Nodemcu-esp8266-wifi(home_router)-car.ino

// updated -> 18-feb-2021 by Shahriar Shafin

#include <ESP8266WiFi.h>
WiFiClient client;
WiFiServer server(80);
const char* ssid = "Network Unavailable";
const char* password = "dontshare";
String  data = "";
int leftMotorForward = 2;
int rightMotorForward = 15;
int leftMotorBackward = 0;
int rightMotorBackward = 13;
int rightMotorENB = 14;
int leftMotorENB = 12;
void setup()
{
  pinMode(leftMotorForward, OUTPUT);
  pinMode(rightMotorForward, OUTPUT);
  pinMode(leftMotorBackward, OUTPUT);
  pinMode(rightMotorBackward, OUTPUT);
  pinMode(leftMotorENB, OUTPUT);
  pinMode(rightMotorENB, OUTPUT);
  pinMode(D2, OUTPUT);     // the horn pin as an output
  server.begin();
}
void loop()
{
  client = server.available();
  if (!client) return;
  data = checkClient ();
  if (data == "f") MotorForward();
  else if (data == "b") MotorBackward();
  else if (data == "left") left();   //wheel left
  else if (data == "right") right(); //wheel right
  else if (data == "l") TurnLeft();
  else if (data == "r") TurnRight();
  else if (data == "br") BackRight();
  else if (data == "bl") BackLeft();
  else if (data == "s") MotorStop();
  else if (data == "ho") hornOn();
  else if (data == "hf") hornOff();
  else if (data == "rst") resetMCU();
}

void resetMCU(void)
{
ESP.restart();
}
void hornOn(void)
{
  digitalWrite(D2, HIGH);
}
void hornOff(void)
{
  digitalWrite(D2, LOW);
}

void MotorForward(void)
{
  digitalWrite(leftMotorENB, LOW);
  digitalWrite(rightMotorENB, HIGH);
  digitalWrite(leftMotorForward, LOW);
  digitalWrite(rightMotorForward, HIGH);
  digitalWrite(leftMotorBackward, LOW);
  digitalWrite(rightMotorBackward, LOW);
}
void MotorBackward(void)
{
  digitalWrite(leftMotorENB, LOW);
  digitalWrite(rightMotorENB, HIGH);
  digitalWrite(leftMotorForward, LOW);
  digitalWrite(rightMotorForward, LOW);
  digitalWrite(leftMotorBackward, LOW);
  digitalWrite(rightMotorBackward, HIGH);
}
void left(void)
{
  digitalWrite(leftMotorENB, HIGH);
  digitalWrite(rightMotorENB, LOW);
  digitalWrite(leftMotorForward, LOW);
  digitalWrite(rightMotorForward, LOW);
  digitalWrite(leftMotorBackward, HIGH);
  digitalWrite(rightMotorBackward, LOW);
}
void right(void)
{
  digitalWrite(leftMotorENB, HIGH);
  digitalWrite(rightMotorENB, LOW);
  digitalWrite(leftMotorForward, HIGH);
  digitalWrite(rightMotorForward, LOW);
  digitalWrite(leftMotorBackward, LOW);
  digitalWrite(rightMotorBackward, LOW);
}
void TurnLeft(void)
{
  digitalWrite(leftMotorENB, HIGH);
  digitalWrite(rightMotorENB, HIGH);
  digitalWrite(leftMotorForward, LOW);
  digitalWrite(rightMotorForward, HIGH);
  digitalWrite(rightMotorBackward, LOW);
  digitalWrite(leftMotorBackward, HIGH);
}
void TurnRight(void)
{
  digitalWrite(leftMotorENB, HIGH);
  digitalWrite(rightMotorENB, HIGH);
  digitalWrite(leftMotorForward, HIGH);
  digitalWrite(rightMotorForward, HIGH);
  digitalWrite(rightMotorBackward, LOW);
  digitalWrite(leftMotorBackward, LOW);
}
void BackLeft(void)
{
  digitalWrite(leftMotorENB, HIGH);
  digitalWrite(rightMotorENB, HIGH);
  digitalWrite(leftMotorForward, LOW);
  digitalWrite(rightMotorForward, LOW);
  digitalWrite(leftMotorBackward, HIGH);
  digitalWrite(rightMotorBackward, HIGH);
}
void BackRight(void)
{
  digitalWrite(leftMotorENB, HIGH);
  digitalWrite(rightMotorENB, HIGH);
  digitalWrite(leftMotorForward, HIGH);
  digitalWrite(rightMotorForward, LOW);
  digitalWrite(rightMotorBackward, HIGH);
  digitalWrite(leftMotorBackward, LOW);
}
void MotorStop(void)
{
  digitalWrite(leftMotorENB, LOW);
  digitalWrite(rightMotorENB, LOW);
  digitalWrite(leftMotorForward, LOW);
  digitalWrite(leftMotorBackward, LOW);
  digitalWrite(rightMotorForward, LOW);
  digitalWrite(rightMotorBackward, LOW);
}
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;
}