Ultrasonic sensor

[thatwoo]

Hello, relatively new in all of this so I am stuck with combining ultrasonic HC-SR04 into my code. Basically I am making Bluetooth remote car (which is working) and now I need to write code which will not allow me to go forward when sensor detects distance less then 30cm for example.

[anon73444976]

We can't see the code you're trying to combine.

[thatwoo]

#include <AFMotor.h>
#include <SoftwareSerial.h>

SoftwareSerial mySerial(A4, A5);

//initial motors pin
AF_DCMotor motor1(1, MOTOR12_1KHZ);
AF_DCMotor motor2(2, MOTOR12_1KHZ);

char command;

void setup()
{
  mySerial.begin(9600); 
}

void loop(){
  if(mySerial.available() > 0){
    command = mySerial.read();
    Stop(); 
    switch(command){
    case 'F':
      forward();
      break;
    case 'B':
       back();
      break;
    case 'L':
      left();
      break;
    case 'R':
      right();
      break;
    }
  }
}

void forward()
{
  motor1.setSpeed(255); 
  motor1.run(BACKWARD); 
  motor2.setSpeed(255); 
  motor2.run(BACKWARD); 
}

void back()
{
  motor1.setSpeed(255); 
  motor1.run(FORWARD); 
  motor2.setSpeed(255); 
  motor2.run(FORWARD); 
}

void left()
{
  motor1.setSpeed(255); 
  motor1.run(BACKWARD);
  motor2.setSpeed(255); 
  motor2.run(FORWARD);  
}

void right()
{
  motor1.setSpeed(255);
  motor1.run(FORWARD); 
  motor2.setSpeed(255); 
  motor2.run(BACKWARD); 
}

void Stop()
{
  motor1.setSpeed(0); 
  motor1.run(RELEASE);
  motor2.setSpeed(0); 
  motor2.run(RELEASE); 

}

This is the code without any parts for ultrasonic which works without problem, I just don't know how to write ultrasonic part. Never worked with it so yeah. Anything helps

[anon73444976]

A common mistake is to take range readings too frequently.
You should try not to exceed more than about 20 to 30 readings per second.