Hi,
I tried thisReal_Time_Clock_With_Alarm.ino (7.4 KB)
project, but I saw that the alarm does not work properly when I cut off the power for a short time The alarm remains set but does not work. If I updated eeprom works again .
I saw that the alarm remains set even if the battery is removed, I don't understand why it is no longer taken into account when the power is turned off.I wrote the problem in project page but I not received an answer
Please post your code, in code tags.
And maybe ask a moderator to move this to a more appropriate section of the forum.
I found similar code here: https://github.com/embeddedlab786/Real_Time_Clock_With_Alarm, but a I2C display was added to the sketch.
Yes That is the code. I used parallel display
I tried to keep power on the eeprom when main power is off but that do not resolve the problem .
See reply #2
#include <DS3231.h>//Memanggil RTC3231 Library
#include <Wire.h> // i2C Conection Library
#include <LiquidCrystal.h> //Libraries
#include <EEPROM.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal lcd(2, 3, 4, 5, 6, 7);
#define bt_time A0
#define bt_up A1
#define bt_down A2
#define bt_alarm A3
#define buzzer 8
// Init DS3231
DS3231 rtc(SDA, SCL);
// Init a Time-data structure
Time t; //pencacah string time()
int hh = 0, mm = 0, ss = 0, dd = 0, bb = 0, set_day;
int yy = 0;
String Day = " ";
int AlarmHH = 21, AlarmMM = 22, AlarmSS = 23, setMode = 0, setAlarm = 0, alarmMode=0;
int stop =0, mode=0, flag=0;
//Eeprom Store Variable
uint8_t HH;
uint8_t MM;
byte bell_symbol[8] = {
B00100,
B01110,
B01110,
B01110,
B01110,
B11111,
B01000,
B00100};
byte thermometer_symbol[8] = {
B00100,
B01010,
B01010,
B01110,
B01110,
B11111,
B11111,
B01110};
void setup(){
// Setup Serial connection
Serial.begin(9600);
//lcd.backlight();
//lcd.init();
rtc.begin(); // memulai koneksi i2c dengan RTC
pinMode(bt_time, INPUT_PULLUP);
pinMode(bt_up, INPUT_PULLUP);
pinMode(bt_down, INPUT_PULLUP);
pinMode(bt_alarm, INPUT_PULLUP);
pinMode(buzzer, OUTPUT);
lcd.createChar(1, thermometer_symbol);
lcd.createChar(2, bell_symbol);
lcd.begin(16, 2); // Configura lcd numero columnas y filas
lcd.setCursor(0,0); //Show "TIME" on the LCD
lcd.setCursor (0,0);
lcd.print(" Real Time Clock ");
lcd.setCursor (0,1);
lcd.print(" With Alarm ");
delay (2000);
lcd.clear();
stop=EEPROM.read(50);
if(stop==0){
}else{WriteEeprom ();}
EEPROM.write(50,0);
ReadEeprom();
//Set RTC Untuk Pertama kali
//rtc.setDOW(2); // Set Day-of-Week to SUNDAY
//rtc.setTime (00, 9, 50);
//rtc.setDate(12, 11, 2017);
}
void loop(){
t = rtc.getTime();
Day = rtc.getDOWStr(1);
if (setMode == 0){
hh = t.hour,DEC;
mm = t.min,DEC;
ss = t.sec,DEC;
dd = t.date,DEC;
bb = t.mon,DEC;
yy = t.year,DEC;
}
if(setAlarm==0){
lcd.setCursor(0,0);
lcd.print((hh/10)%10);
lcd.print(hh % 10);
lcd.print(":");
lcd.print((mm/10)%10);
lcd.print(mm % 10);
lcd.print(":");
lcd.print((ss/10)%10);
lcd.print(ss % 10);
lcd.print(" ");
if(mode==1){lcd.write(2);}
else{lcd.print(" ");}
lcd.print(" ");
lcd.write(1);
lcd.print(rtc.getTemp(),0);
lcd.write(223);
lcd.print("C");
lcd.print(" ");
lcd.setCursor(1,1);
lcd.print(Day);
lcd.print(" ");
lcd.print((dd/10)%10);
lcd.print(dd % 10);
lcd.print("/");
lcd.print((bb/10)%10);
lcd.print(bb % 10);
lcd.print("/");
lcd.print((yy/1000)%10);
lcd.print((yy/100)%10);
lcd.print((yy/10)%10);
lcd.print(yy % 10);
}
setupClock();
setTimer();
delay (100);
blinking();
//Alarm
if (alarmMode==1 && mode==1 && hh==AlarmHH && mm==AlarmMM && ss>=AlarmSS) {
digitalWrite(buzzer, HIGH);
delay (300);
digitalWrite(buzzer, LOW);
}else{digitalWrite(buzzer, LOW);}
delay (100);
}
void blinking (){
//BLINKING SCREEN
if (setAlarm <2 && setMode == 1){lcd.setCursor(0,0); lcd.print(" ");}
if (setAlarm <2 && setMode == 2){lcd.setCursor(3,0); lcd.print(" ");}
if (setAlarm <2 && setMode == 3){lcd.setCursor(6,0); lcd.print(" ");}
if (setAlarm <2 && setMode == 4){lcd.setCursor(1,1); lcd.print(" ");}
if (setAlarm <2 && setMode == 5){lcd.setCursor(5,1); lcd.print(" ");}
if (setAlarm <2 && setMode == 6){lcd.setCursor(8,1); lcd.print(" ");}
if (setAlarm <2 && setMode == 7){lcd.setCursor(11,1); lcd.print(" "); }
//Alarm
if (setMode == 0 && setAlarm == 1){lcd.setCursor(6,0); lcd.print(" "); }
if (setMode == 0 && setAlarm == 2){lcd.setCursor(4,1); lcd.print(" "); }
if (setMode == 0 && setAlarm == 3){lcd.setCursor(7,1); lcd.print(" "); }
if (setMode == 0 && setAlarm == 4){lcd.setCursor(10,1);lcd.print(" "); }
}
//Seting Jam ,Tanggal,Alarm/Timer
void setupClock (void) {
if (setMode == 8){
lcd.setCursor (0,0);
lcd.print (F("Set Date Finish "));
lcd.setCursor (0,1);
lcd.print (F("Set Time Finish "));
delay (1000);
rtc.setTime (hh, mm, ss);
rtc.setDate (dd, bb, yy);
lcd.clear();
setMode = 0;
}
if (setAlarm == 5){
lcd.setCursor (0,0);
lcd.print (F("Set Alarm Finish"));
lcd.setCursor (0,1);
lcd.print (F("-EEPROM Updated-"));
WriteEeprom();
delay (2000);
lcd.clear();
setAlarm=0;
alarmMode=1;
}
if (setAlarm >0){ alarmMode=0;}
if(digitalRead (bt_time) == 0 && flag==0) {flag=1;
if(setAlarm>0){setAlarm=5;}
else{setMode = setMode+1;}
}
if(digitalRead (bt_alarm) == 0 && flag==0){flag=1;
if(setMode>0){setMode=8;}
else{setAlarm = setAlarm+1;}
lcd.clear();}
if(digitalRead (bt_time) == 1 && digitalRead (bt_alarm) == 1){flag=0;}
if(digitalRead (bt_up) == 0){
if (setAlarm<2 && setMode==1)hh=hh+1;
if (setAlarm<2 && setMode==2)mm=mm+1;
if (setAlarm<2 && setMode==3)ss=ss+1;
if (setAlarm<2 && setMode==4)set_day=set_day+1;
if (setAlarm<2 && setMode==5)dd=dd+1;
if (setAlarm<2 && setMode==6)bb=bb+1;
if (setAlarm<2 && setMode==7)yy=yy+1;
//Alarm
if (setMode==0 && setAlarm==1)mode=1;
if (setMode==0 && setAlarm==2 && AlarmHH<23)AlarmHH=AlarmHH+1;
if (setMode==0 && setAlarm==3 && AlarmMM<59)AlarmMM=AlarmMM+1;
if (setMode==0 && setAlarm==4 && AlarmSS<59)AlarmSS=AlarmSS+1;
if(hh>23)hh=0;
if(mm>59)mm=0;
if(ss>59)ss=0;
if(set_day>7)set_day=0;
if(dd>31)dd=0;
if(bb>12)bb=0;
if(yy>2030)yy=2000;
rtc.setDOW(set_day);
}
if(digitalRead (bt_down) == 0){
if (setAlarm<2 && setMode==1)hh=hh-1;
if (setAlarm<2 && setMode==2)mm=mm-1;
if (setAlarm<2 && setMode==3)ss=ss-1;
if (setAlarm<2 && setMode==4)set_day=set_day-1;
if (setAlarm<2 && setMode==5)dd=dd-1;
if (setAlarm<2 && setMode==6)bb=bb-1;
if (setAlarm<2 && setMode==7)yy=yy-1;
//Alarm
if (setMode==0 && setAlarm==1 )mode=0;
if (setMode==0 && setAlarm==2 && AlarmHH>0)AlarmHH=AlarmHH-1;
if (setMode==0 && setAlarm==3 && AlarmMM>0)AlarmMM=AlarmMM-1;
if (setMode==0 && setAlarm==4 && AlarmSS>0)AlarmSS=AlarmSS-1;
if(hh<0)hh=23;
if(mm<0)mm=59;
if(ss<0)ss=59;
if(set_day<0)set_day=7;
if(dd<0)dd=31;
if(bb<0)bb=12;
if(yy<0)yy=2030;
rtc.setDOW(set_day);
}
}
void setTimer (){
//Alarm
if (setMode == 0 && setAlarm >0){
lcd.setCursor (0,0);
lcd.print("Alarm ");
if(mode==0){lcd.print("Deactivate");}
else{lcd.print("Activated ");}
lcd.setCursor (4,1);
lcd.print((AlarmHH/10)%10);
lcd.print(AlarmHH % 10);
lcd.print(":");
lcd.print((AlarmMM/10)%10);
lcd.print(AlarmMM % 10);
lcd.print(":");
lcd.print((AlarmSS/10)%10);
lcd.print(AlarmSS % 10);
}
}
void ReadEeprom () {
AlarmHH=EEPROM.read(1);
AlarmMM=EEPROM.read(2);
AlarmSS=EEPROM.read(3);
mode=EEPROM.read(4);
}
void WriteEeprom () {
EEPROM.write(1,AlarmHH);
EEPROM.write(2,AlarmMM);
EEPROM.write(3,AlarmSS);
EEPROM.write(4,mode);
}
I tried another clock with alarm, but I want to jump to set alarm without set hour and date .
//Libraries
#include <Wire.h>
#include "RTClib.h"
#include <LiquidCrystal.h>
#include <EEPROM.h>
#include "ClosedCube_HDC1080.h"
ClosedCube_HDC1080 hdc1080;
//Connections and constants
LiquidCrystal lcd(2, 3, 4, 5, 6, 7);//LiquidCrystal lcd(8,7,6,5,4,3); //LCD
RTC_DS1307 rtc; //DS1307 i2c
char daysOfTheWeek[7][12] = {"Sunday","Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
const int btSet = A0;
const int btAdj = A1;
const int btAlarm = A2;
const int buzzer = 8;
//const int shakeSensor = A3;
int temp = 0;
long interval = 300;
int melody[] = { 600, 800, 1000,1200 };
//Variables
int DD,MM,YY,H,M,S,set_state, adjust_state, alarm_state,AH,AM, shake_state;
int shakeTimes=0;
int i =0;
int btnCount = 0;
String sDD;
String sMM;
String sYY;
String sH;
String sM;
String sS;
String aH="12";
String aM="00";
String alarm = " ";
String stemp ;
String shdt;
String shdh;
String sdegreeChar;
long previousMillis = 0;
//Boolean flags
boolean setupScreen = false;
boolean alarmON=false;
boolean turnItOn = false;
void setup() {
//Init RTC and LCD library items
rtc.begin();
lcd.begin(16,2);
hdc1080.begin(0x40);
//Set outputs/inputs
pinMode(btSet,INPUT_PULLUP);
pinMode(btAdj,INPUT_PULLUP);
pinMode(btAlarm, INPUT_PULLUP);
pinMode(buzzer, OUTPUT);
//Check if RTC has a valid time/date, if not set it to 00:00:00 01/01/2018.
//This will run only at first time or if the coin battery is low.
if (! rtc.isrunning()) {
Serial.println("RTC is NOT running!");
// This line sets the RTC with an explicit date & time, for example to set
// January 1, 2018 at 00:00am you would call:
rtc.adjust(DateTime(2021, 12, 01, 00, 00, 0));
}
delay(100);
//Read alarm time from EEPROM memmory
AH=EEPROM.read(0);
AM=EEPROM.read(1);
//Check if the numbers that you read are valid. (Hours:0-23 and Minutes: 0-59)
if (AH>23){
AH=0;
}
if (AM>59){
AM=0;
}
}
void loop() {
temp = analogRead(A6);
temp = temp * 0.48828125;
stemp = temp;
shdt = hdc1080.readTemperature();
shdh = hdc1080.readHumidity();
sdegreeChar = String(char(223));
readBtns(); //Read buttons
getTimeDate(); //Read time and date from RTC
if (!setupScreen){
lcdPrint(); //Normanlly print the current time/date/alarm to the LCD
if (alarmON){
callAlarm(); // and check the alarm if set on
}
}
else{
timeSetup(); //If button set is pressed then call the time setup function
}
}
/*************** Functions ****************/
//Read buttons state
void readBtns(){
set_state = digitalRead(btSet);
adjust_state = digitalRead(btAdj);
alarm_state = digitalRead(btAlarm);
if(!setupScreen){
if (alarm_state==LOW){
if (alarmON){
alarm=" ";
alarmON=false;
}
else{
alarm="ALARM";
alarmON=true;
}
delay(500);
}
}
if (set_state==LOW){
if(btnCount<7){
btnCount++;
setupScreen = true;
if(btnCount==1){
lcd.clear();
lcd.setCursor(0,0);
lcd.print("------SET------");
lcd.setCursor(0,1);
lcd.print("-TIME and DATE-");
delay(2000);
lcd.clear();
}
}
else{
lcd.clear();
rtc.adjust(DateTime(YY, MM, DD, H, M, 0)); //Save time and date to RTC IC
EEPROM.write(0, AH); //Save the alarm hours to EEPROM 0
EEPROM.write(1, AM); //Save the alarm minuted to EEPROM 1
lcd.print("Saving....");
delay(2000);
lcd.clear();
setupScreen = false;
btnCount=0;
}
delay(500);
}
}
//Read time and date from rtc ic
void getTimeDate(){
if (!setupScreen){
DateTime now = rtc.now();
DD = now.day();
MM = now.month();
YY = now.year();
H = now.hour();
M = now.minute();
S = now.second();
}
//Make some fixes...
if (DD<10){ sDD = '0' + String(DD); } else { sDD = DD; }
if (MM<10){ sMM = '0' + String(MM); } else { sMM = MM; }
sYY=YY-2000;
if (H<10){ sH = '0' + String(H); } else { sH = H; }
if (M<10){ sM = '0' + String(M); } else { sM = M; }
if (S<10){ sS = '0' + String(S); } else { sS = S; }
if (AH<10){ aH = '0' + String(AH); } else { aH = AH; }
if (AM<10){ aM = '0' + String(AM); } else { aM = AM; }
}
//Print values to the display
void lcdPrint(){
//String line1 = sH+":"+sM+":"+sS+" | "+aH+":"+aM;
String line1 = sH+":"+sM+":"+sS+"|"+stemp+""+sdegreeChar+"C"+shdh+"%";//+stemp;
String line2 = sDD+"/"+sMM+"/"+sYY +"|"+aH+":"+aM+""+alarm;
lcd.setCursor(0,0);//First row
lcd.print(line1);
//lcd.setCursor(11,0);
//lcd.write(223);
//lcd.print("C");
lcd.setCursor(0,1); //Second row
lcd.print(line2);
}
//Setup screen
void timeSetup(){
int up_state = adjust_state;
int down_state = alarm_state;
if(btnCount<=5){
if (btnCount==1){ //Set Hour
lcd.setCursor(4,0);
lcd.print(">");
if (up_state == LOW){ //Up button +
if (H<23){
H++;
}
else {
H=0;
}
delay(350);
}
if (down_state == LOW){ //Down button -
if (H>0){
H--;
}
else {
H=23;
}
delay(350);
}
}
else if (btnCount==2){ //Set Minutes
lcd.setCursor(4,0);
lcd.print(" ");
lcd.setCursor(9,0);
lcd.print(">");
if (up_state == LOW){
if (M<59){
M++;
}
else {
M=0;
}
delay(350);
}
if (down_state == LOW){
if (M>0){
M--;
}
else {
M=59;
}
delay(350);
}
}
else if (btnCount==3){ //Set Day
lcd.setCursor(9,0);
lcd.print(" ");
lcd.setCursor(0,1);
lcd.print(">");
if (up_state == LOW){
if (DD<31){
DD++;
}
else {
DD=1;
}
delay(350);
}
if (down_state == LOW){
if (DD>1){
DD--;
}
else {
DD=31;
}
delay(350);
}
}
else if (btnCount==4){ //Set Month
lcd.setCursor(0,1);
lcd.print(" ");
lcd.setCursor(5,1);
lcd.print(">");
if (up_state == LOW){
if (MM<12){
MM++;
}
else {
MM=1;
}
delay(350);
}
if (down_state == LOW){
if (MM>1){
MM--;
}
else {
MM=12;
}
delay(350);
}
}
else if (btnCount==5){ //Set Year
lcd.setCursor(5,1);
lcd.print(" ");
lcd.setCursor(10,1);
lcd.print(">");
if (up_state == LOW){
if (YY<2999){
YY++;
}
else {
YY=2000;
}
delay(350);
}
if (down_state == LOW){
if (YY>2018){
YY--;
}
else {
YY=2999;
}
delay(350);
}
}
lcd.setCursor(5,0);
lcd.print(sH);
lcd.setCursor(8,0);
lcd.print(":");
lcd.setCursor(10,0);
lcd.print(sM);
lcd.setCursor(1,1);
lcd.print(sDD);
lcd.setCursor(4,1);
lcd.print("/");
lcd.setCursor(6,1);
lcd.print(sMM);
lcd.setCursor(9,1);
lcd.print("/");
lcd.setCursor(11,1);
lcd.print(sYY);
}
else{
setAlarmTime();
}
}
//Set alarm time
void setAlarmTime(){
int up_state = adjust_state;
int down_state = alarm_state;
String line2;
lcd.setCursor(0,0);
lcd.print("SET ALARM TIME");
if (btnCount==6){ //Set alarm Hour
if (up_state == LOW){
if (AH<23){
AH++;
}
else {
AH=0;
}
delay(350);
}
if (down_state == LOW){
if (AH>0){
AH--;
}
else {
AH=23;
}
delay(350);
}
line2 = " >"+aH+" : "+aM+" ";
}
else if (btnCount==7){ //Set alarm Minutes
if (up_state == LOW){
if (AM<59){
AM++;
}
else {
AM=0;
}
delay(350);
}
if (down_state == LOW){
if (AM>0){
AM--;
}
else {
AM=59;
}
delay(350);
}
line2 = " "+aH+" :>"+aM+" ";
}
lcd.setCursor(0,1);
lcd.print(line2);
}
void callAlarm(){
if (aM==sM && aH==sH && S>=0 && S<=2){
turnItOn = true;
}
if(alarm_state==LOW || shakeTimes>=6 || (M==(AM+5))){
turnItOn = false;
alarmON=true;
delay(500);
}
//if(analogRead(shakeSensor)>200){
// shakeTimes++;
// Serial.print(shakeTimes);
// delay(50);
// }
if (turnItOn){digitalWrite(buzzer, HIGH);
delay (500);
digitalWrite(buzzer, LOW);
}else{digitalWrite(buzzer, LOW);}
delay(100);
/*unsigned long currentMillis = millis();
if(currentMillis - previousMillis > interval) {
previousMillis = currentMillis;
tone(buzzer,melody[i],100);
i++;
if(i>3){i=0; };
}
}
else{
noTone(buzzer);
shakeTimes=0;
}*/
}
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