/**
   ESP32 + DHT22 + LDR Example with LED indicators
   
   https://wokwi.com/arduino/projects/322410731508073042
*/

#include "DHTesp.h"

/* For DHT22 (white sensor) */
const int DHT_PIN = 15;
DHTesp dhtSensor;

/* For LDR (blue sensor) */
#define LIGHT_SENSOR_PIN 33 // ESP32 pin GPIO33 (ADC)

/* LED Output Pins */
const int DHT_LED_PIN = 22; // LED for DHT22 temperature indicator
const int LDR_LED_PIN = 21; // LED for LDR light indicator

/* For the thermistor */
const float BETA = 3950; // should match the Beta Coefficient of the thermistor
const int THERMISTOR_PIN = 4;
const int THERMISTOR_LED_PIN = 32;

/* Thresholds */
const float TEMP_THRESHOLD = 40; // Temperature threshold for DHT LED (in °C)
const int LIGHT_THRESHOLD = 800;   // Light threshold for LDR LED

void setup() {
  Serial.begin(115200);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);

  // Set up LED pins as outputs
  pinMode(DHT_LED_PIN, OUTPUT); // pin 34
  pinMode(LDR_LED_PIN, OUTPUT); // pin 21
  
  // For the thermistor
  analogReadResolution(10);
  pinMode(THERMISTOR_PIN, INPUT);
  pinMode(THERMISTOR_LED_PIN, OUTPUT);
}

void loop() {
  // --- Read temperature and humidity from DHT22 ---
  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  Serial.println("Temp: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");

  // --- Read the light sensor (LDR) --- prende sensor derecha arriba
  int analogValue = analogRead(LIGHT_SENSOR_PIN);
  Serial.print("Analog Value = ");
  Serial.print(analogValue); // Raw sensor value
  
  Serial.println("LDR LED: " + String(digitalRead(LDR_LED_PIN) ? "ON" : "OFF"));

  // --- Read thermistor --- prende sensor 
  int analogValue2 = analogRead(THERMISTOR_PIN);
  float celsius = 1 / (log(1 / (1023. / analogValue2 - 1)) / BETA + 1.0 / 298.15) - 273.15;
  Serial.print("Thermistor Temperature: ");
  Serial.print(celsius);
  Serial.println(" ℃");

  // Condition for thermistor LED

  Serial.println("---"); // Reading separator



  // Para led 1 
    // Control DHT LED based on temperature - prende sensor del centro
  if (data.temperature >= TEMP_THRESHOLD && data.humidity >= 50) { // Si mayor a 40 prende temperatura1 prende led 
    digitalWrite(DHT_LED_PIN, HIGH);
    Serial.println("DHT LED: ON (High Temperature)");
  } else {
    digitalWrite(DHT_LED_PIN, LOW);
    Serial.println("DHT LED: OFF (Normal Temperature)");
  }

  // para led 2 -- derecha arriba
    // Light classification and LED control
  if (analogValue < 40) {
    Serial.println(" => Dark");
    digitalWrite(LDR_LED_PIN, LOW);
  } else if (analogValue < LIGHT_THRESHOLD) { 
    Serial.println(" => Dim");
    digitalWrite(LDR_LED_PIN, LOW);
  } else if (analogValue < 2000) {
    Serial.println(" => Light");
    if (celsius < 5){
      digitalWrite(LDR_LED_PIN, HIGH); // Si menor a 2000 prende
    }
    
  } else if (analogValue < 3200) {
    Serial.println(" => Bright");
    digitalWrite(LDR_LED_PIN, HIGH); // Si menor a 3200 prende
  } else {
    Serial.println(" => Very bright"); // Si menor a 3200 prende
    digitalWrite(LDR_LED_PIN, HIGH);
  }

// para sensor 3 -- izquierda arriba
  if (celsius >= 35 && data.humidity >= 50) { // Si mayor a 35 temperatura2 prende
    digitalWrite(THERMISTOR_LED_PIN, HIGH);
    Serial.println("Thermistor LED: ON");
  } else {
    digitalWrite(THERMISTOR_LED_PIN, LOW);
    Serial.println("Thermistor LED: OFF");
  }

  delay(2000); // Wait 2 seconds before the next measurement
}