Converting Arduino Compatible library to work with ESP32

Projects Libraries
16

Sure here's the code sketch to set and read time in my application:

#include <Arduino.h>
#include <LiquidCrystal_I2C.h>
#include <DS3231.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);
DS3231 rtc(SDA, SCL);

Time t;

int currentDigit = 0; // Current digit being edited (0 for hours tens, 1 for hours ones, 2 for minutes tens, etc.)
int timeInput[6];     // Array to store user input for hours tens, hours ones, minutes tens, minutes ones, seconds tens, and seconds ones

#define BUTTON_UP 2
#define BUTTON_DOWN 3
#define BUTTON_ENTER 4
#define BUTTON_BACK 5

unsigned long lastDebounceTime = 0;
unsigned long debounceDelay = 150;

bool isSetTimeMode = false; // Flag to indicate if in set time mode

void displayTime();
void adjustTime(int direction);
void switch_digit();
void set_time();

void setup()
{
    lcd.init();
    lcd.backlight();
    rtc.begin();

    pinMode(BUTTON_ENTER, INPUT_PULLUP);
    pinMode(BUTTON_UP, INPUT_PULLUP);
    pinMode(BUTTON_DOWN, INPUT_PULLUP);
    pinMode(BUTTON_BACK, INPUT_PULLUP);
}

void loop()
{
    if (!isSetTimeMode)
    {
        // Fetch current time from RTC
        t = rtc.getTime();
        timeInput[0] = t.hour / 10; // Tens digit of hours
        timeInput[1] = t.hour % 10; // Ones digit of hours
        timeInput[2] = t.min / 10;  // Tens digit of minutes
        timeInput[3] = t.min % 10;  // Ones digit of minutes
        timeInput[4] = t.sec / 10;  // Tens digit of seconds
        timeInput[5] = t.sec % 10;  // Ones digit of seconds
    }

    displayTime();

    // Check for button presses
    if (digitalRead(BUTTON_UP) == LOW)
    {
        adjustTime(1); // Increment time
        isSetTimeMode = true;
        delay(debounceDelay); // Debounce delay
    }

    if (digitalRead(BUTTON_DOWN) == LOW)
    {
        adjustTime(-1); // Decrement time
        isSetTimeMode = true;
        delay(debounceDelay); // Debounce delay
    }

    if (digitalRead(BUTTON_ENTER) == LOW)
    {
        switch_digit(); // Switch to the next digit
        isSetTimeMode = true;
        delay(debounceDelay); // Debounce delay
    }

    if (digitalRead(BUTTON_BACK) == LOW)
    {
        set_time();    // Set the time
        isSetTimeMode = false;
        delay(debounceDelay); // Debounce delay
    }
}

void displayTime()
{
    lcd.setCursor(0, 0);
    lcd.print("Set Time:");
    lcd.setCursor(3, 1);
    for (int i = 0; i < 6; i++)
    {
        lcd.print(timeInput[i]); // Display each digit of the time
        if (i == 1 || i == 3)
        {
            lcd.print(":"); // Add colon between hours, minutes, and seconds
        }
    }
}

void adjustTime(int direction)
{
    // Increment or decrement the current digit
    timeInput[currentDigit] += direction;

    // Ensure the digit stays within valid range
    switch (currentDigit)
    {
    case 0: // Tens digit of hours
        if (timeInput[currentDigit] > 2)
            timeInput[currentDigit] = 0;
        else if (timeInput[currentDigit] < 0)
            timeInput[currentDigit] = 2;
        if (timeInput[currentDigit] == 2 && timeInput[1] > 3) // If the tens digit is 2 and the ones digit exceeds 3, wrap it around
            timeInput[1] = 0;
        break;
    case 1: // Ones digit of hours
        if (timeInput[0] == 2) {
            if (timeInput[currentDigit] > 3)
                timeInput[currentDigit] = 0;
            else if (timeInput[currentDigit] < 0)
                timeInput[currentDigit] = 3;
        } else {
            if (timeInput[currentDigit] > 9)
                timeInput[currentDigit] = 0;
            else if (timeInput[currentDigit] < 0)
                timeInput[currentDigit] = 9;
        }
        break;
    case 2: // Tens digit of minutes
        if (timeInput[currentDigit] > 5)
            timeInput[currentDigit] = 0;
        else if (timeInput[currentDigit] < 0)
            timeInput[currentDigit] = 5;
        break;
    case 3: // Ones digit of minutes
        if (timeInput[currentDigit] > 9)
            timeInput[currentDigit] = 0;
        else if (timeInput[currentDigit] < 0)
            timeInput[currentDigit] = 9;
        break;
    case 4: // Tens digit of seconds
        if (timeInput[currentDigit] > 5)
            timeInput[currentDigit] = 0;
        else if (timeInput[currentDigit] < 0)
            timeInput[currentDigit] = 5;
        break;
    case 5: // Ones digit of seconds
        if (timeInput[currentDigit] > 9)
            timeInput[currentDigit] = 0;
        else if (timeInput[currentDigit] < 0)
            timeInput[currentDigit] = 9;
        break;
    }

}


void switch_digit()
{
    // Move to the next digit
    currentDigit++;

    // Wrap around if reached the last digit
    if (currentDigit > 5)
    {
        currentDigit = 0;
    }
}

void set_time()
{
    // Set the RTC time based on the entered values
    rtc.setTime(timeInput[0] * 10 + timeInput[1], timeInput[2] * 10 + timeInput[3], timeInput[4] * 10 + timeInput[5]);
    // Print message indicating time has been set
    lcd.clear(); // Clear the display
    lcd.setCursor(0, 0);
    lcd.print("Time Set!");
    delay(2000); // Display the message for 2 seconds
}