ParKIFY - the Ultimate Parking Solutions

by arijitghosh2707 in Circuits > Arduino

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ParKIFY - the Ultimate Parking Solutions

Instructibles Cover Img.png

The main objective of this project is to simplify the parking system by connecting all the parking stations of any city or town via the internet and make the data accessible to the users. This helps the users to know the parking slot left in real time and also helps them to find the best closest parking station for them. This reduces the time consumption in finding the right parking station.

Also, this offers the users to check their amount that they have to give to the parking station.

Moreover, this technology does not need any extra cost to implement from the consumer end since nowadays almost all cars have FASTag. And this project also implements the same technology. Only the Government or the Companies need to spend initially to build the system to access the FASTag data, for vehicle identification and implement this on the Parking Stations.


The idea is to use the FASTag system that is RFID's to build a parking ecosystem for a town or city using the Arduino UNO R4 Wi-Fi board.


ParKIFY Project Diagram


For demonstration of the Project, I have built three parking stations which are connected to the Parking Station Center or Host via I2C Protocol. This will send the parking slot data as well as the vehicle which entered the parking or exit the parking. Which will further be portrayed onto the Web Dashboard (local web server).



Parking Station Working


Each parking consists of two IR sensors on either side of the gate. The RFID sensor records the tag data of each vehicle. The servo motor acts as a gate that rotates from 0 to 90 degrees and vice versa. Now when any vehicle approaches the IR sensor outside the gate, then the RFID sensor check the vehicle tag. Now if the parking is full, it will give an indication. And if the parking has one or more slots left then it will verify if the Vehicle is registered or not. If it is registered then it will open the gate and send the data to the UNO R4 Wi-Fi. Otherwise, it will give the unconfirmed signal.


ParKIFY Project Diagram Closed Gate

ParKIFY Project Diagram Opening Gate

ParKIFY Project Diagram Car Crossing


Supplies

  1. Arduino UNO R4 Wi-Fi - 1X
  2. Arduino Nano - 3X
  3. RC522 RFID - 3X
  4. MG995 Servo Motor - 3X
  5. IR Sensor - 6X
  6. Buzzer - 3X
  7. Red LED - 3X
  8. Green LED - 3X
  9. Universal PCB Prototype Board - 1X
  10. 400 Pin Breadboard - 3X
  11. Jumper Wires

Making the Indicator

Then I build the indicators using double sided PCB Prototype board, a buzzer, a red led and a green led for each of the three Indicators.


ParKIFY Components


These indicators basically indicate the status of the parking, indicates if any vehicle is scanned or not and lastly indicate if the vehicle is registered or not. I the parking is full both the red and green led will turn on and the buzzer will turn on for 1500 milli seconds. If a vehicle is scanned then only the green led and the buzzer will turn on for 500 milli seconds and if any vehicle is unregistered then the red led and the buzzer turn on and off for 5 times with an interval of 500 milli seconds.


Making the Parking Station Circuits

To build the Project first I had to build the parking stations separately. I made use of 400 pin breadboard to connect all the components. Later Connected the IR sensors with Male to Female jumpers.


After this the parking stations look like this without the indicators.


ParKIFY Pin Boards And Components


And like this with the indicators.


ParKIFY Pin Boards And Components

Circuit Diagram and Circuit Explanation

I have connected the IR sensors in digital pins 5 and 6 of Arduino Nano respectively. The buzzer is connected on digital pin 2 and the green led and the red led are connected in pins 3 and 4 respectively.

ParKIFY Project Circuit Diagram


Now all the parking stations are connected to the UNO R4 Wi-Fi via the SCL, SDL and the common ground pins.

ParKIFY Project Circuit Diagram


Marking the PlyWood

For the base, I took a plywood of dimensions 60cm x 40 cm. I marked the 20 cm and 40cm marks to roughly divide the ply into three equal sections. Then Positioned the three parking stations with hot glue.

ParKIFY Project Construction

ParKIFY Project Construction

Making the Parking Station & Road Track Design

Then I printed the road track design on A4 sheets and attached them using masking tape to make the project look classy. Then I used the wasted PCBs to put some heigh to the servo motors so that they don't touch the plywood. And finally connected the Arduino UNO R4 Wi-Fi board. And to improve the look of the project I have used some markers and highlighted the position pointers, parking slots and the parking stations.

ParKIFY Project Construction

ParKIFY Project Construction

Explanation of Parking Pointer

Now let me explain how the Parking Station Tracker works. I have made 15 pointers (numbered 1 to 15). So the project consists of three parking stations at position 5, 10 and 15 respectively. Now the tracking system works by finding the nearest parking station, which is first priority. And secondly it checks if the parking station is full or not and according to that data the tracking system provides data to the user (Web dashboard).

Here just to show the parking stations I have used green dots and for the rest of the pointers I have used red dots.

ParKIFY Project Construction

Complete Project

This is how I design everything for the demonstration after connecting the parking stations with the UNO R4 Wi-Fi.

ParKIFY Project Construction


Each of the Parking Station look like this.

ParKIFY Project ConstructionParKIFY Project Construction

ParKIFY Project Construction

Powering the Complete Project

The complete circuit is using 5v. Here I have used 5v/ 4A power supply to power the three parking stations. The USB Hub is distributing the power among the three Parking Stations. To power the servo motor I have used a 5v/ 2A power supply. And the UNO R4 Wi-Fi is powered by a 5v/ 1A power supply.

ParKIFY Project Construction

Parking Station Code Explanation

Firstly, initialized all the required libraries. Then declared all the global variables and the necessary pins.

The String array stores the vehicle tag details that I have scanned and registered.

Setup Function

  1. The setup function Initializes serial communication, configures pin modes, and attaches the servo to the pin.
void setup() {
Serial.begin(9600);

Wire.begin(PARKING_ADD_1); // Join I2C bus with address #8
Wire.onRequest(requestEvent); // Register event

SPI.begin();
mfrc522.PCD_Init();

pinMode(IR1, INPUT);
pinMode(IR2, INPUT);

pinMode(Buzzer, OUTPUT);
pinMode(Green_Led, OUTPUT);
pinMode(Red_Led, OUTPUT);

myservo.attach(7);
myservo.write(100);
}



Looping Function

  1. The loop function scans all the sensors and record data and call the other functions accordingly. Also, it evacuates the send variable that sends the data to the UNO R4 Wi-Fi.
void loop(){
send = (Slot+1)*100;
if(digitalRead (IR1) == LOW && flag1==0){
if(Slot>0){
flag1=1;
if(flag2==0){
String rfid = getRFIDValue();
if(rfid != ""){
Serial.println("RFID Value: " + rfid);
scan();
int index = findIndexOf(Tag, Listed, rfid);
if(index == -1)
unconfirmed();
else{
Vehicle = index;
myservo.write(0);
Slot = Slot-1;
send = (((Slot+1)*100)+((Vehicle+1)*10));
}
}
}
}
else{
Serial.println("Full");
full();
}
}

if(digitalRead (IR2) == LOW && flag2==0){
flag2=1;
if(flag1==0){
String rfid = getRFIDValue();
if(rfid != ""){
scan();
int index = findIndexOf(Tag, Listed, rfid);
Vehicle = index;
myservo.write(0);
Slot = Slot+1;
send = (((Slot+1)*100)+(Vehicle+1));
}
}
}
Serial.print("Send: ");
Serial.println(send);

if(flag1==1 && flag2==1){
delay (1000);
myservo.write(100);
flag1=0, flag2=0;
}

Serial.print("Slot Left: ");
Serial.println(Slot);
}


Supporting Functions

  1. The requestEvent function sends the data via I2C pins.
void requestEvent() {
if (send) {
Serial.print("Slot Left and Vehicle : ");
Serial.println(send);
Wire.write((byte*)&send, sizeof(send)); // Send the first integer
}


  1. The unconfirmed, scan and full functions are the indication functions are are called by the loop function accordingly.
void unconfirmed() {
for(int i=0; i<5; i++){
digitalWrite(Buzzer, HIGH);
digitalWrite(Red_Led, HIGH);
delay(500);
digitalWrite(Buzzer, LOW);
digitalWrite(Red_Led, LOW);
delay(500);
}

}


void scan() {
digitalWrite(Buzzer, HIGH);
digitalWrite(Green_Led, HIGH);
delay(500);
digitalWrite(Buzzer, LOW);
digitalWrite(Green_Led, LOW);

}

void full(){
digitalWrite(Buzzer, HIGH);
digitalWrite(Green_Led, HIGH);
digitalWrite(Red_Led, HIGH);
delay(1500);
digitalWrite(Buzzer, LOW);
digitalWrite(Green_Led, LOW);
digitalWrite(Red_Led, LOW);

}

  1. The getRFIDValue function receive the RFID data.
String getRFIDValue() {
if (!mfrc522.PICC_IsNewCardPresent()) {
return ""; // No new card present
}
if (!mfrc522.PICC_ReadCardSerial()) {
return ""; // Failed to read card serial
}

String rfidValue = "";
for (byte i = 0; i < mfrc522.uid.size; i++) {
rfidValue.concat(String(mfrc522.uid.uidByte[i], HEX));
}
rfidValue.toUpperCase();
mfrc522.PICC_HaltA(); // Stop reading

return rfidValue;
}


  1. The findIndexof function finds the vehicle tag number if registered and returns -1 is not registered.
int findIndexOf(String arr[], int size, String target) {
for (int i = 0; i < Listed; i++) {
if (arr[i] == target) {
return i;
}
}
return -1;
}


Parking Station Host Code Explanation

Firstly, initialized all the required libraries. Then added the Wi-Fi credentials declared all the global variables and the necessary pins.

Again, here the String array stores the vehicle tag details that I have scanned and registered.

The slot1, slot2 and slot3 stores the slot data, and the other variables are used for the calculation purposes except the VehicleInfo variable. The hour and minute variable are used to store the time in the arrays accordingly.


Setup Function

  1. The setup function Initializes serial communication and begins the built-in RTC.
void setup() {
Wire.begin();
Serial.begin(9600);
while (!Serial) {
delay(10);
}

RTC.begin();

RTCTime initialTime(17, Month::OCTOBER, 2024, 15, 35, 0, DayOfWeek::WEDNESDAY, SaveLight::SAVING_TIME_ACTIVE);

// Set the initial time if RTC is not running
if (!RTC.isRunning()) {
RTC.setTime(initialTime);
}

// Connect to WiFi
if (WiFi.begin(ssid, password) != WL_CONNECTED) {
Serial.println("Failed to connect to WiFi");
while (true);
}

Serial.print("Connected to WiFi. IP address: ");
Serial.println(WiFi.localIP());

// Start the server
server.begin();

}


Looping Function

  1. The loop part is establishing the Wi-Fi connection and then receiving data from each parking station. Then we build the basic web dashboard using HTML and added the three parking slot data, drop down menu, search bars and enter buttons. We also added my social media accounts on the top. This exchanges data to and from the UNO R4 Wi-Fi and the local web server.
void loop() {
// RTC
RTCTime currentTime;
RTC.getTime(currentTime);

//Print the current Date and Time in Serial monitor
Serial.print("Current time: ");
Serial.print(currentTime.getDayOfMonth());
Serial.print("/");
Serial.print(Month2int(currentTime.getMonth()));
Serial.print("/");
Serial.print(currentTime.getYear());
Serial.print(" - ");
Serial.print(currentTime.getHour());
Serial.print(":");
Serial.print(currentTime.getMinutes());
Serial.print(":");
Serial.println(currentTime.getSeconds());



//Receive data from each parking station
Wire.requestFrom(7, sizeof(slot1)); // Request the first parking station
if (Wire.available() >= sizeof(slot1)) {
Wire.readBytes((char*)&slot1, sizeof(slot1)); // Receive the ffirst parking station data
Serial.print("Slot left in Parking Station 1 : ");
//Separating data
int data = (slot1);
Serial.println(data);
{
if((data%10)!=0)
VehicleExit == (data%10)-1;
data = data/10;
if((data%10)!=0)
VehicleEntry == (data%10)-1;
slot1 = (data/10)-1;

if(VehicleExit!= -1){
ExitTimeHour[VehicleExit]= currentTime.getHour();
ExitTimeMinute[VehicleExit]= currentTime.getMinutes();
}
if(VehicleEntry!= -1){
EntryTimeHour[VehicleExit]= currentTime.getHour();
EntryTimeMinute[VehicleExit]= currentTime.getMinutes();
}
}
}
VehicleEntry = -1;
VehicleExit = -1;
delay(10);

Wire.requestFrom(8, sizeof(slot2)); // Request the second parking station
if (Wire.available() >= sizeof(slot2)) {
Wire.readBytes((char*)&slot2, sizeof(slot2)); // Receive the second parking station data
Serial.print("Slot left in Parking Station 2 : ");
//Separating data
int data = (slot2);
Serial.println(data);
{
data = data + 256;
if((data%10)!=0)
VehicleExit == (data%10)-1;
data = (data/10);
if((data%10)!=0)
VehicleEntry == (data%10)-1;
slot2 = (data/10)-1;

if(VehicleExit!= -1){
ExitTimeHour[VehicleExit]= currentTime.getHour();
ExitTimeMinute[VehicleExit]= currentTime.getMinutes();
}
if(VehicleEntry!= -1){
EntryTimeHour[VehicleExit]= currentTime.getHour();
EntryTimeMinute[VehicleExit]= currentTime.getMinutes();
}
}
}
VehicleEntry = -1;
VehicleExit = -1;
delay(10);

Wire.requestFrom(9, sizeof(slot3)); // Request the third parking station
if (Wire.available() >= sizeof(slot3)) {
Wire.readBytes((char*)&slot3, sizeof(slot3)); // Receive the third parking station data
Serial.print("Slot left in Parking Station 3 : ");
//Separating data
int data = (slot3);
Serial.println(data);
{
data = data + 256;
if((data%10)!=0)
VehicleExit == (data%10)-1;
data = data/10;
if((data%10)!=0)
VehicleEntry == (data%10)-1;
slot3 = (data/10)-1;

if(VehicleExit!= -1){
ExitTimeHour[VehicleExit]= currentTime.getHour();
ExitTimeMinute[VehicleExit]= currentTime.getMinutes();
}
if(VehicleEntry!= -1){
EntryTimeHour[VehicleExit]= currentTime.getHour();
EntryTimeMinute[VehicleExit]= currentTime.getMinutes();
}
}
}
VehicleEntry = -1;
VehicleExit = -1;
delay(10);

// Listen for incoming clients
WiFiClient client = server.available();
if (client) {
Serial.println("New client connected");
String currentLine = "";
while (client.connected()) {
if (client.available()) {
char c = client.read();
if (c == '\n') {
// If the line is blank, the HTTP request has ended
if (currentLine.length() == 0) {
// Send the HTTP response
client.println("HTTP/1.1 200 OK");
client.println("Content-type:text/html");
client.println();

// HTML content
client.println("<!DOCTYPE html><html>");
client.println("<head><title>ParKIFY</title><style>");
client.println("body { background-color: silver; font-family: Arial, sans-serif; text-align: center; }");
client.println("h1 { font-size: 72px; color: blue; }");
client.println(".box { width: 20vw; height: 20vw; display: inline-block; margin: 10px; border-radius: 15px; text-align: center; font-size: 24px; position: relative; }");
client.println(".orange-box { background-color: orange; }");
client.println(".green-box { background-color: green; color: yellow; }");
client.println(".cyan-box { background-color: cyan; }");
client.println(".box p.value { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); font-size: 48px; }");
client.println(".input-group { display: flex; justify-content: space-between; margin: 20px 0; }");
client.println("input[type='text'], select { width: 400px; height: 50px; font-size: 24px; font-weight: bold; }");
client.println("input[type='submit'] { width: 200px; height: 50px; font-size: 24px; font-weight: bold; }");
client.println(".top-right { position: absolute; top: 10px; right: 10px; text-align: left; }");
client.println("</style></head><body>");

client.println("<div class='top-right'>");
client.println("<a href='https://github.com/Ari-jit' style='color: black; font-size: 24px;'>github.com/Ari-jit</a><br>");
client.println("<a href='https://instagram.com/arijit_ghosh_acg' style='color: purple; font-size: 24px;'>instagram.com/arijit_ghosh_acg</a><br>");
client.println("<a href='https://linkedin.com/in/arijit-ghosh-82809522b' style='color: blue; font-size: 24px;'>linkedin.com/in/arijit-ghosh-82809522b</a>");
client.println("</div>");

client.println("<h1>ParKIFY</h1>");

client.println("<div class='box orange-box'><p>Slot left in</p><p>Parking Station 1</p><p class='value'>" + String(slot1) + "</p></div>");
client.println("<div class='box green-box'><p>Slot left in</p><p>Parking Station 2</p><p class='value'>" + String(slot2) + "</p></div>");
client.println("<div class='box cyan-box'><p>Slot left in</p><p>Parking Station 3</p><p class='value'>" + String(slot3) + "</p></div>");

client.println("<div class='input-group'>");
client.println("<form action='/updateInt' method='get'>");
client.println("<p style='font-size: 24px; font-weight: bold;'>Enter Position Point:</p>");
client.println("<select name='PositionPoint' onchange='updateDropdownValue(this.value)'>");
for(int i = 1; i <= 15; i++) {
client.println("<option value='" + String(i) + "'>" + String(i) + "</option>");
}
client.println("</select><br>");
client.println("<input type='submit' value='Enter'>");
client.println("<p id='intValue' style='font-size: 24px; font-weight: bold;'>" + String(ParkingPoint) + "</p>");
client.println("</form>");

client.println("<form action='/updateStr' method='get'>");
client.println("<p style='font-size: 24px; font-weight: bold;'>Enter Vehicle ID:</p>");
client.println("<input type='text' name='VehicleInfo'><br>");
client.println("<input type='submit' value='Enter'>");
client.println("<p id='strValue' style='font-size: 24px; font-weight: bold;'>" + String(AmountDue) + "</p>");
client.println("</form>");
client.println("</div>");

client.println("<script>");
client.println("function updateDropdownValue(value) { document.getElementById('intValue').innerText = value; }");
client.println("setInterval(function() { fetch('/data').then(response => response.json()).then(data => { document.getElementById('value1').innerText = data.slot1; document.getElementById('value2').innerText = data.slot2; document.getElementById('value3').innerText = data.slot3; document.getElementById('intValue').innerText = data.ParkingPoint; document.getElementById('strValue').innerText = data.AmountDue; }); }, 1000);");
client.println("</script>");
client.println("</body></html>");

// The HTTP response ends with another blank line
client.println();
break;
}
else { // If you got a newline, then clear currentLine
currentLine = "";
}
}
else if (c != '\r') { // If you got anything else but a carriage return character, append it to the currentLine
currentLine += c;

// Check if GET request and extract data
if (currentLine.indexOf("GET /updateInt?PositionPoint=") >= 0) {
int pos = currentLine.indexOf("PositionPoint=") + 14;
int endPos = currentLine.indexOf('&', pos);
if (endPos == -1) {
endPos = currentLine.length();
}
PositionPoint = currentLine.substring(pos, endPos).toInt();
Serial.println("PositionPoint received: " + String(PositionPoint));
//Finding Parking Point for the give point
parking_point(PositionPoint);
Serial.println("ParkingPoint calculated: " + String(ParkingPoint));
}

else if (currentLine.indexOf("GET /updateStr?VehicleInfo=") >= 0) {
int pos = currentLine.indexOf("VehicleInfo=") + 12;
int endPos = currentLine.indexOf(' ', pos);
if (endPos == -1) {
endPos = currentLine.length();
}
VehicleInfo = currentLine.substring(pos, endPos);
VehicleInfo.trim();
Serial.println("VehicleInfo received: " + VehicleInfo);
//Calculating amount for particular Vehicle ID
amount(VehicleInfo);
Serial.println("AmountDue calculated: " + String(AmountDue));
}
}
}
}
client.stop();
Serial.println("Client disconnected");
}
}



Supporting Functions

  1. We have the amount function that calculates the amount that a vehicle has to pay and the parking_point function that calculates the best parking station.
void amount(String vehicle){
int vehicleNo = findIndexOf(Tag, Listed, vehicle);
CalculateTimeDifference(EntryTimeHour[vehicleNo] , EntryTimeMinute[vehicleNo] , ExitTimeHour[vehicleNo] , ExitTimeMinute[vehicleNo]);
if(hour < 1){
if(minute < 30){
if(minute < 10 && minute !=0)
AmountDue = 10;
else
AmountDue = 0;
}
else{
AmountDue = ((minute-30)/ 10)*10 + 30;
}
}
else
AmountDue = hour*50;
}



  1. Then we have the parking_point function than checks and find the best suitable parking station nearby.
void parking_point(int point){
if(point <= 5){
if(slot1 !=0)
ParkingPoint = 1;
else if(slot2 !=0)
ParkingPoint = 2;
else if(slot3 !=0)
ParkingPoint = 3;
else
ParkingPoint = 0;

}
else if(point <= 10){
if((point - 5) < (10 - point)){
if(slot1 !=0)
ParkingPoint = 1;
else if(slot2 !=0)
ParkingPoint = 2;
else if(slot3 !=0)
ParkingPoint = 3;
else
ParkingPoint = 0;
}
else{
if(slot2 !=0)
ParkingPoint = 2;
else if(slot1 !=0)
ParkingPoint = 1;
else if(slot3 !=0)
ParkingPoint = 3;
else
ParkingPoint = 0;
}
}
else {
if((point - 10) < (15 - point)){
if(slot2 !=0)
ParkingPoint = 2;
else if(slot3 !=0)
ParkingPoint = 3;
else if(slot1 !=0)
ParkingPoint = 1;
else
ParkingPoint = 0;
}
else{
if(slot3 !=0)
ParkingPoint = 3;
else if(slot2 !=0)
ParkingPoint = 2;
else if(slot1 !=0)
ParkingPoint = 1;
else
ParkingPoint = 0;
}
}


  1. Lastly, we have the findIndexof function finds the vehicle tag number and the CalculateTimeDifference function that calculates the time difference.
int findIndexOf(String arr[], int size, String target) {
for (int i = 0; i < Listed; i++) {
if (arr[i] == target) {
return i;
}
}
return -1;
}



void CalculateTimeDifference(int initialHour, int initialMinute, int finalHour, int finalMinute) {
int initialTotalMinutes = initialHour * 60 + initialMinute;
int finalTotalMinutes = finalHour * 60 + finalMinute;

int diffMinutes = finalTotalMinutes - initialTotalMinutes;

hour = diffMinutes / 60;
minute = diffMinutes % 60;

Serial.print("Time difference: ");
Serial.print(hour);
Serial.print(" hours and ");
Serial.print(minute);
Serial.println(" minutes");
}


Complete Code

The Complete Parking Station Code


//ParKIFY
//Parking Station 1
//All necessary libraries
#include <SPI.h>
#include "MFRC522.h"
#include <Wire.h>
#include <Servo.h>

Servo myservo; //Creating servo object

#define RST_PIN 9
#define SS_PIN 10

// Define I2C Address
#define PARKING_ADD_1 7

//To check which vehicle entered or exit
int Vehicle = 0;

MFRC522 mfrc522(SS_PIN, RST_PIN);

int IR1 = 5;
int IR2 = 6;

int Buzzer = 2;
int Green_Led = 3;
int Red_Led = 4;

int Slot = 4; //Total number of parking Slots

//For checking the ir sensor data
int flag1 = 0;
int flag2 = 0;

//No. of registered vehicle
const int Listed = 6;
String Tag[Listed] = {"C3981E4","E3BDC0D9","13116AA4","39F29E4","A3B846E4","135F1BE4"}; // Change the RFID Data accordingly

int send = 0; // Data to send t0 host

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

Wire.begin(PARKING_ADD_1); // Join I2C bus with address #8
Wire.onRequest(requestEvent); // Register event

SPI.begin();
mfrc522.PCD_Init();

pinMode(IR1, INPUT);
pinMode(IR2, INPUT);

pinMode(Buzzer, OUTPUT);
pinMode(Green_Led, OUTPUT);
pinMode(Red_Led, OUTPUT);

myservo.attach(7);
myservo.write(100);
}

void loop(){
send = (Slot+1)*100;
if(digitalRead (IR1) == LOW && flag1==0){
if(Slot>0){
flag1=1;
if(flag2==0){
String rfid = getRFIDValue();
if(rfid != ""){
Serial.println("RFID Value: " + rfid);
scan();
int index = findIndexOf(Tag, Listed, rfid);
if(index == -1)
unconfirmed();
else{
Vehicle = index;
myservo.write(0);
Slot = Slot-1;
send = (((Slot+1)*100)+((Vehicle+1)*10));
}
}
}
}
else{
Serial.println("Full");
full();
}
}

if(digitalRead (IR2) == LOW && flag2==0){
flag2=1;
if(flag1==0){
String rfid = getRFIDValue();
if(rfid != ""){
scan();
int index = findIndexOf(Tag, Listed, rfid);
Vehicle = index;
myservo.write(0);
Slot = Slot+1;
send = (((Slot+1)*100)+(Vehicle+1));
}
}
}
Serial.print("Send: ");
Serial.println(send);

if(flag1==1 && flag2==1){
delay (1000);
myservo.write(100);
flag1=0, flag2=0;
}

Serial.print("Slot Left: ");
Serial.println(Slot);
}


void requestEvent() {
if (send) {
Serial.print("Slot Left and Vehicle : ");
Serial.println(send);
Wire.write((byte*)&send, sizeof(send)); // Send the first integer
}
}


void unconfirmed() {
for(int i=0; i<5; i++){
digitalWrite(Buzzer, HIGH);
digitalWrite(Red_Led, HIGH);
delay(500);
digitalWrite(Buzzer, LOW);
digitalWrite(Red_Led, LOW);
delay(500);
}

}


void scan() {
digitalWrite(Buzzer, HIGH);
digitalWrite(Green_Led, HIGH);
delay(500);
digitalWrite(Buzzer, LOW);
digitalWrite(Green_Led, LOW);

}

void full(){
digitalWrite(Buzzer, HIGH);
digitalWrite(Green_Led, HIGH);
digitalWrite(Red_Led, HIGH);
delay(1500);
digitalWrite(Buzzer, LOW);
digitalWrite(Green_Led, LOW);
digitalWrite(Red_Led, LOW);
}


String getRFIDValue() {
if (!mfrc522.PICC_IsNewCardPresent()) {
return ""; // No new card present
}
if (!mfrc522.PICC_ReadCardSerial()) {
return ""; // Failed to read card serial
}

String rfidValue = "";
for (byte i = 0; i < mfrc522.uid.size; i++) {
rfidValue.concat(String(mfrc522.uid.uidByte[i], HEX));
}
rfidValue.toUpperCase();
mfrc522.PICC_HaltA(); // Stop reading

return rfidValue;
}


int findIndexOf(String arr[], int size, String target) {
for (int i = 0; i < Listed; i++) {
if (arr[i] == target) {
return i;
}
}
return -1;
}



The complete Parking Station Host Code


#include "WiFiS3.h"
#include <WiFiClient.h>

#include <Wire.h>

#include <RTC.h>

// Replace with your network credentials
const char* ssid = "**********";
const char* password = "**********";

WiFiServer server(80); // Create a server that listens on port 80

//Slot left
int slot1 = 0;
int slot2 = 0;
int slot3 = 0;

//Vehicle entry and exit No.
int VehicleEntry = -1 ;
int VehicleExit = -1 ;

//To determine the best parking point
int PositionPoint = 0;
int ParkingPoint = 0;

//For calculating the amount
String VehicleInfo = "";
double AmountDue = 0.0;

//Time
int hour = 0;
int minute = 0;

//No. of registered vehicle
const int Listed = 6;
String Tag[Listed] = {"C3981E4","E3BDC0D9","13116AA4","39F29E4","A3B846E4","135F1BE4"}; //Change the RFID Data accordingly

//Data of entry and exit time of vehicles
int EntryTimeHour[Listed] = {0 , 0 , 0 , 0, 0, 0};
int EntryTimeMinute[Listed] = {0 , 0 , 0 , 0, 0, 0};
int ExitTimeHour[Listed] = {0 , 0 , 0 , 0, 0, 0};
int ExitTimeMinute[Listed] = {0 , 0 , 0 , 0, 0, 0};


void setup() {
Wire.begin();
Serial.begin(9600);
while (!Serial) {
delay(10);
}

RTC.begin();

RTCTime initialTime(17, Month::OCTOBER, 2024, 15, 35, 0, DayOfWeek::WEDNESDAY, SaveLight::SAVING_TIME_ACTIVE);

// Set the initial time if RTC is not running
if (!RTC.isRunning()) {
RTC.setTime(initialTime);
}

// Connect to WiFi
if (WiFi.begin(ssid, password) != WL_CONNECTED) {
Serial.println("Failed to connect to WiFi");
while (true);
}

Serial.print("Connected to WiFi. IP address: ");
Serial.println(WiFi.localIP());

// Start the server
server.begin();
}

void loop() {
// RTC
RTCTime currentTime;
RTC.getTime(currentTime);

//Print the current Date and Time in Serial monitor
Serial.print("Current time: ");
Serial.print(currentTime.getDayOfMonth());
Serial.print("/");
Serial.print(Month2int(currentTime.getMonth()));
Serial.print("/");
Serial.print(currentTime.getYear());
Serial.print(" - ");
Serial.print(currentTime.getHour());
Serial.print(":");
Serial.print(currentTime.getMinutes());
Serial.print(":");
Serial.println(currentTime.getSeconds());



//Receive data from each parking station
Wire.requestFrom(7, sizeof(slot1)); // Request the first parking station
if (Wire.available() >= sizeof(slot1)) {
Wire.readBytes((char*)&slot1, sizeof(slot1)); // Receive the ffirst parking station data
Serial.print("Slot left in Parking Station 1 : ");
//Separating data
int data = (slot1);
Serial.println(data);
{
if((data%10)!=0)
VehicleExit == (data%10)-1;
data = data/10;
if((data%10)!=0)
VehicleEntry == (data%10)-1;
slot1 = (data/10)-1;

if(VehicleExit!= -1){
ExitTimeHour[VehicleExit]= currentTime.getHour();
ExitTimeMinute[VehicleExit]= currentTime.getMinutes();
}
if(VehicleEntry!= -1){
EntryTimeHour[VehicleExit]= currentTime.getHour();
EntryTimeMinute[VehicleExit]= currentTime.getMinutes();
}
}
}
VehicleEntry = -1;
VehicleExit = -1;
delay(10);

Wire.requestFrom(8, sizeof(slot2)); // Request the second parking station
if (Wire.available() >= sizeof(slot2)) {
Wire.readBytes((char*)&slot2, sizeof(slot2)); // Receive the second parking station data
Serial.print("Slot left in Parking Station 2 : ");
//Separating data
int data = (slot2);
Serial.println(data);
{
data = data + 256;
if((data%10)!=0)
VehicleExit == (data%10)-1;
data = (data/10);
if((data%10)!=0)
VehicleEntry == (data%10)-1;
slot2 = (data/10)-1;

if(VehicleExit!= -1){
ExitTimeHour[VehicleExit]= currentTime.getHour();
ExitTimeMinute[VehicleExit]= currentTime.getMinutes();
}
if(VehicleEntry!= -1){
EntryTimeHour[VehicleExit]= currentTime.getHour();
EntryTimeMinute[VehicleExit]= currentTime.getMinutes();
}
}
}
VehicleEntry = -1;
VehicleExit = -1;
delay(10);

Wire.requestFrom(9, sizeof(slot3)); // Request the third parking station
if (Wire.available() >= sizeof(slot3)) {
Wire.readBytes((char*)&slot3, sizeof(slot3)); // Receive the third parking station data
Serial.print("Slot left in Parking Station 3 : ");
//Separating data
int data = (slot3);
Serial.println(data);
{
data = data + 256;
if((data%10)!=0)
VehicleExit == (data%10)-1;
data = data/10;
if((data%10)!=0)
VehicleEntry == (data%10)-1;
slot3 = (data/10)-1;

if(VehicleExit!= -1){
ExitTimeHour[VehicleExit]= currentTime.getHour();
ExitTimeMinute[VehicleExit]= currentTime.getMinutes();
}
if(VehicleEntry!= -1){
EntryTimeHour[VehicleExit]= currentTime.getHour();
EntryTimeMinute[VehicleExit]= currentTime.getMinutes();
}
}
}
VehicleEntry = -1;
VehicleExit = -1;
delay(10);

// Listen for incoming clients
WiFiClient client = server.available();
if (client) {
Serial.println("New client connected");
String currentLine = "";
while (client.connected()) {
if (client.available()) {
char c = client.read();
if (c == '\n') {
// If the line is blank, the HTTP request has ended
if (currentLine.length() == 0) {
// Send the HTTP response
client.println("HTTP/1.1 200 OK");
client.println("Content-type:text/html");
client.println();

// HTML content
client.println("<!DOCTYPE html><html>");
client.println("<head><title>ParKIFY</title><style>");
client.println("body { background-color: silver; font-family: Arial, sans-serif; text-align: center; }");
client.println("h1 { font-size: 72px; color: blue; }");
client.println(".box { width: 20vw; height: 20vw; display: inline-block; margin: 10px; border-radius: 15px; text-align: center; font-size: 24px; position: relative; }");
client.println(".orange-box { background-color: orange; }");
client.println(".green-box { background-color: green; color: yellow; }");
client.println(".cyan-box { background-color: cyan; }");
client.println(".box p.value { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); font-size: 48px; }");
client.println(".input-group { display: flex; justify-content: space-between; margin: 20px 0; }");
client.println("input[type='text'], select { width: 400px; height: 50px; font-size: 24px; font-weight: bold; }");
client.println("input[type='submit'] { width: 200px; height: 50px; font-size: 24px; font-weight: bold; }");
client.println(".top-right { position: absolute; top: 10px; right: 10px; text-align: left; }");
client.println("</style></head><body>");

client.println("<div class='top-right'>");
client.println("<a href='https://github.com/Ari-jit' style='color: black; font-size: 24px;'>github.com/Ari-jit</a><br>");
client.println("<a href='https://instagram.com/arijit_ghosh_acg' style='color: purple; font-size: 24px;'>instagram.com/arijit_ghosh_acg</a><br>");
client.println("<a href='https://linkedin.com/in/arijit-ghosh-82809522b' style='color: blue; font-size: 24px;'>linkedin.com/in/arijit-ghosh-82809522b</a>");
client.println("</div>");

client.println("<h1>ParKIFY</h1>");

client.println("<div class='box orange-box'><p>Slot left in</p><p>Parking Station 1</p><p class='value'>" + String(slot1) + "</p></div>");
client.println("<div class='box green-box'><p>Slot left in</p><p>Parking Station 2</p><p class='value'>" + String(slot2) + "</p></div>");
client.println("<div class='box cyan-box'><p>Slot left in</p><p>Parking Station 3</p><p class='value'>" + String(slot3) + "</p></div>");

client.println("<div class='input-group'>");
client.println("<form action='/updateInt' method='get'>");
client.println("<p style='font-size: 24px; font-weight: bold;'>Enter Position Point:</p>");
client.println("<select name='PositionPoint' onchange='updateDropdownValue(this.value)'>");
for(int i = 1; i <= 15; i++) {
client.println("<option value='" + String(i) + "'>" + String(i) + "</option>");
}
client.println("</select><br>");
client.println("<input type='submit' value='Enter'>");
client.println("<p id='intValue' style='font-size: 24px; font-weight: bold;'>" + String(ParkingPoint) + "</p>");
client.println("</form>");

client.println("<form action='/updateStr' method='get'>");
client.println("<p style='font-size: 24px; font-weight: bold;'>Enter Vehicle ID:</p>");
client.println("<input type='text' name='VehicleInfo'><br>");
client.println("<input type='submit' value='Enter'>");
client.println("<p id='strValue' style='font-size: 24px; font-weight: bold;'>" + String(AmountDue) + "</p>");
client.println("</form>");
client.println("</div>");

client.println("<script>");
client.println("function updateDropdownValue(value) { document.getElementById('intValue').innerText = value; }");
client.println("setInterval(function() { fetch('/data').then(response => response.json()).then(data => { document.getElementById('value1').innerText = data.slot1; document.getElementById('value2').innerText = data.slot2; document.getElementById('value3').innerText = data.slot3; document.getElementById('intValue').innerText = data.ParkingPoint; document.getElementById('strValue').innerText = data.AmountDue; }); }, 1000);");
client.println("</script>");
client.println("</body></html>");

// The HTTP response ends with another blank line
client.println();
break;
}
else { // If you got a newline, then clear currentLine
currentLine = "";
}
}
else if (c != '\r') { // If you got anything else but a carriage return character, append it to the currentLine
currentLine += c;

// Check if GET request and extract data
if (currentLine.indexOf("GET /updateInt?PositionPoint=") >= 0) {
int pos = currentLine.indexOf("PositionPoint=") + 14;
int endPos = currentLine.indexOf('&', pos);
if (endPos == -1) {
endPos = currentLine.length();
}
PositionPoint = currentLine.substring(pos, endPos).toInt();
Serial.println("PositionPoint received: " + String(PositionPoint));
//Finding Parking Point for the give point
parking_point(PositionPoint);
Serial.println("ParkingPoint calculated: " + String(ParkingPoint));
}

else if (currentLine.indexOf("GET /updateStr?VehicleInfo=") >= 0) {
int pos = currentLine.indexOf("VehicleInfo=") + 12;
int endPos = currentLine.indexOf(' ', pos);
if (endPos == -1) {
endPos = currentLine.length();
}
VehicleInfo = currentLine.substring(pos, endPos);
VehicleInfo.trim();
Serial.println("VehicleInfo received: " + VehicleInfo);
//Calculating amount for particular Vehicle ID
amount(VehicleInfo);
Serial.println("AmountDue calculated: " + String(AmountDue));
}
}
}
}
client.stop();
Serial.println("Client disconnected");
}
}


/*
If time grater than 1 hour then per hour Rs. 50.
If time less than 1 hour but grater than half an hour then Rs. 10 added every ten minutes excluding the Rs. 30. And total will be calculated.
If time less than half an hour then Rs. 10 is added every ten minutes
If time less than 10 minutes then Rs. 10 is added.
*/
void amount(String vehicle){
int vehicleNo = findIndexOf(Tag, Listed, vehicle);
CalculateTimeDifference(EntryTimeHour[vehicleNo] , EntryTimeMinute[vehicleNo] , ExitTimeHour[vehicleNo] , ExitTimeMinute[vehicleNo]);
if(hour < 1){
if(minute < 30){
if(minute < 10 && minute !=0)
AmountDue = 10;
else
AmountDue = 0;
}
else{
AmountDue = ((minute-30)/ 10)*10 + 30;
}
}
else
AmountDue = hour*50;
}

//Fing the closest parking station and if it is full it suggests the next closed one
void parking_point(int point){
if(point <= 5){
if(slot1 !=0)
ParkingPoint = 1;
else if(slot2 !=0)
ParkingPoint = 2;
else if(slot3 !=0)
ParkingPoint = 3;
else
ParkingPoint = 0;

}
else if(point <= 10){
if((point - 5) < (10 - point)){
if(slot1 !=0)
ParkingPoint = 1;
else if(slot2 !=0)
ParkingPoint = 2;
else if(slot3 !=0)
ParkingPoint = 3;
else
ParkingPoint = 0;
}
else{
if(slot2 !=0)
ParkingPoint = 2;
else if(slot1 !=0)
ParkingPoint = 1;
else if(slot3 !=0)
ParkingPoint = 3;
else
ParkingPoint = 0;
}
}
else {
if((point - 10) < (15 - point)){
if(slot2 !=0)
ParkingPoint = 2;
else if(slot3 !=0)
ParkingPoint = 3;
else if(slot1 !=0)
ParkingPoint = 1;
else
ParkingPoint = 0;
}
else{
if(slot3 !=0)
ParkingPoint = 3;
else if(slot2 !=0)
ParkingPoint = 2;
else if(slot1 !=0)
ParkingPoint = 1;
else
ParkingPoint = 0;
}
}

int findIndexOf(String arr[], int size, String target) {
for (int i = 0; i < Listed; i++) {
if (arr[i] == target) {
return i;
}
}
return -1;
}

void CalculateTimeDifference(int initialHour, int initialMinute, int finalHour, int finalMinute) {
int initialTotalMinutes = initialHour * 60 + initialMinute;
int finalTotalMinutes = finalHour * 60 + finalMinute;

int diffMinutes = finalTotalMinutes - initialTotalMinutes;

hour = diffMinutes / 60;
minute = diffMinutes % 60;

Serial.print("Time difference: ");
Serial.print(hour);
Serial.print(" hours and ");
Serial.print(minute);
Serial.println(" minutes");
}


Finding the Local Web Server Ip Address

After uploading the code to each of the Arduino Nano's the Parking Stations are ready.

Then I uploaded the code to the UNO R4 Wi-Fi board. Then I reset the board and waited for the system to connect to the network. After some time, it connected successfully and I get the Local IP address in the serial monitor. Copy that can paste in the web browser. The Web Dashboard opens.

ParKIFY Project Code

Web Dashboard

That's how the Web dashboard look like.

ParKIFY Web Dashboard

Complete Project

Note


I am not using any car model to demonstrate the project. I am just using the cards that is the vehicle tag to show.


ParKIFY Project Demonstration

Checking the Amount Feature

To check the Amount feature, I parked a car in one of the parking station for more than one minute first. Then checked the amount in the web dashboard.


ParKIFY Project Demonstration


Check Amount by entering the vehicle tag details.

ParKIFY Web Dashboard

Parking Station Demonstration

Vehicle enters the Parking Station (the green led and the buzzer will turn on for 500 milli seconds).

ParKIFY Project DemonstrationParking Station is full (both the red and green led will turn on and the buzzer will turn on for 1500 milli seconds).

ParKIFY Project DemonstrationVehicle is not registered (the red led and the buzzer turn on and off for 5 times with an interval of 500 milli seconds).

ParKIFY Project DemonstrationSome more pictures for better understanding.

ParKIFY Project Demonstration

ParKIFY Project Demonstration

Visit my Github Repository for all the code and circuit diagrams.


Also for better understanding of the project do watch the video.