Obsatcle Avoidance Robot Car CODE PROBLEM

Projects General Guidance
1

Hello everyone, this is now my third day struggling to figure out what the problem of my robot is so please help me, the sensor works fine but it wont move

obstacle_avoiding_robot_with_l298n_circuit_wdgmzAxb9G
obstacle_avoiding_robot_with_l298n_circuit_wdgmzAxb9G3573×1674 342 KB

this is the wiring that i have and this is my code

#include <Servo.h> //Servo motor library. This is standard library
#include <NewPing.h> //Ultrasonic sensor function library. You must install this library
//our L298N control pins
const int LeftMotorForward = 7;
const int LeftMotorBackward = 6;
const int RightMotorForward = 4;
const int RightMotorBackward = 5;
//sensor pins
#define trig_pin A0 //analog input 1
#define echo_pin A1 //analog input 2
#define maximum_distance 200
boolean goesForward = false;
int distance = 100;
NewPing sonar(trig_pin, echo_pin, maximum_distance); //sensor function
Servo servo_motor; //our servo name
void setup(){
  pinMode(RightMotorForward, OUTPUT);
  pinMode(LeftMotorForward, OUTPUT);
  pinMode(LeftMotorBackward, OUTPUT);
  pinMode(RightMotorBackward, OUTPUT);
  servo_motor.attach(10); //our servo pin
  servo_motor.write(115);
  delay(2000);
  distance = readPing();
  delay(100);
  distance = readPing();
  delay(100);
  distance = readPing();
  delay(100);
  distance = readPing();
  delay(100);
}
void loop(){
  distance = readPing();
  delay(10);
  int distanceRight = 0;
  int distanceLeft = 0;
  delay(10);
  if (distance <= 20){
    moveStop();
    delay(300);
    moveBackward();
    delay(400);
    moveStop();
    delay(300);
    distanceRight = lookRight();
    delay(300);
    distanceLeft = lookLeft();
    delay(300);
    if (distanceRight >= distanceLeft){
      turnRight();
      moveStop();
    }
    else{
      turnLeft();
      moveStop();
    }
  }
  else{
    moveForward();
  }
    distance = readPing();
}
int lookRight(){
  servo_motor.write(50);
  delay(500);
  int distance = readPing();
  delay(100);
  servo_motor.write(115);
  return distance;
}
int lookLeft(){
  servo_motor.write(170);
  delay(500);
  int distance = readPing();
  delay(100);
  servo_motor.write(115);
  return distance;
  delay(100);
}
int readPing(){
  delay(70);
  int cm;
  cm = sonar.ping_cm();
  if (cm==0){
    cm=250;
  }
  return cm;
}
void moveStop(){
  digitalWrite(RightMotorForward, LOW);
  digitalWrite(LeftMotorForward, LOW);
  digitalWrite(RightMotorBackward, LOW);
  digitalWrite(LeftMotorBackward, LOW);
}
void moveForward(){
  if(!goesForward){
    goesForward=true;
    digitalWrite(LeftMotorForward, HIGH);
    digitalWrite(RightMotorForward, HIGH);
    digitalWrite(LeftMotorBackward, LOW);
    digitalWrite(RightMotorBackward, LOW);
  }
}
void moveBackward(){
  goesForward=false;
  digitalWrite(LeftMotorBackward, HIGH);
  digitalWrite(RightMotorBackward, HIGH);
  digitalWrite(LeftMotorForward, LOW);
  digitalWrite(RightMotorForward, LOW);
}
void turnRight(){
  digitalWrite(LeftMotorForward, HIGH);
  digitalWrite(RightMotorBackward, HIGH);
  digitalWrite(LeftMotorBackward, LOW);
  digitalWrite(RightMotorForward, LOW);
  delay(500);
  digitalWrite(LeftMotorForward, HIGH);
  digitalWrite(RightMotorForward, HIGH);
  digitalWrite(LeftMotorBackward, LOW);
  digitalWrite(RightMotorBackward, LOW);
 }
void turnLeft(){
  digitalWrite(LeftMotorBackward, HIGH);
  digitalWrite(RightMotorForward, HIGH);
  digitalWrite(LeftMotorForward, LOW);
  digitalWrite(RightMotorBackward, LOW);
  delay(500);
  digitalWrite(LeftMotorForward, HIGH);
  digitalWrite(RightMotorForward, HIGH);
  digitalWrite(LeftMotorBackward, LOW);
  digitalWrite(RightMotorBackward, LOW);
}
2

Thanks, "it won't move" refers to the robot, i.e. the motors don't come on? Have you written any simple test sketch to verify only that the motors work? You need to "divide and conquer", otherwise the solution is too hard to guess (you could sit and stare at code for hours...).

3

the motors work foíne on their own i tested them

4

How did you test them? And, how do you know that the sensor works, like you said?

5

the sesnor moves around and does its part of the code
and the gear motors i tested them before assembling the car to make sure that they work, which they did

6

You ignored my question. I asked you how.

7

with a multimeter

8

That doesn't test your motor code. See reply #2. Also you can't really test a motor with a DMM. It also excludes the motor driver circuit.

Maybe you have a wiring error. Very few people here are willing to sit and decipher a Fritzing, so if your test sketch doesn't work, please post a real schematic.