#include <OneWire.h>
#include <DallasTemperature.h>

// ===== Timer =====
const unsigned long interval = 30UL * 60UL * 1000UL; // 30 min
unsigned long previousMillis = 0;

// ===== DS18B20 =====
#define ONE_WIRE_BUS 4
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature tempSensor(&oneWire);

// ===== Voltage (ADC) =====
#define VOLTAGE_PIN 34   // ADC pin ESP32
const float ADC_MAX = 4095.0; // 12-біт ADC ESP32
const float VOLTAGE_REF = 3.3;

// ===== ID sensor =====
const int sensorID = 1;  // for evry esp ESP

float temperature = 0.0;
float voltage = 0.0;

// ===== Sensor functions =====
void readSensors() {
  tempSensor.requestTemperatures();
  temperature = tempSensor.getTempCByIndex(0);

  int raw = analogRead(VOLTAGE_PIN);
  voltage = (raw / ADC_MAX) * VOLTAGE_REF; 
}


// ===== SETUP =====
void setup() {
  Serial.begin(115200);

  // DS18B20
  tempSensor.begin();
}

// ===== LOOP =====
void loop() {
  unsigned long now = millis();

  if (now - previousMillis >= interval || previousMillis == 0) {
    previousMillis = now;

    readSensors();
    Serial.print("Temperature: ");
    Serial.print(temperature);
    Serial.print(" °C, Voltage: ");
    Serial.println(voltage);

    
  }
}