// Pin definitions
#define DOOR_SENSOR_PIN 2 // Hall effect sensor for door
#define PIR_SENSOR_PIN 3  // PIR sensor for motion
#define LIGHT1_PIN 4      // Relay for Light 1
#define LIGHT2_PIN 5      // Relay for Light 2
#define LIGHT3_PIN 6      // Relay for Light 3
#define LIGHT4_PIN 7      // Relay for Light 4
#define FAN_CONTROL_PIN 9 // PWM pin for fan (PC817)
#define SOCKET_PIN 8      // Relay for power socket
#define TOUCH1_PIN A0     // Touch sensor for Light 1
#define TOUCH2_PIN A1     // Touch sensor for Light 2
#define TOUCH3_PIN A2     // Touch sensor for Light 3
#define TOUCH4_PIN A3     // Touch sensor for Light 4
#define FAN_TOUCH_PIN A4  // Touch sensor for fan control
#define SOCKET_TOUCH_PIN A5 // Touch sensor for socket

// Variables
unsigned long doorCloseTime = 0;
bool doorOpen = false;
int fanSpeed = 0; // 0=Off, 1=Speed1, ..., 5=Speed5

void setup() {
  // Input pins
    pinMode(DOOR_SENSOR_PIN, INPUT);
      pinMode(PIR_SENSOR_PIN, INPUT);
        pinMode(TOUCH1_PIN, INPUT);
          pinMode(TOUCH2_PIN, INPUT);
            pinMode(TOUCH3_PIN, INPUT);
              pinMode(TOUCH4_PIN, INPUT);
                pinMode(FAN_TOUCH_PIN, INPUT);
                  pinMode(SOCKET_TOUCH_PIN, INPUT);

                    // Output pins
                      pinMode(LIGHT1_PIN, OUTPUT);
                        pinMode(LIGHT2_PIN, OUTPUT);
                          pinMode(LIGHT3_PIN, OUTPUT);
                            pinMode(LIGHT4_PIN, OUTPUT);
                              pinMode(FAN_CONTROL_PIN, OUTPUT);
                                pinMode(SOCKET_PIN, OUTPUT);

                                  // Initialize outputs
                                    digitalWrite(LIGHT1_PIN, LOW);
                                      digitalWrite(LIGHT2_PIN, LOW);
                                        digitalWrite(LIGHT3_PIN, LOW);
                                          digitalWrite(LIGHT4_PIN, LOW);
                                            digitalWrite(SOCKET_PIN, LOW);
                                              analogWrite(FAN_CONTROL_PIN, 0); // Fan off
                                              }

                                              void loop() {
                                                // Door sensor logic
                                                  if (digitalRead(DOOR_SENSOR_PIN) == HIGH) {
                                                      doorOpen = true;
                                                          turnOnAllLights();
                                                            } else {
                                                                if (doorOpen) {
                                                                      doorCloseTime = millis();
                                                                            doorOpen = false;
                                                                                }
                                                                                  }

                                                                                    // Check for door closed and no motion
                                                                                      if (!doorOpen && millis() - doorCloseTime > 120000) { // 2 minutes
                                                                                          if (digitalRead(PIR_SENSOR_PIN) == LOW) {
                                                                                                turnOffAllLightsAndFan();
                                                                                                    }
                                                                                                      }

                                                                                                        // Touch sensor logic for manual controls
                                                                                                          if (digitalRead(TOUCH1_PIN) == HIGH) toggleLight(LIGHT1_PIN);
                                                                                                            if (digitalRead(TOUCH2_PIN) == HIGH) toggleLight(LIGHT2_PIN);
                                                                                                              if (digitalRead(TOUCH3_PIN) == HIGH) toggleLight(LIGHT3_PIN);
                                                                                                                if (digitalRead(TOUCH4_PIN) == HIGH) toggleLight(LIGHT4_PIN);

                                                                                                                  if (digitalRead(FAN_TOUCH_PIN) == HIGH) controlFan();
                                                                                                                    if (digitalRead(SOCKET_TOUCH_PIN) == HIGH) toggleLight(SOCKET_PIN);
                                                                                                                    }

                                                                                                                    // Function to turn on all lights
                                                                                                                    void turnOnAllLights() {
                                                                                                                      digitalWrite(LIGHT1_PIN, HIGH);
                                                                                                                        digitalWrite(LIGHT2_PIN, HIGH);
                                                                                                                          digitalWrite(LIGHT3_PIN, HIGH);
                                                                                                                            digitalWrite(LIGHT4_PIN, HIGH);
                                                                                                                            }

                                                                                                                            // Function to turn off all lights and fan
                                                                                                                            void turnOffAllLightsAndFan() {
                                                                                                                              digitalWrite(LIGHT1_PIN, LOW);
                                                                                                                                digitalWrite(LIGHT2_PIN, LOW);
                                                                                                                                  digitalWrite(LIGHT3_PIN, LOW);
                                                                                                                                    digitalWrite(LIGHT4_PIN, LOW);
                                                                                                                                      analogWrite(FAN_CONTROL_PIN, 0); // Fan off
                                                                                                                                      }

                                                                                                                                      // Function to toggle light or socket state
                                                                                                                                      void toggleLight(int pin) {
                                                                                                                                        digitalWrite(pin, !digitalRead(pin));
                                                                                                                                          delay(200); // Debounce delay
                                                                                                                                          }

                                                                                                                                          // Function to control fan speed
                                                                                                                                          void controlFan() {
                                                                                                                                            fanSpeed = (fanSpeed + 1) % 6; // Cycle through speeds
                                                                                                                                              int pwmValue = map(fanSpeed, 0, 5, 0, 255); // Map speed to PWM value
                                                                                                                                                analogWrite(FAN_CONTROL_PIN, pwmValue);
                                                                                                                                                  delay(200); // Debounce delay
                                                                                                                                                  }