AI Smart Parking System with Empty Slot Detection and Mobile App

AI Smart Parking System with Empty Slot Detection and Mobile App Agentic IoT using ESP32 + AI + n8n + Telegram Voice Alerts + Google Sheets + ThingSpeak

AI Smart Parking System with Empty Slot Detection and Mobile App Agentic IoT using ESP32 + AI + n8n + Telegram Voice Alerts + Google Sheets + ThingSpeak 1. Project Overview This project is an AI-powered Smart Parking Management System that detects empty parking slots using sensors connected to an ESP32. The system uploads parking data to the cloud, automates workflows using n8n, sends Telegram notifications with voice alerts, stores logs in Google Sheets, and visualizes data on ThingSpeak dashboards. The system can: Detect occupied/empty parking slots Display available parking spaces on web/mobile dashboard Send instant Telegram alerts Generate AI-based parking predictions Store historical parking data Trigger voice notifications Predict power usage and parking trends Work as an Agentic IoT automation system 2. System Architecture Ultrasonic/IR Sensors ↓ ESP32 ↓ WiFi ThingSpeak Cloud ↓ n8n ↙ ↓ ↘ Telegram AI Logic Google Sheets Alerts Analysis Data Logging 3. Components List Component Quantity Purpose ESP32 Dev Board 1 Main controller IR Sensors / Ultrasonic Sensors 4 Vehicle detection OLED Display (Optional) 1 Display slot status Buzzer 1 Local alerts LEDs 4 Slot indication Breadboard 1 Connections Jumper Wires Several Wiring 5V Power Supply 1 Power source WiFi Router 1 Internet connectivity 4. Parking Slot Logic Sensor State Slot Status HIGH Empty LOW Occupied 5. Circuit Schematic Diagram IR Sensor 1 → GPIO 13 IR Sensor 2 → GPIO 12 IR Sensor 3 → GPIO 14 IR Sensor 4 → GPIO 27 LED1 → GPIO 18 LED2 → GPIO 19 LED3 → GPIO 21 LED4 → GPIO 22 Buzzer → GPIO 23 VCC → 5V GND → GND 6. Flowchart START ↓ Initialize ESP32 ↓ Connect WiFi ↓ Read Sensors ↓ Check Empty Slots ↓ Upload Data to ThingSpeak ↓ Trigger n8n Webhook ↓ Send Telegram Alert ↓ Store Data in Google Sheets ↓ Run AI Prediction ↓ Repeat 7. ESP32 Source Code (Arduino IDE) #include #include const char* ssid = "YOUR_WIFI_NAME"; const char* password = "YOUR_WIFI_PASSWORD"; String apiKey = "THINGSPEAK_API_KEY"; #define S1 13 #define S2 12 #define S3 14 #define S4 27 void setup() { Serial.begin(115200); pinMode(S1, INPUT); pinMode(S2, INPUT); pinMode(S3, INPUT); pinMode(S4, INPUT); WiFi.begin(ssid, password); while(WiFi.status() != WL_CONNECTED) { delay(1000); Serial.println("Connecting..."); } Serial.println("WiFi Connected"); } void loop() { int slot1 = digitalRead(S1); int slot2 = digitalRead(S2); int slot3 = digitalRead(S3); int slot4 = digitalRead(S4); int emptySlots = 0; if(slot1 == HIGH) emptySlots++; if(slot2 == HIGH) emptySlots++; if(slot3 == HIGH) emptySlots++; if(slot4 == HIGH) emptySlots++; if(WiFi.status() == WL_CONNECTED) { HTTPClient http; String url = "http://api.thingspeak.com/update?api_key=" + apiKey + "&field1=" + String(slot1) + "&field2=" + String(slot2) + "&field3=" + String(slot3) + "&field4=" + String(slot4) + "&field5=" + String(emptySlots); http.begin(url); int httpCode = http.GET(); Serial.println(httpCode); http.end(); } delay(15000); } 8. ThingSpeak Cloud Dashboard Setup Create Channel Create account in ThingSpeak Create new channel Add fields: Field Description Field1 Slot1 Field2 Slot2 Field3 Slot3 Field4 Slot4 Field5 Empty Slots Copy Write API Key Paste into ESP32 code 9. n8n Automation Workflow Features Receives data from ThingSpeak Sends Telegram notifications Converts alerts into voice messages Updates Google Sheets Performs AI prediction logic Install n8n n8n Official Website 10. n8n Workflow JSON { "nodes": [ { "name": "Webhook", "type": "n8n-nodes-base.webhook", "parameters": { "path": "parking-data", "httpMethod": "POST" } }, { "name": "Telegram", "type": "n8n-nodes-base.telegram", "parameters": { "text": "Parking Slot Updated" } }, { "name": "Google Sheets", "type": "n8n-nodes-base.googleSheets", "parameters": { "operation": "append" } } ] } 11. Telegram Bot Setup Create Bot Open Telegram Search for Telegram Search: @BotFather Create bot using: /newbot Copy BOT TOKEN Get Chat ID Send message to your bot then open: https://api.telegram.org/bot/getUpdates 12. Telegram Voice Notification Automation Workflow ESP32 → n8n → Text-to-Speech → Telegram Voice Message Example Voice Alert "Attention! Only two parking slots are available." TTS Services You can use: Google Text-to-Speech ElevenLabs 13. Google Sheets Integration Setup Steps Create sheet in Google Sheets Columns: | Timestamp | Slot1 | Slot2 | Slot3 | Slot4 | Empty Slots | Connect Google account in n8n Use Append Row operation 14. AI Power Consumption Prediction Logic The AI logic predicts: Peak parking usage Low-usage hours ESP32 power consumption trends Expected occupancy patterns Prediction Formula Using moving average: P avg ​ = n P 1 ​ +P 2 ​ +P 3 ​ +⋯+P n ​ ​ Where: P avg ​ = average power P n ​ = sensor power readings Occupancy Prediction O t ​ = n ∑ i=1 n ​ S i ​ ​ Where: O t ​ = predicted occupancy S i ​ = slot occupancy values 15. AI Agent Features The Agentic IoT system can: Analyze parking availability Automatically notify users Predict congestion Trigger maintenance alerts Generate smart reports Recommend optimal parking usage 16. Web Dashboard Features Dashboard Displays Total parking slots Empty slots Occupied slots Real-time sensor status Historical graphs AI predictions 17. Mobile App Features You can create mobile app using: MIT App Inventor Flutter Blynk IoT Platform 18. Advanced Enhancements Additions AI Camera Detection Use: ESP32-CAM YOLO Object Detection License Plate Recognition Use: OCR OpenCV Cloud Database Use: Firebase MongoDB GPS Parking Navigation Guide drivers to empty slots QR Ticket System Automatic billing system 19. Deployment Guide Hardware Deployment Install sensors in parking area Use waterproof casing Ensure stable WiFi coverage Software Deployment Flash ESP32 code Configure ThingSpeak API Deploy n8n workflow Connect Telegram bot Test notifications 20. Testing Procedure Test Expected Result Vehicle enters Slot occupied Vehicle exits Slot empty Empty slot count Updates live Telegram alert Received instantly Google Sheet Data appended ThingSpeak graph Updated 21. Real-Time Notification Examples Telegram Text Alert 🚗 Parking Update: Available Slots: 2 Occupied Slots: 2 Voice Alert "Parking area almost full. Only one slot remaining." 22. Advantages of This Project Smart city ready Low-cost implementation Real-time monitoring AI-driven automation Scalable architecture Cloud enabled Mobile accessible 23. Applications Shopping malls Smart cities Colleges Hospitals Airports Offices Residential parking 24. Future Scope Edge AI deployment Solar-powered ESP32 Machine learning analytics Multi-floor parking management Face recognition entry Autonomous vehicle integration 25. Conclusion This AI Smart Parking System combines: ESP32 IoT hardware AI analytics Cloud dashboards n8n automation Telegram alerts Voice notifications Google Sheets logging to create a complete smart parking ecosystem suitable for modern smart-city applications.