//TUGAS PRAKTIKUM Mikrokontroller dan IoT
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

const float ADC_VREF_mV = 3300.0; // in millivolt
const float ADC_RESOLUTION = 4096.0; 
const int sensorLM35 = 4; //pin sensor suhu lm35
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1); 

void setup() {
  Serial.begin(115200); 
  Serial.println("HALO HARDIANTI");
  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 OLED initialization failed"));
    // Masukkan peringatan di sini dan hentikan eksekusi jika OLED gagal
    while (1);  // Membuat ESP32 tetap di loop jika OLED gagal
  }
}

void loop() {
  //program konversi ADC ke suhu
  int adcVal = analogRead(sensorLM35);
  float adcValVoltage = adcVal * (ADC_VREF_mV / ADC_RESOLUTION);
  float tempC = adcValVoltage / 10;
  float x = (53 + 31 + 3 + 3) * 0.01;
  float temperature = tempC * x;

  Serial.print("Temperature: ");
  Serial.print(temperature);// print suhu dalam °C
  Serial.println("°C");

  oled.clearDisplay(); // clear display

  oled.setTextSize(2);         // ukuran font
  oled.setTextColor(WHITE);    // warna font
  oled.setCursor(14, 28);      
  oled.print(temperature);
  oled.print((char)247);
  oled.print("C");

  oled.display();             
}