Arduino: LCD 1602 very Simple Clock - Revision history

Unknown user at 10:42, 1 April 2023

2023-04-01T10:42:22Z

← Older revision		Revision as of 10:42, 1 April 2023
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	/* Arduino 'Clock' with LCD (~~16x2~~) I2C.		/* Arduino 'Clock' with LCD (20x4) I2C.

	This I2C LCD backpack contains the PCF8574 port-expander		This I2C LCD backpack contains the PCF8574 port-expander
	IC. Beware that this sketch can work with backpacks that		IC. Beware that this sketch can work with backpacks that
	contains this IC, but may not work with variations.		contains this IC, but may not work with variations.

	Components:		Components:
Line 27:		Line 27:
	int day, d, m, yr;		int day, d, m, yr;
	// char *DAYS[] = { "Mon", "Tues", "Wed", "Thurs", "Fri", "Sat", "Sun" };		// char *DAYS[] = { "Mon", "Tues", "Wed", "Thurs", "Fri", "Sat", "Sun" };
	// char *MONTHS[] = { "Jan", "Feb", "Mar", "Apr", "May", "June", "July", "Aug", "Sep", "Oct", "Nov", "Dec" };		// char *MONTHS[] = { "Jan", "Feb", "Mar", "Apr", "May", "June", "July", "Aug", "Sep", "Oct", "Nov", "Dec" };

	String DAYS[] = { "Mon", "Tues", "Wed", "Thurs", "Fri", "Sat", "Sun" };		String DAYS[] = { "Mon", "Tues", "Wed", "Thurs", "Fri", "Sat", "Sun" };
	String MONTHS[] = { "Jan", "Feb", "Mar", "Apr", "May", "June", "July", "Aug", "Sep", "Oct", "Nov", "Dec" };		String MONTHS[] = { "Jan", "Feb", "Mar", "Apr", "May", "June", "July", "Aug", "Sep", "Oct", "Nov", "Dec" };


	void setup()		void setup()
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	{		{
	//...Display Time to LCD...		//...Display Time to LCD...
	lcd.setCursor(0, 1);		lcd.setCursor(3, 1);
	lcd.print("~~Time:~~ ");		// lcd.print(" ");
	printolcd(Hrs);		printolcd(Hrs);
	lcd.print(":");		lcd.print(":");
Line 53:		Line 54:
	//...Clock starts...		//...Clock starts...
	Secs++;		Secs++;
	if (Secs == 60) {		if (Secs == 60) {
	Secs = 0;		Secs = 0;
	Mins++;		Mins++;
Line 65:		Line 66:
	}		}
	if (Hrs == 12 && Mins == 00 && Secs == 00) {		if (Hrs == 12 && Mins == 00 && Secs == 00) {
	if (AmPm == "AM") {		if (AmPm == " AM") {
	AmPm = "PM";		AmPm = " PM";
	}		}
	else {		else {
	AmPm = "AM";		AmPm = " AM";
	d++;		d++;
	reset_dom(m); // reset the day to 1 when the days of the month exceed it's limit		reset_dom(m); // reset the day to 1 when the days of the month exceed it's limit

	//...Reset LCD row 0 and update date...		//...Reset LCD row 0 and update date...
Line 88:		Line 89:
	}		}
	delay(a_sec); // delay acts as the clock second hand		delay(a_sec); // delay acts as the clock second hand
	}		}


	///////////////////////////////////////		///////////////////////////////////////
	////Initialise the 'clock' settings////		////Initialise the 'clock' settings////
	///////////////////////////////////////		///////////////////////////////////////
	void clkInit() {		void clkInit() {

	Serial.println("What is the day today? (1 - 7)");		Serial.println("What is the day today? (1 - 7)");
	Serial.println("\t(1) Monday\n\t(2) Tuesday\n\t(3) Wednesday\n\t(4) Thursday\n\t(5) Friday\n\t(6) Saturday\n\t(7) Sunday");		Serial.println("\t(1) Monday\n\t(2) Tuesday\n\t(3) Wednesday\n\t(4) Thursday\n\t(5) Friday\n\t(6) Saturday\n\t(7) Sunday");
	while (Serial.available() == 0) {}; // wait for user input		while (Serial.available() == 0) {}; // wait for user input
	day = Serial.parseInt(); // store what day is today in integer variable 'day'		day = Serial.parseInt(); // store what day is today in integer variable 'day'

	delay(500);		delay(500);
Line 118:		Line 119:
	Serial.print(yr);		Serial.print(yr);

	delay(500);		delay(500);

	Serial.print("\n\n\tToday is ");		Serial.print("\n\n\tToday is ");
	Serial.print(DAYS[day - 1]);		Serial.print(DAYS[day - 1]);
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	Serial.print("\n\nIs it - (1)AM or (2)PM ?");		Serial.print("\n\nIs it - (1)AM or (2)PM ?");
	while (Serial.available() == 0) {};		while (Serial.available() == 0) {};
	ampm = Serial.parseInt();		ampm = Serial.parseInt();

	delay(500);		delay(500);

	if (ampm == 1) {		if (ampm == 1) {
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	AmPm = "PM";		AmPm = "PM";
	Serial.print("\nClock set to PM\n\n");		Serial.print("\nClock set to PM\n\n");
	}		}

	~~delay(500);~~

			delay(500);

	Serial.print("Input Hours (1 - 12) : ");		Serial.print("Input Hours (1 - 12) : ");
	while (Serial.available() == 0) {} // wait till the user inputs data		while (Serial.available() == 0) {} // wait till the user inputs data
	Hrs = Serial.parseInt();		Hrs = Serial.parseInt();
	printoserial(Hrs);		printoserial(Hrs);

	delay(500);		delay(500);

	Serial.print("\nInput Minutes (0 - 59) : ");		Serial.print("\nInput Minutes (0 - 59) : ");
	while (Serial.available() == 0) {} // wait till the user inputs data		while (Serial.available() == 0) {} // wait till the user inputs data
	Mins = Serial.parseInt();		Mins = Serial.parseInt();
	printoserial(Mins);		printoserial(Mins);

	delay(500);		delay(500);

	~~Serial.print("\n\n\tClock set to : "~~);

			Serial.print("\n\n\tClock set to : ");
	//...Display time to Serial Monitor...		//...Display time to Serial Monitor...
	printoserial(Hrs);		printoserial(Hrs);
	Serial.print(":");		Serial.print(":");
	printoserial(Mins);		printoserial(Mins);
	Serial.print(AmPm);		Serial.print(AmPm);

	//... Display Date to LCD...		//... Display Date to LCD...
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	lcd.print(yr);		lcd.print(yr);
	}		}


	//////////////////////////////////////////////////////////////////////////		//////////////////////////////////////////////////////////////////////////
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	Serial.print(val);		Serial.print(val);
	}		}
	}		}

	///////////////////////////////////////////////////////////////		///////////////////////////////////////////////////////////////
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	lcd.print(val);		lcd.print(val);
	}		}
	}		}

	void reset_dom(int var) {		void reset_dom(int var) {

Unknown user: Created page with " /* Arduino 'Clock' with LCD (16x2) I2C. This I2C LCD backpack contains the PCF8574 port-expander IC. Beware that this sketch can work with backpacks that contai..."

2023-03-30T18:39:12Z

Created page with " /* Arduino 'Clock' with LCD (16x2) I2C. This I2C LCD backpack contains the PCF8574 port-expander IC. Beware that this sketch can work with backpacks that contai..."

New page

/* Arduino 'Clock' with LCD (16x2) I2C.

This I2C LCD backpack contains the PCF8574 port-expander
IC. Beware that this sketch can work with backpacks that
contains this IC, but may not work with variations.

Components:
- Arduino Uno
- LCD I2C (20x4)

Libraries:
- LiquidCrystal_I2C library

Created on 25 June 2022 by c010rblind3ngineer
*/

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

const int a_sec = 900; // clock second hand

int Hrs, Mins;
int Secs = 0;
String AmPm; // to store the string data to display 'AM' or 'PM'
int ampm; // to store user input
int day, d, m, yr;
// char *DAYS[] = { "Mon", "Tues", "Wed", "Thurs", "Fri", "Sat", "Sun" };
// char *MONTHS[] = { "Jan", "Feb", "Mar", "Apr", "May", "June", "July", "Aug", "Sep", "Oct", "Nov", "Dec" };

String DAYS[] = { "Mon", "Tues", "Wed", "Thurs", "Fri", "Sat", "Sun" };
String MONTHS[] = { "Jan", "Feb", "Mar", "Apr", "May", "June", "July", "Aug", "Sep", "Oct", "Nov", "Dec" };

void setup()
{
Serial.begin(9600);
lcd.init();
lcd.backlight();
clkInit();
}
void loop()
{
//...Display Time to LCD...
lcd.setCursor(0, 1);
lcd.print("Time: ");
printolcd(Hrs);
lcd.print(":");
printolcd(Mins);
lcd.print(":");
printolcd(Secs);
lcd.print(AmPm);

//...Clock starts...
Secs++;
if (Secs == 60) {
Secs = 0;
Mins++;
}
if (Mins == 60) {
Mins = 0;
Hrs++;
}
if (Hrs == 13) {
Hrs = 1;
}
if (Hrs == 12 && Mins == 00 && Secs == 00) {
if (AmPm == "AM") {
AmPm = "PM";
}
else {
AmPm = "AM";
d++;
reset_dom(m); // reset the day to 1 when the days of the month exceed it's limit

//...Reset LCD row 0 and update date...
lcd.setCursor(0, 0);
lcd.print(" ");
lcd.setCursor(0, 0);
lcd.print(DAYS[day]); // mon, tues, wed... etc.
lcd.print(", ");
printolcd(d);
lcd.print(" ");
lcd.print(MONTHS[m - 1]);
lcd.print(" ");
lcd.print(yr);
day++;
}
}
delay(a_sec); // delay acts as the clock second hand
}

///////////////////////////////////////
////Initialise the 'clock' settings////
///////////////////////////////////////
void clkInit() {

Serial.println("What is the day today? (1 - 7)");
Serial.println("\t(1) Monday\n\t(2) Tuesday\n\t(3) Wednesday\n\t(4) Thursday\n\t(5) Friday\n\t(6) Saturday\n\t(7) Sunday");
while (Serial.available() == 0) {}; // wait for user input
day = Serial.parseInt(); // store what day is today in integer variable 'day'

delay(500);

Serial.println("\nWhat is today's date?");
Serial.print("Day (1 - 31): ");
while (Serial.available() == 0) {}; // wait for user input
d = Serial.parseInt(); // store day in integer variable 'd'
printoserial(d);

Serial.print("\nMonth (1 - 12): ");
while (Serial.available() == 0) {}; // wait for user input
m = Serial.parseInt(); // store month in integer variable 'm'
Serial.print(MONTHS[m - 1]);
Serial.print("\nYear (YYYY): ");
while (Serial.available() == 0) {}; // wait for user input
yr = Serial.parseInt(); // store year in integer variable 'yr'
Serial.print(yr);

delay(500);

Serial.print("\n\n\tToday is ");
Serial.print(DAYS[day - 1]);
Serial.print(", ");
printoserial(d);
Serial.print(" ");
Serial.print(MONTHS[m - 1]);
Serial.print(" ");
Serial.print(yr);
Serial.print("\n\nIs it - (1)AM or (2)PM ?");
while (Serial.available() == 0) {};
ampm = Serial.parseInt();

delay(500);

if (ampm == 1) {
AmPm = "AM";
Serial.print("\nClock set to AM\n\n");
}
if (ampm == 2) {
AmPm = "PM";
Serial.print("\nClock set to PM\n\n");
}

delay(500);

Serial.print("Input Hours (1 - 12) : ");
while (Serial.available() == 0) {} // wait till the user inputs data
Hrs = Serial.parseInt();
printoserial(Hrs);

delay(500);

Serial.print("\nInput Minutes (0 - 59) : ");
while (Serial.available() == 0) {} // wait till the user inputs data
Mins = Serial.parseInt();
printoserial(Mins);

delay(500);

Serial.print("\n\n\tClock set to : ");

//...Display time to Serial Monitor...
printoserial(Hrs);
Serial.print(":");
printoserial(Mins);
Serial.print(AmPm);

//... Display Date to LCD...
lcd.setCursor(0, 0);
lcd.print(DAYS[day - 1]);
lcd.print(", ");
printolcd(d);
lcd.print(" ");
lcd.print(MONTHS[m - 1]);
lcd.print(" ");
lcd.print(yr);
}

//////////////////////////////////////////////////////////////////////////
////To put an extra '0' infront of the variables on the Serial Monitor////
//////////////////////////////////////////////////////////////////////////
void printoserial(int val)
{
if (val < 10) {
Serial.print("0");
Serial.print(val);
}
else {
Serial.print(val);
}
}

///////////////////////////////////////////////////////////////
////To put an extra '0' infront of the variables on the LCD////
///////////////////////////////////////////////////////////////
void printolcd(int val)
{
if (val < 10) {
lcd.print("0");
lcd.print(val);
}
else {
lcd.print(val);
}
}

void reset_dom(int var) {
switch (var) {
case 1: // Jan - 31 days
if (d == 32) {
d = 1;
m++;
}
break;
case 2: // Feb - 28 days
if (d == 29) {
d = 1;
m++;
}
break;
case 3: // March - 31 days
if (d == 32) {
d = 1;
m++;
}
break;
case 4: // April - 30 days
if (d == 31) {
d = 1;
m++;
}
break;
case 5: // May - 31 days
if (d == 32) {
d = 1;
m++;
}
break;
case 6: // June - 30 days
if (d == 31) {
d = 1;
m++;
}
break;
case 7: // July - 31 days
if (d == 32) {
d = 1;
m++;
}
break;
case 8: // August - 31 days
if (d == 32) {
d = 1;
m++;
}
break;
case 9: // September - 30 days
if (d == 31) {
d = 1;
m++;
}
break;
case 10: // October - 31 days
if (d == 32) {
d = 1;
m++;
}
break;
case 11: // November - 30 days
if (d == 31) {
d = 1;
m++;
}
break;
case 12: // December - 31 days
if (d == 32) {
d = 1;
m++;
}
break;
}
}