EV Charging Station Finder

System Overview

With EV adoption growing rapidly, finding available charging stations is crucial. This system provides real-time station status, reservations, and navigation.

Hardware Components

• ESP32: Main controller with WiFi
• Current Sensor (ACS712): Detect charging status
• Relay Module: Control power to charger
• RFID Reader: User authentication
• OLED Display: Status display

Charging Station Setup

// Station status monitoring
void checkChargingStatus() {
  float current = readCurrent();
  bool isOccupied = current > 2.0; // 2A threshold
  
  publishStatus({
    "station_id": "STATION_001",
    "occupied": isOccupied,
    "power_kw": current * 240 / 1000,
    "timestamp": millis()
  });
}

Cloud Backend

Component	Purpose
Firebase/Supabase	Real-time database
Google Maps API	Location & navigation
Stripe	Payment processing
Auth0	User authentication

Mobile App

Flutter/React Native app showing:

• Map with nearby stations
• Real-time availability (green/red markers)
• Charging speed (Level 1/2/3)
• Pricing information
• Reserve button

Payment Integration

// Stripe payment intent
const paymentIntent = await stripe.paymentIntents.create({
  amount: chargingCost * 100,
  currency: 'usd',
  payment_method_types: ['card'],
  metadata: { station_id, session_id }
});