hc-05 bluetooth module is losing connection while commanding

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1

I want to make a bluetooth controlled car.
I have bought myself a hc-05 bluetooth module. It is operating nicely when only it is used in arduino.
When I am connecting arduino with the L298N motor driver shield and connecting bluetooth with arduino's 5V pin and other respective pins, the module is blinking and is easily paired with phone.
(i.e.- hc-05 is not working with 3.3V connection.)

But when I am trying to give command, the connection is lost. It is working nicely if I connect it with my computer.

my code is here::

int AIN1 = 2;
int AIN2 = 3;
int BIN1 = 4;
int BIN2  = 5;
int APWM = 9;
int BPWM = 10; 
int spd =  150;

char data;

void setup()
{
  Serial.begin(9600);
  pinMode(AIN1, OUTPUT);
  pinMode(AIN2, OUTPUT);
  pinMode(BIN1, OUTPUT);
  pinMode(BIN2, OUTPUT);
  pinMode(APWM, OUTPUT);
  pinMode(BPWM, OUTPUT);
}

void loop()
{
   if(Serial.available())
   {
    data = Serial.read();
   }
   analogWrite(APWM, 200);
   analogWrite(BPWM, 200);
   
   if(data == 'S')
   {
    Release();
   }
   if(data == 'F')
   {
    forward();
    delay(10);
   }
   if(data == 'B')
   {
    backward();
    delay(10);
   }
   if(data == 'R')
   {
    right();
    delay(10);
   }
   if(data == 'L')
   {
    left();
    delay(10);
   }
}

void forward()
{
  digitalWrite(AIN1, HIGH);
  digitalWrite(AIN2, LOW);
  digitalWrite(BIN1, HIGH);
  digitalWrite(BIN2, LOW);
}

void backward()
{
  digitalWrite(AIN1, LOW);
  digitalWrite(AIN2, HIGH);
  digitalWrite(BIN1, LOW);
  digitalWrite(BIN2, HIGH);
}

void Release()
{
  digitalWrite(AIN1, LOW);
  digitalWrite(AIN2, LOW);
  digitalWrite(BIN1, LOW);
  digitalWrite(BIN2, LOW);
}

void left()
{
  digitalWrite(AIN1, HIGH);
  digitalWrite(AIN2, LOW);
  digitalWrite(BIN1, LOW);
  digitalWrite(BIN2, HIGH);
}

void right()
{
  digitalWrite(AIN1, LOW);
  digitalWrite(AIN2, HIGH);
  digitalWrite(BIN1, HIGH);
  digitalWrite(BIN2, LOW);
}

I need help in this perspect...

1 Like
2

This might have something to do with the power supply, but this

" It is working nicely if I connect it with my computer"

is far from clear. What do you mean by connection?

3

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