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

const char* ssid = "Wokwi-GUEST";
const char* password = "";

#define myWriteApiKey "0V6WX19MPDMEI3A2"  // Menyimpan API Key untuk menulis data ke ThingSpeak.
#define myReadApiKey "555BG8A2M1UTIEZ1"  // Menyimpan API Key untuk membaca data dari ThingSpeak.
#define server "api.thingspeak.com"  // Menyimpan alamat server 

#define DHTPIN 2
#define DHTTYPE DHT22
#define buzzer 15
#define led_merah 19
#define led_hijau 18
String RFID[] = {"E280689401A9", "E2000019060C", "G46RD9V40F3A", "B71001B76894", "1C81159073FD", "B710D0186022"};
String NAMA[] = {"Khalid", "Gideon", "Andre", "Usama", "Dolly", "Kelompok1B"};

int idchart;

WiFiClient esp32client;
LiquidCrystal_I2C lcd(0X27, 20, 4);
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  pinMode(buzzer, OUTPUT);
  pinMode(led_merah, OUTPUT);
  pinMode(led_hijau, OUTPUT);
  lcd.init();
  lcd.backlight();
  dht.begin();

  WiFi.begin(ssid, password);
  lcd.setCursor(0,0);
  lcd.print("Connecting wifi....");
  while (WiFi.status() != WL_CONNECTED){
    delay(500);
    Serial.println(".");
  }
  Serial.println("Connected to AP");
  
  ThingSpeak.begin(esp32client);

  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Tap RFID CARD Patien");
  lcd.setCursor(0,1);
  lcd.print("Suhu : ");
  lcd.setCursor(0,2);
  lcd.print("Card : ");
  lcd.setCursor(0,3);
  lcd.print("Name : ");
}

void loop() {
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();
  if (!isnan(humidity) || !isnan(temperature)) {
    lcd.setCursor(7, 1);
    lcd.print(String(temperature) + "   ");
    Serial.println("Suhu : " + String(temperature));
  }

  if (Serial.available() > 0) {
    digitalWrite(buzzer, HIGH);
    delay(1000);
    digitalWrite(buzzer, LOW);
    String input = Serial.readStringUntil('\n');
    input.trim();
    int found = false;
    for (int i = 0; i < (sizeof(RFID)/sizeof(RFID[0])); i++) {
      if (input.equals(RFID[i])) {
        found = true;
        digitalWrite(led_hijau, HIGH);
        digitalWrite(led_merah, LOW);
        Serial.println(input + "\n Valid Card    Name : " + NAMA[i]);
        lcd.setCursor(7, 2);
        lcd.print(String(input) + " ");
        lcd.setCursor(7, 3);
        lcd.print(String(NAMA[i]) + "   ");
        idchart = i+1;
        break;
      }
    }
    if (!found) {
      idchart = 0;
      digitalWrite(led_merah, HIGH);
      digitalWrite(led_hijau, LOW);
      Serial.println(String(input) + " : Invalid Card");
      lcd.setCursor(7, 2);
      lcd.print("INVALID   ");
      lcd.setCursor(7, 3);
      lcd.print("UNKNOWN   ");
    }
  }

  ThingSpeak.setField(idchart, temperature);
  ThingSpeak.writeFields(2519799, myWriteApiKey);
}