Temperature Monitor rev_01

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    - Project: Temperature Monitor
    - Source Code NOT compiled for: ESP32 DevKit V1
    - Source Code created on: 2024-09-20 09:58:11

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* afficher la température sur un tft LCD 3.5" ainsi */
    /* qu'un curseur pour générer une alarme température */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include <DS18B20.h>    // https://github.com/matmunk/DS18B20
#include <TFT_eSPI.h>  // TFT library for 3.5" LCD
#include <SPI.h>       // SPI library for communication with TFT

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

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t DS18B20_DQ_PIN = 4;  // Changed the variable name to a valid identifier

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
// Create an instance of the DS18B20 class, passing the digital pin number as a parameter
DS18B20 ds(DS18B20_DQ_PIN);

// Create an instance of the TFT display
TFT_eSPI tft = TFT_eSPI(); // Invoke library

/****** ALARM THRESHOLDS *****/
#define LOW_ALARM 20
#define HIGH_ALARM 25

void setup(void)
{
    // Initialize serial communication for debugging
    Serial.begin(9600);

    // Set the pin mode for the DS18B20 data pin
    pinMode(DS18B20_DQ_PIN, INPUT);

    // Initialize the TFT display
    tft.init();
    tft.setRotation(1); // Set the rotation of the display
    tft.fillScreen(TFT_BLACK); // Clear the screen with black color
    tft.setTextColor(TFT_WHITE); // Set text color to white
    tft.setTextSize(2); // Set text size

    // Define the address of the DS18B20 sensor (replace with your actual sensor address)
    uint8_t address[] = {40, 250, 31, 218, 4, 0, 0, 52};

    // Select the DS18B20 sensor using its address
    if (ds.select(address)) {
        // Set the alarm thresholds for the temperature
        ds.setAlarms(LOW_ALARM, HIGH_ALARM);
    } else {
        Serial.println("Device not found!");
    }
}

void loop(void)
{
    // Define the address of the DS18B20 sensor (should match the address used in setup)
    uint8_t address[] = {40, 250, 31, 218, 4, 0, 0, 52};

    // Check if the DS18B20 sensor is selected
    if (ds.select(address)) {
        // Get the current temperature
        float temperature = ds.getTempC();

        // Display the temperature on the TFT
        tft.fillRect(0, 0, 240, 40, TFT_BLACK); // Clear previous temperature display
        tft.setCursor(10, 10); // Set cursor position
        tft.print("Temperature: ");
        tft.print(temperature);
        tft.println(" C");

        // Check if the temperature alarm has been triggered
        if (ds.hasAlarm()) {
            // Print a warning message with the current temperature
            Serial.print("Warning! Temperature is ");
            Serial.print(temperature);
            Serial.println(" C");

            // Display alarm message on the TFT
            tft.setTextColor(TFT_RED); // Set text color to red for alarm
            tft.setCursor(10, 30); // Set cursor position for alarm message
            tft.print("ALARM! Temp: ");
            tft.print(temperature);
            tft.println(" C");
        }
    } else {
        Serial.println("Device not found!");
    }

    // Wait for 10 seconds before the next loop iteration
    delay(10000);
}

/* END CODE */