#include <DHT.h>

// --- Pin Definitions based on your request ---
#define DHTPIN 4           // On ESP32, D2 is physically GPIO 4
#define DHTTYPE DHT22
#define POT_PIN 34         // Potentiometer (Current Sensor)
#define RELAY_PIN 25       // Relay Module
#define STATUS_LED 22      // The other LED

// --- Thresholds ---
float temp_limit = 45.0;    
int current_limit = 2500;   // Threshold for simulated motor current

DHT dht(DHTPIN, DHTTYPE);

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

  pinMode(RELAY_PIN, OUTPUT);
  pinMode(STATUS_LED, OUTPUT);

  // Initial State: Motor ON (Relay Active), Status LED OFF
  digitalWrite(RELAY_PIN, HIGH); 
  digitalWrite(STATUS_LED, LOW);
  
  Serial.println("System Monitoring Started...");
}

void loop() {
  float temp = dht.readTemperature();
  int potValue = analogRead(POT_PIN);

  if (isnan(temp)) {
    Serial.println("DHT Sensor Error - Check connection to D2 (GPIO 4)");
    return;
  }

  // Serial Monitor Debugging
  Serial.print("Temp: "); Serial.print(temp);
  Serial.print("°C | Current Value: "); Serial.println(potValue);

  // --- SAFETY LOGIC ---
  // If temp > 45C OR Potentiometer > 2500
  if (temp > temp_limit || potValue > current_limit) {
    digitalWrite(RELAY_PIN, LOW);   // STOP MOTOR (Relay OFF)
    digitalWrite(STATUS_LED, HIGH); // Turn on the Alert LED (Pin 22)
    Serial.println("!!! DANGER: SHUTTING DOWN MOTOR !!!");
  } 
  else {
    digitalWrite(RELAY_PIN, HIGH);  // MOTOR RUNNING
    digitalWrite(STATUS_LED, LOW);  // Alert LED OFF
  }

  delay(1000);
}