Arduino DS1302 realtime clock time date user updater code

A single IC real-time clock utilizing the DS1302 module has been successfully developed. The implemented code enables automatic updating of time and date, along with user input functionality facilitated by three buttons.

I used virtuabotixRTC to clock run.. Enjoy!

Hope you useful this.

Code is here by :


#include <virtuabotixRTC.h> //SCLK -> 6, I/O -> 7, CE -> 8 virtuabotixRTC myRTC(10, 11, 12); // include the library code LCD #include <LiquidCrystal.h> #define btnUp A1 #define btnDown A0 #define clkBatt A3 // initialize the library with the numbers of the interface pins LiquidCrystal lcd(8, 9, 4, 5, 6, 7); int setButtonPress; int btnUpV; int btnDownV; int settingsLast = LOW; byte count = 0; boolean setDays = false; boolean setMonth = false; boolean setYear = false; boolean setHours = false; boolean setMinutes = false; unsigned long previousMillis = 0; // will store last time LED was updated const long interval = 5000; // interval at which to blink (milliseconds) // constants won't change : unsigned int backlightOn = 0; int ledState = LOW; void setup() { pinMode(2, OUTPUT); pinMode(3, OUTPUT); pinMode(A2, INPUT); pinMode(btnUp, INPUT); pinMode(btnDown, INPUT); pinMode(clkBatt, INPUT); digitalWrite(3, LOW); digitalWrite(2, HIGH); lcd.begin(16, 2); // Serial.begin(9600); lcd.setCursor(1, 0); lcd.print("Solitra Power"); lcd.setCursor(4, 1); lcd.print("Pvt Ltd"); delay(5000); clearLCD(); digitalWrite(2, LOW); } void loop() { myRTC.updateTime(); processRelay(); setButtonPress = digitalRead(A2); btnUpV = digitalRead(btnUp); btnDownV = digitalRead(btnDown); if (setButtonPress == HIGH) setButton(); clockDisplay(); lcdLight(); batteryCheck(); if(backlightOn > 0){ unsigned long currentMillis = millis(); if (currentMillis - previousMillis >= interval) { // save the last time you blinked the LED previousMillis = currentMillis; // if the LED is off turn it on and vice-versa: if (ledState == LOW) { ledState = HIGH; }else { ledState = LOW; backlightOn = 0; } // set the LED with the ledState of the variable: digitalWrite(2, ledState); } } if (setDays == true) { lcd.setCursor(0, 0); lcd.print(" -"); int currentDay = myRTC.dayofmonth; int currentMinutes = myRTC.minutes; int currentHours = myRTC.hours; int currentMonth = myRTC.month; int currentYear = myRTC.year; //value up if(btnUpV == HIGH) { if (currentDay < 31){ currentDay++;} else if (currentDay == 31) { currentDay = 1; } }//value down if(btnDownV == HIGH) { if (currentDay > 1){ currentDay--;} else if (currentDay == 1) { currentDay = 31; } } myRTC.setDS1302Time(00, currentMinutes, currentHours, 1, currentDay, currentMonth, currentYear); delay(100); lcd.setCursor(0, 0); if (currentDay < 10) {lcd.print("0");} lcd.print(currentDay); } if (setMonth == true) { lcd.setCursor(3, 0); lcd.print(" -"); int currentDay = myRTC.dayofmonth; int currentMinutes = myRTC.minutes; int currentHours = myRTC.hours; int currentMonth = myRTC.month; int currentYear = myRTC.year; //value up if(btnUpV == HIGH) { if (currentMonth < 12){ currentMonth++;} else if (currentMonth == 12) { currentMonth = 1; } }//value down if(btnDownV == HIGH) { if (currentMonth > 1){ currentMonth--;} else if (currentMonth == 1) { currentMonth = 12; } } myRTC.setDS1302Time(00, currentMinutes, currentHours, 1, currentDay, currentMonth, currentYear); delay(100); lcd.setCursor(3, 0); if (currentMonth < 10) {lcd.print("0");} lcd.print(currentMonth); } if (setYear == true) { lcd.setCursor(6, 0); lcd.print(" "); int currentDay = myRTC.dayofmonth; int currentMinutes = myRTC.minutes; int currentHours = myRTC.hours; int currentMonth = myRTC.month; int currentYear = myRTC.year; //value up if(btnUpV == HIGH) { if (currentYear < 2030){ currentYear++;} else if (currentYear == 2030) { currentYear = 2017; } }//value down if(btnDownV == HIGH) { if (currentYear > 2000){ currentYear--;} else if (currentYear == 2000) { currentYear = 2030; } } myRTC.setDS1302Time(00, currentMinutes, currentHours, 1, currentDay, currentMonth, currentYear); delay(100); lcd.setCursor(6, 0); lcd.print(currentYear); } if (setHours == true) { lcd.setCursor(0, 1); lcd.print(" :"); int currentDay = myRTC.dayofmonth; int currentMinutes = myRTC.minutes; int currentHours = myRTC.hours; int currentMonth = myRTC.month; int currentYear = myRTC.year; //value up if(btnUpV == HIGH) { if (currentHours < 23){ currentHours++;} else if (currentHours == 23) { currentHours = 0; } }//value down if(btnDownV == HIGH) { if (currentHours > 0){ currentHours--;} else if (currentHours == 0) { currentHours = 23; } } myRTC.setDS1302Time(00, currentMinutes, currentHours, 1, currentDay, currentMonth, currentYear); delay(100); lcd.setCursor(0, 1); if (currentHours < 10) {lcd.print("0");} lcd.print(currentHours); } if (setMinutes == true) { lcd.setCursor(3, 1); lcd.print(" :"); int currentDay = myRTC.dayofmonth; int currentMinutes = myRTC.minutes; int currentHours = myRTC.hours; int currentMonth = myRTC.month; int currentYear = myRTC.year; //value up if(btnUpV == HIGH) { if (currentMinutes < 59){ currentMinutes++;} else if (currentMinutes == 59) { currentMinutes = 0; } }//value down if(btnDownV == HIGH) { if (currentMinutes > 0){ currentMinutes--;} else if (currentMinutes == 0) { currentMinutes = 59; } } myRTC.setDS1302Time(00, currentMinutes, currentHours, 1, currentDay, currentMonth, currentYear); delay(100); lcd.setCursor(3, 1); if (currentMinutes < 10) {lcd.print("0");} lcd.print(currentMinutes); } } // loop over void clockDisplay() { if (setDays == false) { lcd.setCursor(0, 0); if (myRTC.dayofmonth < 10) { lcd.print("0"); } lcd.print(myRTC.dayofmonth); lcd.print("-"); } lcd.setCursor(3, 0); if (myRTC.month < 10) { lcd.print("0"); } lcd.print(myRTC.month); lcd.print("-"); lcd.setCursor(6, 0); lcd.print(myRTC.year); lcd.setCursor(0, 1); if (myRTC.hours < 10) { lcd.print("0"); } lcd.print(myRTC.hours); lcd.print(":"); lcd.setCursor(3, 1); if (myRTC.minutes < 10) { lcd.print("0"); } lcd.print(myRTC.minutes); lcd.print(":"); lcd.setCursor(6, 1); if (myRTC.seconds < 10) { lcd.print("0"); } lcd.print(myRTC.seconds); delay(100); } //countrol the relay void processRelay() { if (myRTC.hours > 5 && myRTC.hours < 18) { digitalWrite(3, HIGH); } else digitalWrite(3, LOW); } void setButton() { if (count < 6) { //lcd.setCursor(9, 1); //lcd.print(count); if (count == 0) { //date set setMinutes = false; setYear = false; setHours = false; setMonth = false; setDays = true; } if (count == 1) { //month set setMinutes = false; setYear = false; setHours = false; setDays = false; setMonth = true; } if (count == 2) { //year set setMinutes = false; setDays = false; setHours = false; setMonth = false; setYear = true; } if (count == 3) { //hours set setMinutes = false; setDays = false; setMonth = false; setYear = false; setHours = true; } if (count == 4) { //minutes set setDays = false; setMonth = false; setYear = false; setHours = false; setMinutes = true; } if (count == 5) { //update clock setDays = false; setMonth = false; setYear = false; setHours = false; setMinutes = false; clockDisplay(); } count += 1; delay(100); } else count = 0; // if(buttonCount ==5) buttonCount = 0; } void clearLCD() { lcd.setCursor(0, 0); lcd.print(" "); lcd.setCursor(0, 1); lcd.print(" "); lcd.setCursor(0, 0); } void lcdLight() { if (digitalRead(A2) == HIGH || digitalRead(btnUp) == HIGH || digitalRead(btnDown) == HIGH){ //digitalWrite(2, HIGH); backlightOn = 1; } //else backlightOn = 0; //digitalWrite(2, LOW); } void batteryCheck() { int sensorValue = analogRead(clkBatt); float battvoltage = sensorValue * (5.0 / 1023.0); if(battvoltage < 2.7){ clearLCD(); lcd.setCursor(1, 0); lcd.print("Battery low"); delay(500); clearLCD(); //Serial.println(battvoltage); } }