Arduino bluetooth robot not responding

Other Hardware Motors, Mechanics, Power and CNC
1

When I plug in the battery to the L298n servo driver, it makes a buzzing sound and the motors don’t respond to commands from the mobile app. The noise stops when I unplug the in1, in2, in3, in4 pins

My project is to make a robot arm and place it on wheels, then control everything through bluetooth using ‘Arduino Bluetooth Control’ by Giumig apps. These are my materials:

  • 3 MG996R servos
  • 2 gear motors from 2WD kit
  • HC-05 bluetooth module
  • L298N motor driver
  • Turnigy 2S 7.4V 2200 mAh Li-po
  • ARDUINO NANO (clone)
  • Vivo 180 (Android)

I uploaded this code:

Robot arm on wheels code

I’m using ‘Arduino Bluetooth control’ by Giumig apps to control the robot’s wheels:

Any help or suggestions would be much appreciated!

2

Please post the code here, using code tags.
Please post schematics.

3

Here is the code:

#include <SoftwareSerial.h> // TX RX software library for bluetooth
#include <Servo.h> // servo library 
Servo myservo1, myservo2, myservo3; // servo name
int bluetoothTx = 0; // bluetooth tx to 10 pin
int bluetoothRx = 1; // bluetooth rx to 11 pin

int motorOne = 3;
int motorOne2 = 4;
int motorTwo = 5;
int motorTwo2 = 6;
SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);


//initial motors pin

char command; 
char Value;

void setup()
{
  myservo1.attach(3); // attach servo signal wire to pin 9
  myservo2.attach(5);
  myservo3.attach(6);
   
  //Setup usb serial connection to computer
  Serial.begin(9600);
  //Setup Bluetooth serial connection to android
  bluetooth.begin(9600);
}
void loop()
{
  while (bluetooth.available() > 0) {
    Value = Serial.read();
    Serial.println(Value);
  }

  if ( Value == 'F') {
    // Robo Pet Run Forward
    digitalWrite(motorOne, HIGH);
    digitalWrite(motorOne2, LOW);
    digitalWrite(motorTwo, HIGH);
    digitalWrite(motorTwo2, LOW);
  } else if (Value == 'B') {
    //Robo Pet Run Backward
    digitalWrite(motorOne, LOW);
    digitalWrite(motorOne2, HIGH);
    digitalWrite(motorTwo, LOW);
    digitalWrite(motorTwo2, HIGH);
  } else if (Value == 'L') {
    //Robo Pet Turn Left
    digitalWrite(motorOne, LOW);
    digitalWrite(motorOne2, LOW);
    digitalWrite(motorTwo, HIGH);
    digitalWrite(motorTwo2, LOW);
  } else if (Value == 'R') {
    //Robo Pet Turn Right
    digitalWrite(motorOne, HIGH);
    digitalWrite(motorOne2, LOW);
    digitalWrite(motorTwo, LOW);
    digitalWrite(motorTwo2, LOW);
  } else if (Value == 'S') {
    //Robo Pet Stop
    digitalWrite(motorOne, LOW);
    digitalWrite(motorOne2, LOW);
    digitalWrite(motorTwo, LOW);
    digitalWrite(motorTwo2, LOW);
  }

  //Read from bluetooth and write to usb serial
  if(bluetooth.available()>= 2 )
  {
    unsigned int servopos = bluetooth.read();
    unsigned int servopos1 = bluetooth.read();
    unsigned int realservo = (servopos1 *256) + servopos;
    Serial.println(realservo);
    if (realservo >= 1000 && realservo <1180) {
      int servo1 = realservo;
      servo1 = map(servo1, 1000, 1180, 0, 180);
      myservo1.write(servo1);
      Serial.println("Servo 1 ON");
      delay(10);
    }
    if (realservo >= 2000 && realservo <2180) {
      int servo2 = realservo;
      servo2 = map(servo2, 2000, 2180, 0, 180);
      myservo2.write(servo2);
      Serial.println("Servo 2 ON");
      delay(10);
    }
    if (realservo >= 3000 && realservo <3180) {
      int servo3 = realservo;
      servo3 = map(servo3, 3000, 3180, 0, 180);
      myservo3.write(servo3);
      Serial.println("Servo 3 ON");
      delay(10);
    }
    
  }
}
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