L298N Motor Driver with Arduino

Projects Discussion and Showcase Robotics
#1

I am making a Gesture controlled car with (MPU6050 + nrf24L01 + arduino) as transmitter and (L298N motor driver + nrf24L01 + arduino) as receiver…I am having trouble with the L298N Motor Driver and Arduino…I will give the circuit diagram and the code…THE PROBLEM is when i am connecting the motor driver with the arduino the the IN1 and IN4 is getting activated automatically which is leading the one motor to rotate clockwise and another anti-clockwise and its rotating continuously …and it’s not receiving any data from the transmitter…I am a Newbie and I have to submit my project after the collage opens…please help :frowning: !!!

//Here is the receiver code
#include <SPI.h>      //SPI library for communicate with the nRF24L01+
#include "RF24.h"     //The main library of the nRF24L01+

//Define enable pins of the Motors
const int enbA = 3;
const int enbB = 5;

//Define control pins of the Motors
//If the motors rotate in the opposite direction, you can change the positions of the following pin numbers
const int IN1 = 2;    //Right Motor (-)
const int IN2 = 4;    //Right Motor (+)
const int IN3 = 7;    //Left Motor (+)
const int IN4 = 6;    //Right Motor (-)

//Define variable for the motors speeds
//I have defined a variable for each of the two motors 
//This way you can synchronize the rotation speed difference between the two motors
int RightSpd = 255;
int LeftSpd = 255;

//Define packet for the direction (X axis and Y axis)
int data[2];

//Define object from RF24 library - 9 and 10 are a digital pin numbers to which signals CE and CSN are connected
RF24 radio(9,10);

//Create a pipe addresses for the communicate
const uint64_t pipe = 0xE8E8F0F0E1LL;

void setup(){
  //Define the motor pins as OUTPUT
  pinMode(enbA, OUTPUT);
  pinMode(enbB, OUTPUT);
  pinMode(IN1, OUTPUT);
  pinMode(IN2, OUTPUT);
  pinMode(IN3, OUTPUT);
  pinMode(IN4, OUTPUT);
  
  Serial.begin(9600);
  radio.begin();                    //Start the nRF24 communicate            
  radio.openReadingPipe(1, pipe);   //Sets the address of the transmitter to which the program will receive data.
  radio.startListening();             
  }

void loop(){
  if (radio.available()){
    radio.read(data, sizeof(data));

    if(data[0] > 380){
      //forward            
      analogWrite(enbA, RightSpd);
      analogWrite(enbB, LeftSpd);
      digitalWrite(IN1, HIGH);
      digitalWrite(IN2, LOW);
      digitalWrite(IN3, HIGH);
      digitalWrite(IN4, LOW);
    }
    
    if(data[0] < 310){
      //backward              
      analogWrite(enbA, RightSpd);
      analogWrite(enbB, LeftSpd);
      digitalWrite(IN1, LOW);
      digitalWrite(IN2, HIGH);
      digitalWrite(IN3, LOW);
      digitalWrite(IN4, HIGH);
    }
     
    if(data[1] > 180){
      //left
      analogWrite(enbA, RightSpd);
      analogWrite(enbB, LeftSpd);
      digitalWrite(IN1, HIGH);
      digitalWrite(IN2, LOW);
      digitalWrite(IN3, LOW);
      digitalWrite(IN4, HIGH);
    }

    if(data[1] < 110){
      //right
      analogWrite(enbA, RightSpd);
      analogWrite(enbB, LeftSpd);
      digitalWrite(IN1, LOW);
      digitalWrite(IN2, HIGH);
      digitalWrite(IN3, HIGH);
      digitalWrite(IN4, LOW);
    }

    if(data[0] > 330 && data[0] < 360 && data[1] > 130 && data[1] < 160){
      //stop car
      analogWrite(enbA, 0);
      analogWrite(enbB, 0);
    }
  }
}

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#2

Hi sandip002. Welcome to the forum.
Please go read the sticky posts at the top of the forum. They cover much info on helping us help you.
Things like how to post pictures.

Arduino and motor driver.JPG
Arduino and motor driver.JPG1567×768 97.8 KB

Wifi and arduino.JPG
Wifi and arduino.JPG1560×720 112 KB

And posting code in code tags like this

//Mert Arduino and Tech YouTube Channel -- https://goo.gl/ivcZhW

//Add the necessary libraries
//You can find all the necessary library links in the video description
#include <SPI.h>      //SPI library for communicate with the nRF24L01+
#include "RF24.h"     //The main library of the nRF24L01+

//Define enable pins of the Motors
const int enbA = 3;
const int enbB = 5;

//Define control pins of the Motors
//If the motors rotate in the opposite direction, you can change the positions of the following pin numbers
const int IN1 = 2;    //Right Motor (-)
const int IN2 = 4;    //Right Motor (+)
const int IN3 = 7;    //Left Motor (+)
const int IN4 = 6;    //Right Motor (-)

//Define variable for the motors speeds
//I have defined a variable for each of the two motors
//This way you can synchronize the rotation speed difference between the two motors
int RightSpd = 255;
int LeftSpd = 255;

//Define packet for the direction (X axis and Y axis)
int data[2];

//Define object from RF24 library - 9 and 10 are a digital pin numbers to which signals CE and CSN are connected
RF24 radio(9, 10);

//Create a pipe addresses for the communicate
const uint64_t pipe = 0xE8E8F0F0E1LL;

void setup() {
  //Define the motor pins as OUTPUT
  pinMode(enbA, OUTPUT);
  pinMode(enbB, OUTPUT);
  pinMode(IN1, OUTPUT);
  pinMode(IN2, OUTPUT);
  pinMode(IN3, OUTPUT);
  pinMode(IN4, OUTPUT);

  Serial.begin(9600);
  radio.begin();                    //Start the nRF24 communicate
  radio.openReadingPipe(1, pipe);   //Sets the address of the transmitter to which the program will receive data.
  radio.startListening();
}

void loop() {
  if (radio.available()) {
    radio.read(data, sizeof(data));

    if (data[0] > 380) {
      //forward
      analogWrite(enbA, RightSpd);
      analogWrite(enbB, LeftSpd);
      digitalWrite(IN1, HIGH);
      digitalWrite(IN2, LOW);
      digitalWrite(IN3, HIGH);
      digitalWrite(IN4, LOW);
    }

    if (data[0] < 310) {
      //backward
      analogWrite(enbA, RightSpd);
      analogWrite(enbB, LeftSpd);
      digitalWrite(IN1, LOW);
      digitalWrite(IN2, HIGH);
      digitalWrite(IN3, LOW);
      digitalWrite(IN4, HIGH);
    }

    if (data[1] > 180) {
      //left
      analogWrite(enbA, RightSpd);
      analogWrite(enbB, LeftSpd);
      digitalWrite(IN1, HIGH);
      digitalWrite(IN2, LOW);
      digitalWrite(IN3, LOW);
      digitalWrite(IN4, HIGH);
    }

    if (data[1] < 110) {
      //right
      analogWrite(enbA, RightSpd);
      analogWrite(enbB, LeftSpd);
      digitalWrite(IN1, LOW);
      digitalWrite(IN2, HIGH);
      digitalWrite(IN3, HIGH);
      digitalWrite(IN4, LOW);
    }

    if (data[0] > 330 && data[0] < 360 && data[1] > 130 && data[1] < 160) {
      //stop car
      analogWrite(enbA, 0);
      analogWrite(enbB, 0);
    }
  }
}
#3