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

#define LCD_ADDRESS 0x27
#define LCD_COLUMNS 16
#define LCD_ROWS 2
LiquidCrystal_I2C lcd(LCD_ADDRESS, LCD_COLUMNS, LCD_ROWS);

typedef struct struct_message {
  float gasReading;
  bool solenoidStatus;
  bool buzzerStatus;
  char location[16];
} struct_message;

// Callback untuk menerima data
void OnDataRecv(const esp_now_recv_info *recv_info, const uint8_t *incomingData, int len) {
  Serial.println("Data received callback triggered");

  struct_message receivedData;
  memcpy(&receivedData, incomingData, sizeof(receivedData));

  Serial.print("Location: ");
  Serial.println(receivedData.location);
  Serial.print("Gas Reading: ");
  Serial.println(receivedData.gasReading);
  Serial.print("Solenoid Status: ");
  Serial.println(receivedData.solenoidStatus);
  Serial.print("Buzzer Status: ");
  Serial.println(receivedData.buzzerStatus);

  lcd.clear();

  if (receivedData.gasReading > 850) { // Threshold gas
    lcd.setCursor(0, 0);
    lcd.print("Lokasi: ");
    lcd.print(receivedData.location);
    lcd.setCursor(0, 1);
    lcd.print("Gas: ");
    lcd.print(receivedData.gasReading);
    lcd.print("ppm");
  } else {
    lcd.setCursor(0, 0);
    lcd.print("Sistem Berjalan");
    lcd.setCursor(0, 1);
    lcd.print("Normal");
  }
}

void setup() {
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);

  // Inisialisasi LCD
  lcd.init();
  lcd.backlight();
  lcd.clear();

  // Inisialisasi ESP-NOW
  if (esp_now_init() != ESP_OK) {
    Serial.println("Error initializing ESP-NOW");
    return;
  }

  // Daftarkan callback untuk menerima data
  esp_now_register_recv_cb(OnDataRecv);
}

void loop() {
  // Tidak perlu melakukan apa-apa dalam loop()
}