#include <DHT.h>

// --- Configuration ---
#define DHTPIN 15           // Pin where DHT22 is connected
#define DHTTYPE DHT22       // Sensor type
#define LED_PIN 2           // Red Alert LED
#define TEMP_THRESHOLD 35.0 // Your specified alert limit

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  pinMode(LED_PIN, OUTPUT);
  
  Serial.println("ICAN-V1: Local Hardware Test (Phase L0)");
  dht.begin();
}

void loop() {
  // Reading temperature and humidity
  float h = dht.readHumidity();
  float t = dht.readTemperature();

  // Check if any reads failed
  if (isnan(h) || isnan(t)) {
    Serial.println("Error: Could not read from DHT sensor!");
    return;
  }

  // Local Serial Output
  Serial.print("Current Stats -> Temp: ");
  Serial.print(t);
  Serial.print("°C | Humidity: ");
  Serial.print(h);
  Serial.println("%");

  // --- Alert Logic ---
  if (t > TEMP_THRESHOLD) {
    Serial.println("!!! WARNING: TEMPERATURE THRESHOLD EXCEEDED !!!");
    
    // Blink Pattern for Alarm
    digitalWrite(LED_PIN, HIGH);
    delay(100); 
    digitalWrite(LED_PIN, LOW);
    delay(100);
  } else {
    // Ensure LED is off when temp is safe
    digitalWrite(LED_PIN, LOW);
  }

  delay(1000); // 1-second sampling rate for local testing
}