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#include <Servo.h> //includes the servo library #include <Wire.h> #include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x3f,20,40,20)

Servo myservo;

#define ir_enter 2 #define ir_back 4

#define ir_car1 5 #define ir_car2 6 #define ir_car3 7 #define ir_car4 8 #define ir_car5 9 #define ir_car6 10

int S1=0, S2=0, S3=0, S4=0, S5=0, S6=0; int flag1=0, flag2=0; int slot = 6;

void setup(){ Serial.begin(9600);

pinMode(ir_car1, INPUT); pinMode(ir_car2, INPUT); pinMode(ir_car3, INPUT); pinMode(ir_car4, INPUT); pinMode(ir_car5, INPUT); pinMode(ir_car6, INPUT);

pinMode(ir_enter, INPUT); pinMode(ir_back, INPUT);

myservo.attach(3); myservo.write(90);

lcd.begin(); lcd.setCursor (0,1); lcd.print(" Car parking "); lcd.setCursor (0,2); lcd.print(" System "); delay (2000); lcd.clear();

Read_Sensor();

int total = S1+S2+S3+S4+S5+S6; slot = slot-total; }

void loop(){

Read_Sensor();

lcd.setCursor (0,0); lcd.print(" Have Slot: "); lcd.print(slot); lcd.print(" ");

lcd.setCursor (0,1); if(S1==1){lcd.print("S1:Fill ");} else{lcd.print("S1:Empty");}

lcd.setCursor (10,1); if(S2==1){lcd.print("S2:Fill ");} else{lcd.print("S2:Empty");}

lcd.setCursor (0,2); if(S3==1){lcd.print("S3:Fill ");} else{lcd.print("S3:Empty");}

lcd.setCursor (10,2); if(S4==1){lcd.print("S4:Fill ");} else{lcd.print("S4:Empty");}

lcd.setCursor (0,3); if(S5==1){lcd.print("S5:Fill ");} else{lcd.print("S5:Empty");}

lcd.setCursor (10,3); if(S6==1){lcd.print("S6:Fill ");} else{lcd.print("S6:Empty");}

if(digitalRead (ir_enter) == 0 && flag1==0){ if(slot>0){flag1=1; if(flag2==0){myservo.write(180); slot = slot-1;} }else{ lcd.setCursor (0,0); lcd.print(" Sorry Parking Full ");
delay(1500); }
}

if(digitalRead (ir_back) == 0 && flag2==0){flag2=1; if(flag1==0){myservo.write(180); slot = slot+1;} }

if(flag1==1 && flag2==1){ delay (1000); myservo.write(90); flag1=0, flag2=0; }

delay(1); }

void Read_Sensor(){ S1=0, S2=0, S3=0, S4=0, S5=0, S6=0;

if(digitalRead(ir_car1) == 0){S1=1;} if(digitalRead(ir_car2) == 0){S2=1;} if(digitalRead(ir_car3) == 0){S3=1;} if(digitalRead(ir_car4) == 0){S4=1;} if(digitalRead(ir_car5) == 0){S5=1;} if(digitalRead(ir_car6) == 0){S6=1;}
}