/*ESP32: The main microcontroller.
3 IR Sensors: For detecting whether parking spots are occupied.
Thingzmate: Cloud platform for data visualization and control.
Libraries Required:
WiFi.h for Wi-Fi connectivity.
HTTPClient.h for sending data to Thingzmate.
Wiring:
IR Sensors: Connect each IR sensor’s output to a different GPIO pin on the ESP32.
IR Sensor 1: GPIO 13
IR Sensor 2: GPIO 12
IR Sensor 3: GPIO 14*/
#include <WiFi.h>
#include <HTTPClient.h>

#define WIFI_SSID "Sridhar"
#define WIFI_PASSWORD "sridhar2005"

const char *serverUrl = "https://console.thingzmate.com/api/v1/device-types/23304479/devices/23304479/uplink"; // Replace with your server endpoint
String AuthorizationToken = "Bearer e96180a7dd3ed8dfe8692b6cfe5a2aa5";

// Define IR sensor pins and LED pins
#define IR1_PIN 34
#define IR2_PIN 35
#define IR3_PIN 32

#define LED1_PIN 16
#define LED2_PIN 17
#define LED3_PIN 18

void setup() {
  Serial.begin(115200);

  // Set IR sensor pins as inputs
  pinMode(IR1_PIN, INPUT);
  pinMode(IR2_PIN, INPUT);
  pinMode(IR3_PIN, INPUT);

  // Set LED pins as outputs
  pinMode(LED1_PIN, OUTPUT);
  pinMode(LED2_PIN, OUTPUT);
  pinMode(LED3_PIN, OUTPUT);

  delay(4000); // Delay to let serial settle

  // Connect to WiFi
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
  }
  Serial.println("Connected to WiFi");
}

void loop() {
  // Read IR sensor values
  int ir1Value = digitalRead(IR1_PIN);
  int ir2Value = digitalRead(IR2_PIN);
  int ir3Value = digitalRead(IR3_PIN);

  // Control LEDs based on IR sensor values
  digitalWrite(LED1_PIN, ir1Value ? LOW : HIGH); // LED ON if no vehicle (LOW means unoccupied)
  digitalWrite(LED2_PIN, ir2Value ? LOW : HIGH); // LED ON if no vehicle (LOW means unoccupied)
  digitalWrite(LED3_PIN, ir3Value ? LOW : HIGH); // LED ON if no vehicle (LOW means unoccupied)

  // Prepare HTTP request
  HTTPClient http;
  http.begin(serverUrl);
  http.addHeader("Content-Type", "application/json");
  http.addHeader("Authorization", AuthorizationToken);

  // Create JSON payload
  String payload = "{\"ir1_value\":" + String(ir1Value) +
                   ",\"ir2_value\":" + String(ir2Value) +
                   ",\"ir3_value\":" + String(ir3Value) + "}";

  // Send POST request
  int httpResponseCode = http.POST(payload);

  if (httpResponseCode > 0) {
    String response = http.getString();
    Serial.println("HTTP Response code: " + String(httpResponseCode));
    Serial.println(response);
  } else {
    Serial.print("Error code: ");
    Serial.println(httpResponseCode);
  }

  http.end(); // Free resources
  delay(10000); // Wait for 10 seconds before sending the next request
}