/* Hofkens Laurien - 16/04/2024
* Toon temperatuur op LCD
*/
// Include the libraries we need
#include <OneWire.h>
#include <DallasTemperature.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,20,4);  // set the LCD address to 0x27 for a 16 chars and 2 line display

// Data wire is plugged into port 2 on the Arduino
#define ONE_WIRE_BUS 2

// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature. 
DallasTemperature sensors(&oneWire);

/*
 * The setup function. We only start the sensors here
 */

 float minTemp = 100.0;

 float maxTemp = -100.0;

void setup()
{
  // start serial port
  Serial.begin(9600);
  Serial.println("Dallas Temperature IC Control Library Demo");

  // Start up the library
  sensors.begin();
  lcd.init();                      // initialiseer LCD 
  lcd.backlight();                 // zet achtergrondlicht aan
  lcd.setCursor(7, 0);              // zet cursor op 4e plaats van 1e rij
  lcd.print("Laurien");
}

/*
 * Main function, get and show the temperature
 */
void loop()
{ 
  // call sensors.requestTemperatures() to issue a global temperature 
  // request to all devices on the bus
  Serial.print("Requesting temperatures...");
  sensors.requestTemperatures(); // Send the command to get temperatures
  Serial.println("DONE");
  // After we got the temperatures, we can print them here.
  // We use the function ByIndex, and as an example get the temperature from the first sensor only.
  float tempC = sensors.getTempCByIndex(0);

  // Check if reading was successful
  if(tempC != DEVICE_DISCONNECTED_C) 
  {
    Serial.print("Temperature for the device 1 (index 0) is: ");
    Serial.println(tempC);
    lcd.setCursor(0,1);
    lcd.print("temp:");
    lcd.print(tempC);
    lcd.print("Celsius");
    
    lcd.setCursor(0,2);
    lcd.print("min temp:");
    lcd.print(minTemp);
    lcd.print("Celsius");

    if(tempC < minTemp) {
      minTemp = tempC;
    }
    lcd.setCursor(0,3);
    lcd.print("max temp:");
    lcd.print(maxTemp);
    lcd.print("Celsius");

    if(tempC > maxTemp) {
      maxTemp = tempC;
    }
  } 
  else
  {
    Serial.println("Error: Could not read temperature data");
    lcd.setCursor(0,1);
    lcd.print("Geen temp.sensor");
  }
  delay(1000);
}