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/*
* TimeRTCLogger.pde
* example code illustrating adding and subtracting Time.
*
* this sketch logs pin state change events
* the time of the event and time since the previous event is calculated and sent to the serial port.
*/
#include <Time.h>
#include <Wire.h>
#include <DS1307RTC.h> // a basic DS1307 library that returns time as a time_t
const int nbrInputPins = 6; // monitor 6 digital pins
const int inputPins[nbrInputPins] = {2,3,4,5,6,7}; // pins to monitor
boolean state[nbrInputPins] ; // the state of the monitored pins
time_t prevEventTime[nbrInputPins] ; // the time of the previous event
void setup() {
Serial.begin(9600);
setSyncProvider(RTC.get); // the function to sync the time from the RTC
for(int i=0; i < nbrInputPins; i++){
pinMode( inputPins[i], INPUT);
// digitalWrite( inputPins[i], HIGH); // uncomment these lines if
// state[i] = HIGH; // pull-up resistors are wanted
}
}
void loop()
{
for(int i=0; i < nbrInputPins; i++)
{
boolean val = digitalRead(inputPins[i]);
if(val != state[i])
{
time_t duration = 0; // the time since the previous event
state[i] = val;
time_t timeNow = now();
if(prevEventTime[i] > 0)
// if this was not the first state change, calculate the time from the previous change
duration = duration = timeNow - prevEventTime[i];
logEvent(inputPins[i], val, timeNow, duration ); // log the event
prevEventTime[i] = timeNow; // store the time for this event
}
}
}
void logEvent( int pin, boolean state, time_t timeNow, time_t duration)
{
Serial.print("Pin ");
Serial.print(pin);
if( state == HIGH)
Serial.print(" went High at ");
else
Serial.print(" went Low at ");
showTime(timeNow);
if(duration > 0){
// only display duration if greater than 0
Serial.print(", Duration was ");
showDuration(duration);
}
Serial.println();
}
void showTime(time_t t){
// display the given time
Serial.print(hour(t));
printDigits(minute(t));
printDigits(second(t));
Serial.print(" ");
Serial.print(day(t));
Serial.print(" ");
Serial.print(month(t));
Serial.print(" ");
Serial.print(year(t));
}
void printDigits(int digits){
// utility function for digital clock display: prints preceding colon and leading 0
Serial.print(":");
if(digits < 10)
Serial.print('0');
Serial.print(digits);
}
void showDuration(time_t duration){
// prints the duration in days, hours, minutes and seconds
if(duration >= SECS_PER_DAY){
Serial.print(duration / SECS_PER_DAY);
Serial.print(" day(s) ");
duration = duration % SECS_PER_DAY;
}
if(duration >= SECS_PER_HOUR){
Serial.print(duration / SECS_PER_HOUR);
Serial.print(" hour(s) ");
duration = duration % SECS_PER_HOUR;
}
if(duration >= SECS_PER_MIN){
Serial.print(duration / SECS_PER_MIN);
Serial.print(" minute(s) ");
duration = duration % SECS_PER_MIN;
}
Serial.print(duration);
Serial.print(" second(s) ");
}
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