รวมโค้ดArduino

#include <Arduino.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <RtcDS1302.h>
#include <OneWire.h>
#include <DallasTemperature.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
ThreeWire myWire(7, 8, 6); // ขา DAT, CLK, RST (ถ้าต่อขาอื่นให้เปลี่ยนเลขครับ)
RtcDS1302<ThreeWire> Rtc(myWire);

OneWire oneWire(5);
DallasTemperature sensors(&oneWire);
float maxTemp = -999.0;
float minTemp = 999.0;

const int pinUP = 2, pinDOWN = 3, pinOK = 4;

enum Mode { MENU_MODE, TIMER_MODE, TEMP_MODE, DATETIME_MODE };
Mode currentMode = MENU_MODE;

String menus[] = {"Set Date/Time", "Max/Min Temp", "Temp Alert", "Timer/Stopwatch"};
int menuIndex = 0;


int setYY = 2026, setMM = 3, setDD = 19;
int setH = 12, setM = 0, setS = 0;
unsigned long previousMillis = 0;
unsigned long prevMillisClock = 0;
int timerH = 0, timerM = 0, timerS = 0;
int timerStep = 0;

int step = 0;
unsigned long remainingTime = 0;
unsigned long pausedTime = 0;    
unsigned long startTime = 0;
bool isRunning = false;
bool isPaused = false;          

bool lastUP = HIGH, lastDOWN = HIGH, lastOK = HIGH;

void drawMenu();
void showTempMode();
void handleDateTimeMode();

void setup() {
  sensors.begin();
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  pinMode(pinUP, INPUT_PULLUP);
  pinMode(pinDOWN, INPUT_PULLUP);
  pinMode(pinOK, INPUT_PULLUP);
  delay(100);
  lastUP = digitalRead(pinUP);
  lastDOWN = digitalRead(pinDOWN);
  lastOK = digitalRead(pinOK);
}

bool isButtonPressed(int pin, bool &lastState) {
  bool currentStateBtn = digitalRead(pin);
  if (currentStateBtn == LOW && lastState == HIGH) {
    delay(50);
    if (digitalRead(pin) == LOW) {
      lastState = LOW;
      return true;
    }
  }
  lastState = currentStateBtn;
  return false;
}

void loop() {
  if (millis() - previousMillis >= 1000) {
    previousMillis = millis();
    if(step == 6 || currentMode != DATETIME_MODE) {
      setS++;
      if (setS >= 60) { setS = 0; setM++; }
      if (setM >= 60) { setM = 0; setH++; }
      if (setH >= 24) { setH = 0; setDD++; }
    }
  }

  display.clearDisplay();
  display.setTextColor(WHITE);


  if (millis() - prevMillisClock >= 1000&& currentMode != DATETIME_MODE) {
    prevMillisClock = millis();
    setS++;
    if (setS >= 60) { setS = 0; setM++; }
    if (setM >= 60) { setM = 0; setH++; }
    if (setH >= 24) { setH = 0; setDD++; }
  }

  if (currentMode == MENU_MODE) {
    if (isButtonPressed(pinUP, lastUP)) {
      menuIndex = (menuIndex > 0) ? menuIndex - 1 : 3;
    }
    if (isButtonPressed(pinDOWN, lastDOWN)) {
      menuIndex = (menuIndex < 3) ? menuIndex + 1 : 0;
    }
    if (isButtonPressed(pinOK, lastOK)) {
      if (menuIndex == 0) { currentMode = DATETIME_MODE; step = 0; }
      else if (menuIndex == 1) { currentMode = TEMP_MODE; }
      else if (menuIndex == 3) { currentMode = TIMER_MODE; step = 0; }
       timerStep = 0;      
        timerH = 0;        
        timerM = 0;        
        timerS = 0;        
        isRunning = false;  
        isPaused = false;  
        remainingTime = 0;
    }
    drawMenu();
  }

  else if (currentMode == DATETIME_MODE) {
    handleDateTimeMode();
  }

  else if (currentMode == TEMP_MODE) {
    if (isButtonPressed(pinUP, lastUP)) {
      currentMode = MENU_MODE;
    }
    showTempMode();
  }

  else if (currentMode == TIMER_MODE) {
    if (isButtonPressed(pinUP, lastUP)) {
      if (timerStep < 3) {
        if (timerStep == 0) { timerH = (timerH + 1) % 24; }
        else if (timerStep == 1) { timerM = (timerM + 1) % 60; }
        else if (timerStep == 2) { timerS = (timerS + 1) % 60; }
      } else if (timerStep == 4) {
        if (isRunning) {
          if (!isPaused) { pausedTime = remainingTime - (millis() - startTime); isPaused = true; }
          else { startTime = millis() - (remainingTime - pausedTime); isPaused = false; }
        } else {
          remainingTime = (unsigned long)(timerH * 3600 + timerM * 60 + timerS) * 1000;
          startTime = millis(); isRunning = true; isPaused = false;
        }
      }
    }
    if (isButtonPressed(pinDOWN, lastDOWN)) {
      if (timerStep < 3) {
        if (timerStep == 0) { timerH = (timerH > 0) ? timerH - 1 : 23; }
        else if (timerStep == 1) { timerM = (timerM > 0) ? timerM - 1 : 59; }
        else if (timerStep == 2) { timerS = (timerS > 0) ? timerS - 1 : 59; }
      } else if (timerStep == 4) {
        if (isRunning) { timerStep = 0; isRunning = false; isPaused = false; }
        else { currentMode = MENU_MODE; isRunning = false; }
      }
    }
    if (isButtonPressed(pinOK, lastOK)) {
      if (timerStep < 3) { timerStep++; }
      else if (timerStep == 3) {
        remainingTime = (unsigned long)(timerH * 3600 + timerM * 60 + timerS) * 1000;
        startTime = millis(); isRunning = true; isPaused = false; timerStep = 4;
      } else if (timerStep == 4 && !isRunning) { timerStep = 0; }
    }

    if (timerStep < 3) {
      display.setTextSize(1); display.setCursor(40, 0); display.print("SET TIMER");
      display.drawFastHLine(0, 12, 128, WHITE);
      display.setTextSize(2); display.setCursor(15, 30);
      if (timerStep == 0) display.print(">");
      if (timerH < 10) display.print('0'); display.print(timerH); display.print(":");
      if (timerStep == 1) display.print(">");
      if (timerM < 10) display.print('0'); display.print(timerM); display.print(":");
      if (timerStep == 2) display.print(">");
      if (timerS < 10) display.print('0'); display.print(timerS);
    }
    else if (timerStep == 3) {
      display.setTextSize(1); display.setCursor(45, 10); display.print("START?");
      display.setTextSize(2); display.setCursor(15, 30);
      if (timerH < 10) display.print('0'); display.print(timerH); display.print(":");
      if (timerM < 10) display.print('0'); display.print(timerM); display.print(":");
      if (timerS < 10) display.print('0'); display.print(timerS);
    }
    else if (timerStep == 4) {
      unsigned long curT;
      if (isPaused) curT = pausedTime;
      else if (isRunning) {
        unsigned long elap = millis() - startTime;
        if (elap >= remainingTime) { curT = 0; isRunning = false; }
        else curT = remainingTime - elap;
      } else curT = 0;
      if (curT == 0 && !isRunning) {
        display.setTextSize(1); display.setCursor(20, 20); display.print("--- FINISH ! ---");
        display.setCursor(0, 45); display.print(" W:Rep B:Menu R:Set");
      } else {
        int h = curT / 3600000;
        int m = (curT % 3600000) / 60000;
        int s = (curT % 60000) / 1000;
        display.setTextSize(1); display.setCursor(40, 0); display.print(isPaused ? "PAUSED" : "RUNNING");
        display.setTextSize(2); display.setCursor(15, 25);
        if (h < 10) display.print('0'); display.print(h); display.print(":");
        if (m < 10) display.print('0'); display.print(m); display.print(":");
        if (s < 10) display.print('0'); display.print(s);
        display.setTextSize(1); display.setCursor(20, 55); display.print("W:P/R  B:RESET");
      }
    }
  }
  display.display();
}