Driver Code of Wifi-controlled Car to be flashed in Node-MCU - ESP8266

robothon.c

#define frontL  16 //D0  IN1 IN3 L

#define backL  5   //D1  IN2 IN4 L

#define frontR  4  //D2  IN1 IN3 R

#define backR  0   //D3  IN2 IN4 R

#define LED 2



#include <ESP8266WiFi.h>

WiFiClient client;

WiFiServer server(80);

String  data =""; 

const char* ssid = "Priyansh";

const char* password = "12346666";



void connectWiFi()

{

  Serial.println("Connecting to WIFI");

  WiFi.begin(ssid, password);

  while ((!(WiFi.status() == WL_CONNECTED)))

  {

    delay(300);

    Serial.print("..");

  }

  Serial.println("");

  Serial.println("WiFi connected");

  Serial.println("NodeMCU Local IP is : ");

  Serial.print((WiFi.localIP()));

  blinking();

}



void setup() 

{

  Serial.begin(115200);

  connectWiFi();

  pinMode(LED, OUTPUT);

  pinMode(frontL, OUTPUT);

  pinMode(backL, OUTPUT);

  pinMode(backR, OUTPUT);

  pinMode(frontR, OUTPUT);

  server.begin();

}



void leftdown()

{

    digitalWrite(frontR,LOW);

    digitalWrite(backR,HIGH);

    digitalWrite(frontL,LOW);

    digitalWrite(backL,LOW);

    Serial.println("leftdown");

}



void rightdown()

{

    digitalWrite(frontR,LOW);

    digitalWrite(backR,LOW);

    digitalWrite(frontL,LOW);

    digitalWrite(backL,HIGH);

    Serial.println("rightdown");

}



void power()

{

    digitalWrite(frontR,LOW);

    digitalWrite(backR,LOW);

    digitalWrite(frontL,LOW);

    digitalWrite(backL,LOW);

    digitalWrite(LED,HIGH);

    Serial.println("power");

}

void stopbot()

{

    digitalWrite(frontR,LOW);

    digitalWrite(backR,LOW);

    digitalWrite(frontL,LOW);

    digitalWrite(backL,LOW);

    digitalWrite(LED,LOW);

    Serial.println("stop");

}



void sharpright()

{

    digitalWrite(frontR,LOW);

    digitalWrite(backR,HIGH);

    digitalWrite(frontL,HIGH);

    digitalWrite(backL,LOW);

    Serial.println("sharpright");

}



void sharpleft()

{

    digitalWrite(frontR,HIGH);

    digitalWrite(backR,LOW);

    digitalWrite(frontL,LOW);

    digitalWrite(backL,HIGH);

    Serial.println("sharpleft");

}



void up()

{

    digitalWrite(16,HIGH);

    digitalWrite(4,HIGH);

    digitalWrite(14,HIGH);

    digitalWrite(15,HIGH);

    Serial.println("UP");

}



void down()

{

    digitalWrite(frontR,LOW);

    digitalWrite(backR,HIGH);

    digitalWrite(frontL,LOW);

    digitalWrite(backL,HIGH);

    Serial.println("down");

}



void left()

{

    digitalWrite(frontR,HIGH);

    digitalWrite(backR,LOW);

    digitalWrite(frontL,LOW);

    digitalWrite(backL,LOW);

    Serial.println("left");

}



void right()

{

    digitalWrite(frontR,LOW);

    digitalWrite(backR,LOW);

    digitalWrite(frontL,HIGH);

    digitalWrite(backL,LOW);

    Serial.println("right");

}

void blinking() {

  digitalWrite(2, HIGH);

  delay(1000);

  digitalWrite(2, LOW);

  delay(1000);

  Serial.println("blinking");

}

String checkClient (void)

{

  while(!client.available()) delay(1); 

  String request = client.readStringUntil('\r');

  request.remove(0, 5);

  request.remove(request.length()-9,9);

  return request;

}

void loop()

{

    client = server.available();

    if (!client) return; 

    data = checkClient ();

  

    if (data == "up") up();

    

    else if (data == "down") down();

   

    else if (data == "left") left();

   

    else if (data == "right") right();

    

    else if (data == "sharpleft") sharpleft();

   

    else if (data == "sharpright") sharpright();

   

    else if (data == "power") power();

    

    else if (data == "stop") stopbot();



    else if (data == "backleft") leftdown();

    

    else if (data == "backright") rightdown();

    

    delay(500);



    stopbot();

}