Andriy Baranov
Published © GPL3+

From BT To WiFi: Creating WiFi Controlled Arduino Robot Car

NodeMCU ESP8266 in access point mode: the simplest way to make Wi-Fi controlled Robot Car from Bluetooth Arduino Robot Car + Android App.

IntermediateProtip1 hour32,620
From BT To WiFi: Creating WiFi Controlled Arduino Robot Car

Things used in this project

Hardware components

NodeMCU ESP8266 Breakout Board
NodeMCU ESP8266 Breakout Board
×1
Arduino UNO & Genuino UNO
Arduino UNO & Genuino UNO
×1
Breadboard (generic)
Breadboard (generic)
×2
Dual H-Bridge motor drivers L298
SparkFun Dual H-Bridge motor drivers L298
×2
4WD Smart Robot Car Chassis Kit
×1
LED (generic)
LED (generic)
×2
Resistor 221 ohm
Resistor 221 ohm
×2
Jumper wires (generic)
Jumper wires (generic)
×1
battery holder
×1
18650 Li-ion Battery
×2

Software apps and online services

MIT App Inventor
MIT App Inventor
Arduino IDE
Arduino IDE

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)

Story

Read more

Custom parts and enclosures

Wi-Fi Robot .apk file

Wi-Fi Robot .aia file

If you want to change .apk file

Schematics

wifi_robot_car_dWyN5trVCL.fzz

wifi_robot_car__E1hC3P8VcK.jpg

Wifi robot car  e1hc3p8vck

Code

WiFi_Robot4_arduinoUno.ino

Arduino
Code for Arduino Uno board
#define light_FR  14    //LED Front Right   pin A0 for Arduino Uno
#define light_FL  15    //LED Front Left    pin A1 for Arduino Uno
#define horn_Buzz 18    //Horn Buzzer       pin A4 for Arduino Uno

#define ENA_m1 5        // Enable/speed motor Front Right 
#define ENB_m1 6        // Enable/speed motor Back Right
#define ENA_m2 10       // Enable/speed motor Front Left
#define ENB_m2 11       // Enable/speed motor Back Left

#define IN_11  2    		// L298N #1 in 1 motor Front Right
#define IN_12  3    		// L298N #1 in 2 motor Front Right
#define IN_13  4    		// L298N #1 in 3 motor Back Right
#define IN_14  7    		// L298N #1 in 4 motor Back Right

#define IN_21  8    		// L298N #2 in 1 motor Front Left
#define IN_22  9    		// L298N #2 in 2 motor Front Left
#define IN_23  12   		// L298N #2 in 3 motor Back Left
#define IN_24  13   		// L298N #2 in 4 motor Back Left

int command; 			      //Int to store app command state.
int speedCar = 100; 		// 50 - 255.
int speed_Coeff = 4;
boolean lightFront = false;
boolean horn = false;

void setup() {  
   
	  pinMode(light_FR, OUTPUT);
    pinMode(light_FL, OUTPUT);
    pinMode(horn_Buzz, OUTPUT);
    
	  pinMode(ENA_m1, OUTPUT);
  	pinMode(ENB_m1, OUTPUT);
	  pinMode(ENA_m2, OUTPUT);
	  pinMode(ENB_m2, OUTPUT);
  
    pinMode(IN_11, OUTPUT);
    pinMode(IN_12, OUTPUT);
    pinMode(IN_13, OUTPUT);
    pinMode(IN_14, OUTPUT);
    
    pinMode(IN_21, OUTPUT);
    pinMode(IN_22, OUTPUT);
    pinMode(IN_23, OUTPUT);
    pinMode(IN_24, OUTPUT);

	Serial.begin(115200); 

  } 

void goAhead(){ 

      digitalWrite(IN_11, HIGH);
      digitalWrite(IN_12, LOW);
	    analogWrite(ENA_m1, speedCar);

      digitalWrite(IN_13, LOW);
      digitalWrite(IN_14, HIGH);
	    analogWrite(ENB_m1, speedCar);


      digitalWrite(IN_21, LOW);
      digitalWrite(IN_22, HIGH);
	    analogWrite(ENA_m2, speedCar);


      digitalWrite(IN_23, HIGH);
      digitalWrite(IN_24, LOW);
	    analogWrite(ENB_m2, speedCar);

  }

void goBack(){ 

      digitalWrite(IN_11, LOW);
      digitalWrite(IN_12, HIGH);
	    analogWrite(ENA_m1, speedCar);


      digitalWrite(IN_13, HIGH);
      digitalWrite(IN_14, LOW);
	    analogWrite(ENB_m1, speedCar);


      digitalWrite(IN_21, HIGH);
      digitalWrite(IN_22, LOW);
	    analogWrite(ENA_m2, speedCar);


      digitalWrite(IN_23, LOW);
      digitalWrite(IN_24, HIGH);
	    analogWrite(ENB_m2, speedCar);

  }

void goRight(){ 

      digitalWrite(IN_11, LOW);
      digitalWrite(IN_12, HIGH);
	    analogWrite(ENA_m1, speedCar);


      digitalWrite(IN_13, HIGH);
      digitalWrite(IN_14, LOW);
	    analogWrite(ENB_m1, speedCar);


      digitalWrite(IN_21, LOW);
      digitalWrite(IN_22, HIGH);
	    analogWrite(ENA_m2, speedCar);


      digitalWrite(IN_23, HIGH);
      digitalWrite(IN_24, LOW);
	    analogWrite(ENB_m2, speedCar);


  }

void goLeft(){

      digitalWrite(IN_11, HIGH);
      digitalWrite(IN_12, LOW);
	    analogWrite(ENA_m1, speedCar);


      digitalWrite(IN_13, LOW);
      digitalWrite(IN_14, HIGH);
	    analogWrite(ENB_m1, speedCar);

        
      digitalWrite(IN_21, HIGH);
      digitalWrite(IN_22, LOW);
	    analogWrite(ENA_m2, speedCar);


      digitalWrite(IN_23, LOW);
      digitalWrite(IN_24, HIGH);
	    analogWrite(ENB_m2, speedCar);

        
  }

void goAheadRight(){
      
      digitalWrite(IN_11, HIGH);
      digitalWrite(IN_12, LOW);
      analogWrite(ENA_m1, speedCar/speed_Coeff);

      digitalWrite(IN_13, LOW);
      digitalWrite(IN_14, HIGH);
      analogWrite(ENB_m1, speedCar/speed_Coeff);


      digitalWrite(IN_21, LOW);
      digitalWrite(IN_22, HIGH);
      analogWrite(ENA_m2, speedCar);


      digitalWrite(IN_23, HIGH);
      digitalWrite(IN_24, LOW);
      analogWrite(ENB_m2, speedCar);
 
  }

void goAheadLeft(){
      
      digitalWrite(IN_11, HIGH);
      digitalWrite(IN_12, LOW);
      analogWrite(ENA_m1, speedCar);

      digitalWrite(IN_13, LOW);
      digitalWrite(IN_14, HIGH);
      analogWrite(ENB_m1, speedCar);


      digitalWrite(IN_21, LOW);
      digitalWrite(IN_22, HIGH);
      analogWrite(ENA_m2, speedCar/speed_Coeff);


      digitalWrite(IN_23, HIGH);
      digitalWrite(IN_24, LOW);
      analogWrite(ENB_m2, speedCar/speed_Coeff);
 
  }

void goBackRight(){ 

      digitalWrite(IN_11, LOW);
      digitalWrite(IN_12, HIGH);
      analogWrite(ENA_m1, speedCar/speed_Coeff);


      digitalWrite(IN_13, HIGH);
      digitalWrite(IN_14, LOW);
      analogWrite(ENB_m1, speedCar/speed_Coeff);


      digitalWrite(IN_21, HIGH);
      digitalWrite(IN_22, LOW);
      analogWrite(ENA_m2, speedCar);


      digitalWrite(IN_23, LOW);
      digitalWrite(IN_24, HIGH);
      analogWrite(ENB_m2, speedCar);

  }

void goBackLeft(){ 

      digitalWrite(IN_11, LOW);
      digitalWrite(IN_12, HIGH);
      analogWrite(ENA_m1, speedCar);


      digitalWrite(IN_13, HIGH);
      digitalWrite(IN_14, LOW);
      analogWrite(ENB_m1, speedCar);


      digitalWrite(IN_21, HIGH);
      digitalWrite(IN_22, LOW);
      analogWrite(ENA_m2, speedCar/speed_Coeff);


      digitalWrite(IN_23, LOW);
      digitalWrite(IN_24, HIGH);
      analogWrite(ENB_m2, speedCar/speed_Coeff);

  }

void stopRobot(){  

      digitalWrite(IN_11, LOW);
      digitalWrite(IN_12, LOW);
	    analogWrite(ENA_m1, speedCar);


      digitalWrite(IN_13, LOW);
      digitalWrite(IN_14, LOW);
	    analogWrite(ENB_m1, speedCar);

  
      digitalWrite(IN_21, LOW);
      digitalWrite(IN_22, LOW);
	    analogWrite(ENA_m2, speedCar);

      
      digitalWrite(IN_23, LOW);
      digitalWrite(IN_24, LOW);
	    analogWrite(ENB_m2, speedCar);
  
  }
  
void loop(){
    
if (Serial.available() > 0) {
	command = Serial.read();
	
if (lightFront) {digitalWrite(light_FR, HIGH); digitalWrite(light_FL, HIGH);}
if (!lightFront) {digitalWrite(light_FR, LOW); digitalWrite(light_FL, LOW);}
if (horn) {digitalWrite(horn_Buzz, HIGH);}
if (!horn) {digitalWrite(horn_Buzz, LOW);}

switch (command) {
case 'F':goAhead();break;
case 'B':goBack();break;
case 'L':goLeft();break;
case 'R':goRight();break;
case 'I':goAheadRight();break;
case 'G':goAheadLeft();break;
case 'J':goBackRight();break;
case 'H':goBackLeft();break;
case '0':speedCar = 100;break;
case '1':speedCar = 120;break;
case '2':speedCar = 135;break;
case '3':speedCar = 155;break;
case '4':speedCar = 170;break;
case '5':speedCar = 185;break;
case '6':speedCar = 195;break;
case '7':speedCar = 215;break;
case '8':speedCar = 235;break;
case '9':speedCar = 255;break;
case 'S':stopRobot();break;
case 'W':lightFront = true;break;
case 'w':lightFront = false;break;
case 'V':horn = true;break;
case 'v':horn = false;break;

}
}
}

WiFi_Robot4_NodeMCU_ESP8266.ino

Arduino
Code for NodeMCU_ESP8266 board
#include <ESP8266WiFi.h>
#include <WiFiClient.h> 
#include <ESP8266WebServer.h>

const char* host = "WiFi_Robot4_NodeMCU";
const char* ssid = "WiFi_Robot4";

ESP8266WebServer server(80);

void setup() {
  Serial.begin(115200);
  

// Connecting WiFi

  WiFi.mode(WIFI_AP);
  WiFi.softAP(ssid);
// Starting WEB-server
    
     server.on ( "/", HTTP_handleRoot );
     server.onNotFound ( HTTP_handleRoot );
     server.begin();    
     
}

void loop() {
  server.handleClient();
   delay(50);
}

void HTTP_handleRoot(void) {

if( server.hasArg("State") ){
       Serial.println(server.arg("State"));
  }
  server.send ( 200, "text/html", "" );
}

Credits

Andriy Baranov

Andriy Baranov

1 project • 138 followers

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