how to make it counts Hours???

Using Arduino Programming Questions
1

Please help me to make this counter code counts down hrs ???

#include <Wire.h>
//#include <LiquidCrystal.h>
#include <Keypad.h>


int controlPin = 13;
char currentTimeValue[6];
int currentState = 1;
int timerHr = 0;
int timerMin = 0;
int timerSec = 0;
int timerSeconds = 0;
int lpcnt = 0;

//define the keypad
const byte ROWS = 4; // four rows
const byte COLS = 3; // three columns
char keys[ROWS][COLS] =
{
{'1','2','3' },
{'4','5','6' },
{'7','8','9' },
{'*','0','#' }
};
byte rowPins[ROWS] = {5, 6, 7, 8};
byte colPins[COLS] = {2, 3, 4};
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
//LiquidCrystal lcd(0x3F,20,4); // set the LCD address to 0x27 for a 16 chars and 2 line display

void setup()
{
 //lcd.init(); // initialize the lcd
 //
 // Print a message to the LCD.
 // lcd.backlight();
 Serial.begin(9600);
 //display main screen
 displayCodeEntryScreen();

 //setup and turn off relay
 pinMode(controlPin, OUTPUT);
 digitalWrite(controlPin, LOW);
 
 //setup default time to 00:00
 currentTimeValue[0]='0';
 currentTimeValue[1]='0';
 currentTimeValue[2]='0';
 currentTimeValue[3]='0';
 currentTimeValue[4]='0';
 currentTimeValue[5]='0';

 showEnteredTime();
}

void loop()
{
 int l;
 char tempVal[3];
 char key = keypad.getKey();

 //key pressed and state is 1
 if (int(key) != 0 and currentState == 1) {

 switch (key) {
 case '*':
 relayStatus(false);
 currentTimeValue[0]='0';
 currentTimeValue[1]='0';
 currentTimeValue[2]='0';
 currentTimeValue[3]='0';
 currentTimeValue[4]='0';
 currentTimeValue[5]='0';
 showEnteredTime();
 currentState = 1;

 lpcnt = 0;
 timerSeconds = 0;
 break;

 case '#':
 tempVal[0] = currentTimeValue[0];
 tempVal[1] = currentTimeValue[1];
 tempVal[2] = 0;

 timerHr = atol(tempVal) * 3600;

 tempVal[0] = currentTimeValue[2];
 tempVal[1] = currentTimeValue[3];
 tempVal[2] = 0;

 timerMin = atol(tempVal) * 60;

 tempVal[0] = currentTimeValue[4];
 tempVal[1] = currentTimeValue[5];
 tempVal[2] = 0;

 timerSec = atol(tempVal);

 timerSeconds = timerHr + timerMin + timerSec; 
 currentState = 2;
 break;

 default:
 currentTimeValue[0] = currentTimeValue[1];
 currentTimeValue[1] = currentTimeValue[2];
 currentTimeValue[2] = currentTimeValue[3];
 currentTimeValue[3] = currentTimeValue[4];
 currentTimeValue[4] = currentTimeValue[5];
 currentTimeValue[5] = key;
 showEnteredTime();
 break;
 }
 }

 if (currentState == 2) {
 if (int(key) != 0) {
 if (key == '*') {
 relayStatus(false);
 displayCodeEntryScreen();
 currentTimeValue[0]='0';
 currentTimeValue[1]='0';
 currentTimeValue[2]='0';
 currentTimeValue[3]='0';
 currentTimeValue[4]='0';
 currentTimeValue[5]='0';
 showEnteredTime();
 currentState = 1;
 lpcnt = 0;
 timerSeconds = 0;
 }
 } 
 
 else {
 if (lpcnt > 9) {
 lpcnt = 0;
 --timerSeconds;
 showCountdown();

 if (timerSeconds <= 0) {
 currentState = 1;
 relayStatus(false);
 displayCodeEntryScreen();
 showEnteredTime();
 } 
 
 else {
 relayStatus(true);
 }
 }

 ++lpcnt;
 delay(100);
 }
 }
}

void showEnteredTime()
{
 Serial.print(currentTimeValue[0]);
 Serial.print(currentTimeValue[1]);
 Serial.print(":");
 Serial.print(currentTimeValue[2]);
 Serial.print(currentTimeValue[3]);
 Serial.print(":");
 Serial.print(currentTimeValue[4]);
 Serial.print(currentTimeValue[5]);
 Serial.println("");

}

void relayStatus(bool state)
{
 if (state)
 digitalWrite(controlPin, HIGH);
 else
 digitalWrite(controlPin, LOW);
}

void showCountdown()
{
 char timest[6];
 Serial.println("COUNTING DOWN");
 sprintf(timest,"%d:%.2d", (timerSeconds/60), (timerSeconds - ((timerSeconds/60)*60)));
 Serial.print(timest);
 Serial.println("");
}

void displayCodeEntryScreen()
{
 clearScreen();
 Serial.println("Let's Make It Count");
 Serial.println("Down Time...");
 Serial.println("Enter Time hh:mm:ss");
}

void clearScreen()
{
 Serial.print(" ");
 Serial.print(" ");
 Serial.print(" ");
 Serial.print(" ");
}
2

Got it :slight_smile:

void showCountdown()
{
 char timest[6];
 Serial.println("COUNTING DOWN");
 sprintf(timest,"%.2d:%.2d:%.2d", (timerSeconds/3600), ((timerSeconds/60) - (timerSeconds/3600)*60), (timerSeconds - ((timerSeconds/60)*60)));
 Serial.print(timest);
 Serial.println("");
}