Project showcase
Clock With Alarm, Hygrometer & Thermometer

Clock With Alarm, Hygrometer & Thermometer © GPL3+

This clock is made with Arduino Uno board, AM2302 sensor and DS3231 RTC module + 1.8"TFT display with ST7735.

  • 2,068 views
  • 1 comment
  • 4 respects

Components and supplies

Apps and online services

About this project

I made a new clock using this schematic:

Code

clockArduino
full sketch for clock
// original sketch from http://educ8s.tv/arduino-real-time-clock/
// Nicu FLORICA (niq_ro) from http://www.arduinotehniq.com 
// made some chenages for animate display with blinking signs
// eliminate library for clock, use just subroutines
// use 3 buttons for manual adjust the data & clock
// add alarm (now usee eeprom memory for store hour alarm)

#include <Adafruit_ST7735.h>
#include <Adafruit_GFX.h>
#include <Wire.h>
#include <SPI.h>
#include "EEPROM.h"

#define TFT_CS     9
#define TFT_RST    7                      
#define TFT_DC     8
Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS,  TFT_DC, TFT_RST);

// Option 2: use any pins but a little slower!
#define TFT_SCLK 13   // set these to be whatever pins you like!
#define TFT_MOSI 11   // set these to be whatever pins you like!

float maxTemperature=0;
float minTemperature=200;
char charMinTemperature[10];
char charMaxTemperature[10];
char timeChar[100];
char dateChar[50];
char temperatureChar[10];

float temperature = 0;
float previousTemperature = 0;

String dateString;
int minuteNow=0;
int minutePrevious=0;


#define DS3231_I2C_ADDRESS 104
byte tMSB, tLSB;
float temp3231;
float temperatura, temperatura0;
byte hh, mm, ss;
byte yy, ll, dd, zz;

#define meniu 2 
#define minus 3
#define plus 4
#define alarm 5
#define buzzer 6
int nivel = 0;   // if is 0 - clock
                 // if is 1 - hour adjust
                 // if is 2 - minute adjust

int hh1, mm1, zz1, dd1, ll1, yy1;   
int maxday;
boolean initial = 1;
char chartemp[3];
int hha, mma;   // for alarm
byte al;     // for alarm 
byte xa = 80;
byte ya = 70;

#include "DHT.h"
#define DHTPIN 16     // what pin we're connected to
// Uncomment whatever type you're using!
//#define DHTTYPE DHT11   // DHT 11 
#define DHTTYPE DHT22   // DHT 22  (AM2302)
//#define DHTTYPE DHT21   // DHT 21 (AM2301)
// Connect pin 1 (on the left) of the sensor to +5V
// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1
// to 3.3V instead of 5V!
// Connect pin 2 of the sensor to whatever your DHTPIN is
// Connect pin 4 (on the right) of the sensor to GROUND
// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor

// Initialize DHT sensor for normal 16mhz Arduino
DHT dht(DHTPIN, DHTTYPE);
// NOTE: For working with a faster chip, like an Arduino Due or Teensy, you
// might need to increase the threshold for cycle counts considered a 1 or 0.
// You can do this by passing a 3rd parameter for this threshold.  It's a bit
// of fiddling to find the right value, but in general the faster the CPU the
// higher the value.  The default for a 16mhz AVR is a value of 6.  For an
// Arduino Due that runs at 84mhz a value of 30 works.
// Example to initialize DHT sensor for Arduino Due:
//DHT dht(DHTPIN, DHTTYPE, 30);
//float temperatura;
int umiditate;
int tzeci, tunit, tzecimi, trest;
int tsemn, ttot;
int hzeci, hunit;
int previousHumidity = 0;
char umiditateChar[10];
unsigned long masurare;
unsigned long intervalmasurare = 30000;

void setup () 
{
    dht.begin(); 
    tft.initR(INITR_BLACKTAB);
    tft.fillScreen(ST7735_BLACK);
    Serial.begin(9600);
    Wire.begin();
pinMode(meniu, INPUT); 
pinMode(plus, INPUT); 
pinMode(minus, INPUT); 
pinMode(alarm, INPUT); 
pinMode(buzzer, OUTPUT);
digitalWrite(meniu, HIGH);  // put inputs in high state (when push is to ground -> low state)
digitalWrite(plus, HIGH);
digitalWrite(minus, HIGH);
digitalWrite(alarm, HIGH);
digitalWrite(buzzer, LOW);
    printText("TEMPERATURE", ST7735_GREEN,5,85,1);  // Temperature Static Text
    printText("HUMIDITY", ST7735_RED,5,130,1);

// setDS3231time(byte second, byte minute, byte hour, byte dayOfWeek, byte dayOfMonth, byte month, byte year);
//setDS3231time(0, 45, 13, 0, 25, 11, 2016;

//  hha = 7;
//  mma = 00;
//  al = 1;  // 0 = alarm is off (must put in 1 foar active)

hha = EEPROM.read(100);
mma = EEPROM.read(101);
al = EEPROM.read(102);

if ((hha < 0) || (hha > 23)) hha = 7;
if ((mma < 0) || (mma > 59)) mma = 0;
if ((al < 0) || (al > 1)) al = 0;

//temperature = dht.readTemperature();
//umiditate = dht.readHumidity();
masurare = millis();
}


void loop () 
{

if (nivel == 0)
{
if (digitalRead(meniu) == LOW)
  {
  nivel = nivel+1;
  hh1=hh;
  mm1=mm;
  zz1=zz;
  yy1=yy;
  ll1=ll;
  dd1=dd;
  delay(500);
  tft.fillScreen(ST7735_BLACK);
  tft.fillRect(0,0,128,160,ST7735_BLACK);
  }

if (((millis() - masurare) > intervalmasurare) || initial)
{
temperature = dht.readTemperature();
umiditate = dht.readHumidity();
delay(500);
masurare = millis();
} 
  readDS3231time(&ss, &mm, &hh, &zz, &dd, &ll,&yy);

    String halarma = "";
    if(hha<10)
    {
         halarma = halarma+" "+String(hha);
    }else  
    halarma = halarma+ String(hha);
    if(mma<10)
    {
        halarma = halarma+":0"+String(mma);
    }else
    {
        halarma = halarma+":"+String(mma);
    }
    halarma.toCharArray(timeChar,100);

if (digitalRead(alarm) == LOW)
  {
  al = al + 1;
  EEPROM.write(102, al%2);
  delay(500);
  }
if (mma == mm & hha == hh & al%2)
{
digitalWrite(buzzer, HIGH);
   tft.drawCircle(xa, ya, 5, ST7735_RED); 
   tft.drawLine(xa, ya, xa, ya-5, ST7735_RED);
   tft.drawLine(xa, ya, xa+4, ya+4, ST7735_RED); 
   printText(timeChar, ST7735_RED,xa+7,ya,1);
}
else
{
if (al%2 == 0)
{
    tft.drawCircle(xa, ya, 5, ST7735_BLUE); 
    tft.drawLine(xa, ya, xa, ya-5, ST7735_BLUE);
    tft.drawLine(xa, ya, xa+4, ya+4, ST7735_BLUE); 
  digitalWrite(buzzer, LOW);
    printText(timeChar, ST7735_BLUE,xa+7,ya,1);
}
if (al%2 == 1)
{
    tft.drawCircle(xa, ya, 5, ST7735_WHITE); 
    tft.drawLine(xa, ya, xa, ya-5, ST7735_WHITE);
    tft.drawLine(xa, ya, xa+4, ya+4, ST7735_WHITE); 
  digitalWrite(buzzer, LOW);
    printText(timeChar, ST7735_WHITE,xa+7,ya,1);
}
}
 
  minuteNow = mm;
  if(minuteNow!=minutePrevious || initial)
  {
    initial = 0;
    dateString = getDayOfWeek(zz)+", ";
    dateString = dateString+String(dd)+"/"+String(ll);
    dateString= dateString+"/"+ String(yy); 
    minutePrevious = minuteNow;
    String hours = "";
    if(hh<10)
    {
         hours = hours+" "+String(hh);
    }else  
    hours = hours+ String(hh);
    if(mm<10)
    {
        hours = hours+" 0"+String(mm);
    }else
    {
        hours = hours+" "+String(mm);
    }
    
    hours.toCharArray(timeChar,100);
    tft.fillRect(0,0,160,65,ST7735_BLACK);
  //  printText(timeChar, ST7735_WHITE,20,25,3);
    printText(timeChar, ST7735_YELLOW,5,25,4);
    dateString.toCharArray(dateChar,50);
    printText(dateChar, ST7735_GREEN,8,5,1);
  }
  
  if ((temperature != previousTemperature) || initial)
  {
    previousTemperature = temperature;
    String temperatureString = String(temperature,1);
    temperatureString.toCharArray(temperatureChar,10);
    tft.fillRect(0,98,128,27,ST7735_BLACK);
    printText(temperatureChar, ST7735_WHITE,10,100,3);
    printText("o", ST7735_WHITE,90,95,2);
    printText("C", ST7735_WHITE,105,100,3);

  if((umiditate != previousHumidity) || initial)
  {
    previousHumidity = umiditate;
    String umiditateString = String(umiditate);
    umiditateString.toCharArray(umiditateChar,10);
    tft.fillRect(55,130,128,27,ST7735_BLACK);
    printText(umiditateChar, ST7735_WHITE,55,130,3);
    printText("%RH", ST7735_WHITE,91,130,2);
  }
  }


delay(500);
//     printText("o", ST7735_WHITE,62,28,1);
//     printText("o", ST7735_WHITE,62,35,1);
     printText("o", ST7735_YELLOW,62,28,1);
     printText("o", ST7735_YELLOW,62,35,1);

delay(500);
     printText("o", ST7735_BLACK,62,28,1);
     printText("o", ST7735_BLACK,62,35,1);
} // end usual case (clock)


if (nivel == 1)   // change hours
{
if (digitalRead(meniu) == LOW)
  {
  nivel = nivel+1;
   delay(500);
  tft.fillScreen(ST7735_BLACK);
  tft.fillRect(0,0,128,160,ST7735_BLACK);
  }    

printText("SETTING", ST7735_GREEN,10,18,2);  // Temperature Static Text
printText("HOUR:", ST7735_GREEN,10,36,2);  // Temperature Static Text
dtostrf(hh1,3, 0, chartemp); 
      //tft.fillRect(50,50,70,18,ST7735_BLACK);
      tft.fillRect(50,50,70,38,ST7735_BLACK);
      delay(50);
      printText(chartemp, ST7735_WHITE,60,50,2);
      delay(50);
      
if (digitalRead(plus) == LOW)
    {
    hh1 = hh1+1;
    delay(150);
    }
if (digitalRead(minus) == LOW)
    {
    hh1 = hh1-1;
    delay(150);
    }    
if (hh1 > 23) hh1 = 0;
if (hh1 < 0) hh1 = 23;       
     
}  // end loop nivel = 1 (change the hours)

if (nivel == 2)   // change minutes
{
if (digitalRead(meniu) == LOW)
  {
  nivel = nivel+1;
  delay(500);
  tft.fillScreen(ST7735_BLACK);
  tft.fillRect(0,0,128,160,ST7735_BLACK);
  }    

printText("SETTING", ST7735_GREEN,10,18,2);  // Temperature Static Text
tft.fillRect(10,35,70,18,ST7735_BLACK);
printText("MINUTE:", ST7735_GREEN,10,35,2);  // Temperature Static Text
Serial.println(mm1);
dtostrf(mm1,3, 0, chartemp); 
      tft.fillRect(50,50,70,18,ST7735_BLACK);
      delay(50);
      printText(chartemp, ST7735_WHITE,60,50,2);
      delay(50);
     
if (digitalRead(plus) == LOW)
    {
    mm1 = mm1+1;
    delay(150);
    }
if (digitalRead(minus) == LOW)
    {
    mm1 = mm1-1;
    delay(150);
    }    
if (mm1 > 59) mm1 = 0;
if (mm1 < 0) mm1 = 59;       
     
}  // end loop nivel = 2 (change the minutes)

if (nivel == 3)   // change day in week
{
if (digitalRead(meniu) == LOW)
  {
  nivel = nivel+1;
  delay(500);
  tft.fillScreen(ST7735_BLACK);
  tft.fillRect(0,0,128,160,ST7735_BLACK);
  }    

printText("SETTING", ST7735_GREEN,10,18,2);  // Temperature Static Text
tft.fillRect(0,35,128,18,ST7735_BLACK);
printText("Day in Week:", ST7735_GREEN,10,40,1);  // Temperature Static Text
//Serial.println(mm1);
dtostrf(zz1,3, 0, chartemp); 
      tft.fillRect(50,50,70,18,ST7735_BLACK);
      delay(50);
      printText(chartemp, ST7735_WHITE,60,50,2);
tft.fillRect(10,80,100,18,ST7735_BLACK);      
if (zz1 == 1) printText("1 - Monday", ST7735_RED,10,80,1);  // Temperature Static Text
if (zz1 == 2) printText("2 - Tuesday", ST7735_RED,10,80,1);  // Temperature Static Text
if (zz1 == 3) printText("3 - Wednesday", ST7735_RED,10,80,1);  // Temperature Static Text
if (zz1 == 4) printText("4 - Thursday", ST7735_RED,10,80,1);  // Temperature Static Text
if (zz1 == 5) printText("5 - Friday", ST7735_RED,10,80,1);  // Temperature Static Text
if (zz1 == 6) printText("6 - Saturday", ST7735_RED,10,80,1);  // Temperature Static Text
if (zz1 == 0) printText("0 - Sunday", ST7735_RED,10,80,1);  // Temperature Static Text  
    delay(50);
     
if (digitalRead(plus) == LOW)
    {
    zz1 = zz1+1;
    delay(150);
    }
if (digitalRead(minus) == LOW)
    {
    zz1 = zz1-1;
    delay(150);
    }    
if (zz1 > 6) zz1 = 0;
if (zz1 < 0) zz1 = 6;       
     
}  // end loop nivel = 3 (change the day of the week)

if (nivel == 4)   // change year
{
if (digitalRead(meniu) == LOW)
  {
  nivel = nivel+1;
  delay(500);
  tft.fillScreen(ST7735_BLACK);
  tft.fillRect(0,0,128,160,ST7735_BLACK);
  tft.fillRect(10,80,100,18,ST7735_BLACK);    
  }    

printText("SETTING", ST7735_GREEN,10,18,2);  // Temperature Static Text
tft.fillRect(10,35,70,18,ST7735_BLACK);
printText("YEAR:", ST7735_GREEN,10,35,2);  // Temperature Static Text
dtostrf(yy1,3, 0, chartemp); 
      tft.fillRect(40,50,80,18,ST7735_BLACK);
      tft.fillRect(10,80,100,18,ST7735_BLACK);  // erase last explication...
      delay(50);
      printText("20", ST7735_WHITE,45,50,2);
      printText(chartemp, ST7735_WHITE,60,50,2);
      delay(50);

     
if (digitalRead(plus) == LOW)
    {
    yy1 = yy1+1;
    delay(150);
    }
if (digitalRead(minus) == LOW)
    {
    yy1 = yy1-1;
    delay(150);
    }    
if (yy1 > 49) yy1 = 49;
if (yy1 < 16) yy1 = 16;       
     
}  // end loop stare = 4 (change the year)


if (nivel == 5)   // change mounth
{
if (digitalRead(meniu) == LOW)
  {
  nivel = nivel+1;
  delay(500);
  tft.fillScreen(ST7735_BLACK);
   tft.fillRect(10,80,100,18,ST7735_BLACK);    
  }    
printText("SETTING", ST7735_GREEN,10,18,2);  // Temperature Static Text
tft.fillRect(10,35,70,18,ST7735_BLACK);
printText("MONTH:", ST7735_GREEN,10,35,2);  // Temperature Static Text
dtostrf(ll1,3, 0, chartemp); 
      tft.fillRect(40,50,80,18,ST7735_BLACK);
      tft.fillRect(10,80,100,18,ST7735_BLACK);  // erase last explication...
      delay(50);
      printText(chartemp, ST7735_WHITE,60,50,2);
      delay(50);
     
if (digitalRead(plus) == LOW)
    {
    ll1 = ll1+1;
    delay(150);
    }
if (digitalRead(minus) == LOW)
    {
    ll1 = ll1-1;
    delay(150);
    }    
   
if (ll1 > 12) ll1 = 1;
if (ll1 < 1) ll1 = 12;       
     
}  // end loop stare = 5 (change the day as data)

if (nivel == 6)   // change day as data
{
if (digitalRead(meniu) == LOW)
  {
  nivel = nivel+1;
  delay(500);
  tft.fillScreen(ST7735_BLACK);
 tft.fillRect(10,80,100,18,ST7735_BLACK);      
  }    

printText("SETTING", ST7735_GREEN,10,18,2);  // Temperature Static Text
tft.fillRect(10,35,70,18,ST7735_BLACK);
printText("DAY:", ST7735_GREEN,10,35,2);  // Temperature Static Text
dtostrf(dd1,3, 0, chartemp); 
      tft.fillRect(50,50,70,18,ST7735_BLACK);
      tft.fillRect(10,80,100,18,ST7735_BLACK);  // erase last explication...
      delay(50);
      printText(chartemp, ST7735_WHITE,60,50,2);
      delay(50);
 
if (digitalRead(plus) == LOW)
    {
    dd1 = dd1+1;
    delay(150);
    }
if (digitalRead(minus) == LOW)
    {
    dd1 = dd1-1;
    delay(150);
    }    
    
 // Dawn & Dusk controller. http://andydoz.blogspot.ro/2014_08_01_archive.html
 if (ll == 4 || ll == 5 || ll == 9 || ll == 11) { //30 days hath September, April June and November
    maxday = 30;
  }
  else {
  maxday = 31; //... all the others have 31
  }
  if (ll ==2 && yy % 4 ==0) { //... Except February alone, and that has 28 days clear, and 29 in a leap year.
    maxday = 29;
  }
  if (ll ==2 && ll % 4 !=0) {
    maxday = 28;
  }

if (dd1 > maxday) dd1 = 1;
if (dd1 < 1) dd1 = maxday;       
     
}  // end loop nivel = 6 (change the day as data)

if (nivel == 7)   // change hours alarm
{
if (digitalRead(meniu) == LOW)
  {
  nivel = nivel+1;
  delay(500);
  tft.fillScreen(ST7735_BLACK);
  tft.fillRect(0,0,128,160,ST7735_BLACK);
  }    
tft.fillRect(10,15,100,38,ST7735_BLACK);
printText("ALARM", ST7735_GREEN,10,18,2);  // Temperature Static Text
printText("HOUR:", ST7735_GREEN,10,36,2);  // Temperature Static Text
dtostrf(hha,3, 0, chartemp); 
      //tft.fillRect(50,50,70,18,ST7735_BLACK);
      tft.fillRect(50,50,70,38,ST7735_BLACK);
      delay(50);
      printText(chartemp, ST7735_WHITE,60,50,2);
      delay(50);
      
if (digitalRead(plus) == LOW)
    {
    hha = hha+1;
    delay(150);
    }
if (digitalRead(minus) == LOW)
    {
    hha = hha-1;
    delay(150);
    }    
if (hha > 23) hha = 0;
if (hha < 0) hha = 23;       
     
}  // end loop nivel = 7 (change the hours)

if (nivel == 8)   // change minutes for alarm
{
if (digitalRead(meniu) == LOW)
  {
  nivel = nivel+1;
  delay(500);
  tft.fillScreen(ST7735_BLACK);
  tft.fillRect(0,0,128,160,ST7735_BLACK);
  }    
tft.fillRect(10,15,70,18,ST7735_BLACK);
printText("ALARM", ST7735_GREEN,10,18,2);  // Temperature Static Text
tft.fillRect(10,35,70,18,ST7735_BLACK);
printText("MINUTE:", ST7735_GREEN,10,35,2);  // Temperature Static Text
Serial.println(mm1);
dtostrf(mma,3, 0, chartemp); 
      tft.fillRect(50,50,70,18,ST7735_BLACK);
      delay(50);
      printText(chartemp, ST7735_WHITE,60,50,2);
      delay(50);
     
if (digitalRead(plus) == LOW)
    {
    mma = mma+1;
    delay(150);
    }
if (digitalRead(minus) == LOW)
    {
    mma = mma-1;
    delay(150);
    }    
if (mma > 59) mma = 0;
if (mma < 0) mma = 59;       
     
}  // end loop nivel = 8 (change the minutes)


 if (nivel >=9)  // readfy to return to main loop
 {
  setDS3231time(0, mm1, hh1, zz1, dd1, ll1, yy1);
  EEPROM.write(100, hha);
  EEPROM.write(101, mma);
  EEPROM.write(102, al%2);
  
  nivel = 0;  
  previousTemperature= 0.0;
  previousHumidity= 0;
  initial = 1;
   printText("TEMPERATURE", ST7735_GREEN,5,85,1);  // Temperature Static Text
   printText("HUMIDITY", ST7735_RED,5,130,1);
 }
}  // end main loop


void printText(char *text, uint16_t color, int x, int y,int textSize)
{
  tft.setCursor(x, y);
  tft.setTextColor(color);
  tft.setTextSize(textSize);
  tft.setTextWrap(true);
  tft.print(text);
}

String getDayOfWeek(int i)
{
  switch(i)
  {
    case 0: return "Monday";break;
    case 1: return "Tuesday";break;
    case 2: return "Wednesday";break;
    case 3: return "Thursday";break;
    case 4: return "Friday";break;
    case 5: return "Saturday";break;
    case 6: return "Sunday";break;
    default: return "Monday";break;
  }
}


// http://forum.arduino.cc/index.php?topic=398891.0
void setDS3231time(byte second, byte minute, byte hour, byte dayOfWeek, byte
                   dayOfMonth, byte month, byte year)
{
    // sets time and date data to DS3231
    Wire.beginTransmission(DS3231_I2C_ADDRESS);
    Wire.write(0); // set next input to start at the seconds register
    Wire.write(decToBcd(second)); // set seconds
    Wire.write(decToBcd(minute)); // set minutes
    Wire.write(decToBcd(hour)); // set hours
    Wire.write(decToBcd(dayOfWeek)); // set day of week (1=Sunday, 7=Saturday)
    Wire.write(decToBcd(dayOfMonth)); // set date (1 to 31)
    Wire.write(decToBcd(month)); // set month
    Wire.write(decToBcd(year)); // set year (0 to 99)
    Wire.endTransmission();
}

// Convert binary coded decimal to normal decimal numbers
byte bcdToDec(byte val)
{
    return ( (val / 16 * 10) + (val % 16) );
}

// Convert normal decimal numbers to binary coded decimal
byte decToBcd(byte val)
{
    return ( (val / 10 * 16) + (val % 10) );
}

void readDS3231time(byte *second,
                    byte *minute,
                    byte *hour,
                    byte *dayOfWeek,
                    byte *dayOfMonth,
                    byte *month,
                    byte *year)
{
    Wire.beginTransmission(DS3231_I2C_ADDRESS);
    Wire.write(0); // set DS3231 register pointer to 00h
    Wire.endTransmission();
    Wire.requestFrom(DS3231_I2C_ADDRESS, 7);
    // request seven bytes of data from DS3231 starting from register 00h
    *second = bcdToDec(Wire.read() & 0x7f);
    *minute = bcdToDec(Wire.read());
    *hour = bcdToDec(Wire.read() & 0x3f);
    *dayOfWeek = bcdToDec(Wire.read());
    *dayOfMonth = bcdToDec(Wire.read());
    *month = bcdToDec(Wire.read());
    *year = bcdToDec(Wire.read());
}

Schematics

revised schematic
how connect all pieces to make an interesting clock
Yhfjtfptgf5pyorm2c8j

Comments

Similar projects you might like

Adjusting Dual Clock using DS3231 on 1.8" ST7735 Display

Project showcase by FLORICA Tudor-Nicusor

  • 3,969 views
  • 2 comments
  • 11 respects

Alarm Clock and Timer Working Standalone

Project showcase by ozyRonald

  • 5,623 views
  • 6 comments
  • 10 respects

Alarm Clock

by Tittiamo

  • 46,972 views
  • 59 comments
  • 47 respects

Complete Digital Clock Including Alarm and Motion Sensor

Project tutorial by LAGSILVA

  • 12,680 views
  • 11 comments
  • 50 respects

Sensal - All Senses Alarm Clock

Project in progress by Leonid Piliptsevich

  • 9,569 views
  • 2 comments
  • 29 respects

Talking Clock 2 - New Version (Bilingual: EN-PT)

Project tutorial by LAGSILVA

  • 7,351 views
  • 19 comments
  • 33 respects
Add projectSign up / Login