#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <ThingSpeak.h>

// WiFi settings
const char* ssid = "Wokwi-GUEST";          // your network SSID (name)
const char* password = "";  // your network password

// ThingSpeak settings
unsigned long myChannelNumber = 2552556;   // Replace with your channel number
const char* myWriteAPIKey = "I2GWMDGC2QIDT4QR";  // Replace with your Write API Key

// Define the pins for the IR sensor, buzzer, button, and LED
int IRsensor_pin = 12;  
int buzzer_pin = 14;       // GPIO pin for the buzzer
int button_pin = 17;        // GPIO pin for the button

// Address for the I2C LCD
const int lcdAddr = 0x27;  // Change this address if your module has a different address

// Number of columns and rows in the LCD
const int lcdColumns = 16;
const int lcdRows = 2;

// Initialize the LCD
LiquidCrystal_I2C lcd(lcdAddr, lcdColumns, lcdRows);

// Initialize WiFi client
WiFiClient client;

int motion_detected;
void setup() {
  Serial.begin(115200); 
  // Initialize the pins
  pinMode(IRsensor_pin, INPUT);
  pinMode(buzzer_pin, OUTPUT);
  pinMode(button_pin, INPUT_PULLUP); // Enable internal pull-up resistor

  // Initialize the I2C communication
  Wire.begin();

  // Initialize the LCD
  lcd.init();
  lcd.backlight(); // Turn on the backlight
  
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("WiFi connected");

  // Initialize ThingSpeak
  ThingSpeak.begin(client);
}

void loop() {
  // Read the flame sensor
  if (digitalRead(IRsensor_pin) == 1) { // Flame detected
    digitalWrite(buzzer_pin, HIGH); // Activate the buzzer
    delay(2000); // Keep the buzzer on for 2 seconds
    motion_detected = 1;
    
    // Display "Flame detected" on the LCD
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Motion detected");
  } else { // No flame detected
    digitalWrite(buzzer_pin, LOW); // Turn off the buzzer
    motion_detected = 0;
    
    // Clear the LCD
    lcd.clear();
  }
  // Alternate sent data **Remove for actual
  if (motion_detected == 0) {
    motion_detected == 1;
  } else {
    motion_detected == 0;
  }

  // Read the button state
  if (digitalRead(button_pin) == HIGH) { // Button pressed
    if (digitalRead(buzzer_pin) == HIGH) {
      digitalWrite(buzzer_pin, LOW); // Turn on the LED
    }
  }

  // Send data to ThingSpeak
  ThingSpeak.setField(1, motion_detected); // Update the field with flame sensor data
  Serial.print("Motion Detection: ");
  Serial.println(motion_detected);

  // Write to ThingSpeak
  int x = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);

  if (x == 200) {
    Serial.println("Channel update successful.");
  } else {
    Serial.println("Problem updating channel. HTTP error code " + String(x));
  }

  delay(5000);
}