?
What model phone?

crystal 26MHz and status LED
and I'm using a Samsung Galaxy A51
and i tried ather android phones
photo_2023-06-01_20-17-00

By blinking pattern, @cattledog is asking how many times per second the status LED is blinking.

2 per second

The constant 2Hz flash is indeed the pattern you should see if the HC05 is in communication mode but not connected. The phone should see it.

The module may be defective. See this thread about a similar situation
https://forum.arduino.cc/t/hc-05-weird-blinking-and-doesnt-shown-on-bluetooth-search/961286