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	- Project: "Temperature Display"
	- Source Code NOT compiled for: ESP32 DevKit V1
	- Source Code created on: 2024-07-18 09:04:33

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
	/* Display temperature readings from a DS18B20 sensor */
	/* on an LCD1602 I2C display using ESP32. The DS18B20 */
	/* is connected to GPIO 4, and the LCD uses I2C pins */
	/* SDA (GPIO 21) and SCL (GPIO 22) with address 0x27. */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include <Wire.h>
#include <DS18B20.h>  // https://github.com/matmunk/DS18B20
#include <LCDIC2.h>   // https://github.com/offcircuit/LCDIC2

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t Temp_DS18B20_DQ_PIN_D4 = 4;

/***** DEFINITION OF I2C PINS *****/
const uint8_t LCD_I2C_LCD1602I2C_I2C_PIN_SDA_D21 = 21;
const uint8_t LCD_I2C_LCD1602I2C_I2C_PIN_SCL_D22 = 22;
const uint8_t LCD_I2C_LCD1602I2C_I2C_SLAVE_ADDRESS = 0x27; // Typically 0x27 for LCD1602

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
DS18B20 ds(Temp_DS18B20_DQ_PIN_D4);  // Initialize the DS18B20 sensor with the data pin
LCDIC2 lcd(LCD_I2C_LCD1602I2C_I2C_SLAVE_ADDRESS, 16, 2); // Initialize the LCD with I2C address, width, and height

void setup(void)
{
  // put your setup code here, to run once:
  Serial.begin(9600);

  // Initialize the I2C communication for the LCD
  Wire.begin(LCD_I2C_LCD1602I2C_I2C_PIN_SDA_D21, LCD_I2C_LCD1602I2C_I2C_PIN_SCL_D22);

  // Initialize the LCD
  lcd.begin();
  lcd.print("Hello, World!");

  // Check if the DS18B20 sensor is connected
  uint8_t address[8];
  if (ds.selectNext(address)) {
    Serial.println("DS18B20 device found!");
  } else {
    Serial.println("DS18B20 device not found!");
  }
}

void loop(void)
{
  // put your main code here, to run repeatedly:
  uint8_t address[8];
  if (ds.selectNext(address)) {
    float temp = ds.getTempC();
    if (!isnan(temp)) {
      Serial.print("Temperature: ");
      Serial.print(temp);
      Serial.println(" C");
      lcd.setCursor(0, 1); // Move cursor to the second line
      lcd.print("Temp: ");
      lcd.print(temp);
      lcd.print(" C");
    } else {
      Serial.println("Failed to read temperature!");
    }
  } else {
    Serial.println("DS18B20 device not valid!");
  }

  delay(10000);
}

/* END CODE */