gistfile1.html

int motorPin1 = 7; 
int motorPin2 = 8; 
int enablePin_1 = 6;
int motorPin4 = 2;
int motorPin3 = 4;
int enablePin_2 =3 ;
int buzzer = 11;
int f_b_light = 12 ; 
int state;
int flag=0; //makes sure that the serial only prints once the state
boolean buzzerstatus = 0;
boolean LEDstatus = 0;

#include <LiquidCrystal.h>

LiquidCrystal lcd(13, 10, 9, A0, A1, A2);

void setup() {
// sets the pins as outputs:
 lcd.begin(16, 2);
 pinMode(buzzer,OUTPUT);
 pinMode(f_b_light,OUTPUT);
  pinMode(motorPin1, OUTPUT);
  pinMode(motorPin2, OUTPUT);
  pinMode(enablePin_1, OUTPUT);
  pinMode(motorPin3, OUTPUT);
  pinMode(motorPin4, OUTPUT);
  pinMode(enablePin_2, OUTPUT);
// sets enablePin high so that motor can turn on:
  digitalWrite(enablePin_1, HIGH);
  digitalWrite(enablePin_2, HIGH);
  pinMode(13,OUTPUT);
// initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
}
 
void loop() {
//if some date is sent, reads it and saves in state
        if(Serial.available() > 0){
          state = Serial.read();
          flag=0;
}
// if the state is '0' the DC motor will turn off
        if (state == '0') {
          digitalWrite(f_b_light,LOW);
            digitalWrite(buzzer,LOW);
            digitalWrite(motorPin1, LOW); // set pin 2 on L293D low
            digitalWrite(motorPin2, LOW); // set pin 7 on L293D low
            digitalWrite(motorPin3, LOW); // set pin 2 on L293D low
            digitalWrite(motorPin4, LOW); // set pin 7 on L293D low
              if(flag == 0){
                lcd.clear();
                lcd.setCursor(0, 0);
               lcd.print("Current State:");
               lcd.setCursor(0, 1);
               lcd.print("STOP");
                flag=1;
                }
          }
// if the state is '1' the motor will forward
         else if (state == '1') {
            digitalWrite(f_b_light,LOW);
            digitalWrite(buzzer,LOW);
            digitalWrite(motorPin1, LOW); // set pin 2 on L293D low
            digitalWrite(motorPin2, HIGH); // set pin 7 on L293D high
            digitalWrite(motorPin3, LOW); // set pin 2 on L293D low
            digitalWrite(motorPin4, HIGH); // set pin 7 on L293D high
              if(flag == 0){
                lcd.setCursor(0, 0);
                lcd.print("Current State:");
                lcd.setCursor(0, 1);
               lcd.print("FORWARD");
                flag=1;
                  }
          }
// if the state is '2' the motor will backward
          else if (state == '2') {
            digitalWrite(f_b_light,LOW);
            digitalWrite(buzzer,LOW);
            digitalWrite(motorPin1, HIGH); // set pin 2 on L293D high
            digitalWrite(motorPin2, LOW); // set pin 7 on L293D low
            digitalWrite(motorPin3, HIGH); // set pin 2 on L293D high
            digitalWrite(motorPin4, LOW); // set pin 7 on L293D low
              if(flag == 0){
                lcd.setCursor(0, 0);
                lcd.print("Current State:");
                lcd.setCursor(0, 1);
               lcd.print("REVERSE");
                flag=1;
                  }
          }
          
          else if (state == '3') {
             digitalWrite(f_b_light,LOW);
            digitalWrite(buzzer,LOW);
            digitalWrite(motorPin1, LOW); // set pin 2 on L293D high
            digitalWrite(motorPin2, HIGH); // set pin 7 on L293D low
            digitalWrite(motorPin3, LOW); // set pin 2 on L293D high
            digitalWrite(motorPin4, LOW); // set pin 7 on L293D low
              if(flag == 0){
                 lcd.setCursor(0, 0);
                lcd.print("Current State:");
                lcd.setCursor(0, 1);
               lcd.print("RIGHT");
                flag=1; //Left wheel forward, Right wheel static
                flag=1;
                  }
          }
           else if (state == '4') {
              digitalWrite(f_b_light,LOW);
            digitalWrite(buzzer,LOW);
             digitalWrite(motorPin1, LOW); // set pin 2 on L293D high
             digitalWrite(motorPin2, LOW); // set pin 7 on L293D low
             digitalWrite(motorPin3, LOW); // set pin 2 on L293D high
             digitalWrite(motorPin4, HIGH); // set pin 7 on L293D low
                if(flag == 0){
                  lcd.clear();
                   lcd.setCursor(0, 0);
                lcd.print("Current State:");
                lcd.setCursor(0, 1);
               lcd.print("LEFT");
                flag=1;
                    }
          }
           else if (state == '5') {
             
             digitalWrite(buzzer,HIGH);
                if(flag == 0){
                  lcd.clear();
                   lcd.setCursor(0, 0);
                lcd.print("Current State:");
                lcd.setCursor(0, 1);
               lcd.print("Buzzer ON");
                flag=1;
                    }
          }
           else if (state == '6') {
           
            digitalWrite(f_b_light,HIGH);
                if(flag == 0){
                   lcd.setCursor(0, 0);
                lcd.print("Current State:");
                lcd.setCursor(0, 1);
               lcd.print("LIGHT ON");
                flag=1;
                    }
          }

}