Arduino-Alarm Logic
The following code is the adaptation of the Python code found here. The code below has limited the loop so that the weekends generated are only within the year of interest. After having completed the period of interest, it just flashes the LED using the Blink sketch. An earlier version did not have this limitation and rushed off to find all of the weekends (successfully) out to the limits of what the unsigned long
variables could hold.
Related Project Pages
The sketch below can be downloaded from here: LogicTester.ino
/*
The following is a program to develop the logic for setting and triggering the alarms
in the Arduino Timer Project
The array used is the same array as the Arduino gets from the SD Card.
*/
unsigned long times[] = {1386347400,1386563400,1387548000,1389155400,1389967200,1390278600,1397743200,1398141000,1398348000,1398659400,1401458400,1401769800,1414159200,1414470600};
int NoF = 14; // This is the number ofcomponents in the array. This figure is generated in the
// array loading section of the project.
unsigned long NowTime=1386347000; // This is the current time in Unix Time format. This will come from the RTC
boolean StatusFlag = false; // Is the HWC enabled or not?
boolean RedLED = false; //LED pin control.This will be used to indicate the Red LED state for available times exceeded. Basically if this goes off you will need to put more dates in the SD Card
boolean YellowLED=false; //Yellow LED indicator to show that the HWC element is enabled.
boolean GreenLED=false; //Green LED indicater to show that the system is working.
int InDexer = 2; //InDexer is the array pointer that indicates which is the next holiday period to be used.
unsigned long AlarmDateOn=0; //This is justa holder to help with debugging - real alarms will be used instead when coded for real
unsigned long AlarmDateOff=0; //This is another holder to help with debugging - real alarms will be used instead when coded for real
boolean Completed = false; //This just signals completion of the loop.
int ledPin = 13; // LED connected to digital pin 13
void setup()
{
pinMode(ledPin, OUTPUT);
//Open Serial Communications and wait for the port to open:
Serial.begin(9600);
// Make all weekend alarm dates and holiday period pointers current.
Serial.println(NowTime);
Serial.print(times[0]),Serial.print(","),Serial.println(times[1]);
if (times[0]< NowTime) // The following updates the weekend dates to be in the future.
{
while (times[0]<NowTime)
{
times[0]=times[0]+604800; // Add a week's worth of seconds
times[1]=times[1]+604800;
}
}
// Step through the times[] array components to find the next START of the holiday period.
while (times[InDexer]<NowTime) // Check to see if the date is in the future.
{
InDexer = InDexer + 2; // Adding two means we look ONLY at the start dates.
if (InDexer >= NoF-1) // Have we exceeded the list? If so enable the error light
{
RedLED = true;
break;
}
}
// Report the next weekend and whether the list of special breaks has been exceeded.
Serial.print(times[0]);Serial.print(",");Serial.println(times[1]);
Serial.print(RedLED);
Serial.print(InDexer); //This indicates where in the list of holiday breaks we are looking and the next holidays.
Serial.print("Holiday Alarm");Serial.print(times[InDexer]);Serial.println(times[InDexer+1]);
}
void loop()
{
// The following section will loop the NowTime to simulate the info from the RTC.
// To carry over into this new section the up-to-date InDexer will be used to work out
// Which Holiday periods are coming up and which alarm goes next. InDexer is a Global Variable.
// The Weekends will be set to skip forward if it turns out that a holiday period is
// coming up next.
// Although the loop allows us to repeatedly loop through the process
// and does give the right dates for weekends many years in the future
// we will limit the loop to being just a first year so that we can examine the
// holiday dates. Once it is done we will set the LED to flash so that the
// loop is kept occupied.
while(Completed == false) //This limits the looping.
{
unsigned long dd = AlarmDateOn; //This is justa holder to help with debugging - these carry the old values of the alarms
unsigned long ee = AlarmDateOff; //This is another holder to help with debugging - these carry the old values of the alarms
if (times[0]> times[InDexer] && RedLED == true) // It would be a holiday but the list has been exceeded
{
AlarmDateOn = times[0]; // In the Arduino this will load the date into the Alarm function
AlarmDateOff = times[1];
}
else if (times[0]>times[InDexer] && RedLED == false) // The next item is a holiday and the list is OK.
{
AlarmDateOn = times[InDexer];
AlarmDateOff = times[InDexer+1]; // Loads the Holiday times into the Alarm function
while (times[0]< times[InDexer+1])
{
times[0]=times[0]+604800; //Advance the weekend dates to be clear of the holiday
times[1]=times[1]+604800;
}
}
else //Normal Weekend
{
AlarmDateOn = times[0]; //In the Arduino this will load the date into the Alarm function
AlarmDateOff = times[1];
}
if (NowTime > times[1]) // When a weekend start has passed jump forward to the next one. We shall have to check that the logic
// does not cause the weekend close off alarm to be overwritten.
{
times[0]=times[0]+604800; // Advance the weekend dates to the next one once the
times[1]=times[1]+604800; // current weekend is finished
}
if (NowTime > times[InDexer+1]) //When a holiday is in progress the pointer needs to be advanced.
{
InDexer = InDexer+2; //Advance the pointer the the next holiday once current one
//finished.
if (InDexer >= NoF-1) //Have we exceeded the list? If so enable the error light
{
RedLED = true; //But carry on by setting InDexer to last good figure
InDexer = InDexer - 2;
}
}
// The following is to simulate the operation of the alarms. If needed we can print the Status flags to the serial port.
// We will need to look at the looptime step size if we do implement this as it is likely to miss the reporting times.
if (NowTime == AlarmDateOn)
{
StatusFlag = true;
YellowLED = true;
}
if (NowTime == AlarmDateOff)
{
StatusFlag = false;
YellowLED = false;
}
if (dd != AlarmDateOn) //The following lines are to produce a new dump of the alarms
{
Serial.println(AlarmDateOn); // Whenever a date change is triggered - print the new alarm settings.
}
if (ee != AlarmDateOff)
{
Serial.println(AlarmDateOff);
}
NowTime = NowTime + 500;
if(NowTime >= 1419309000)
{
Completed = true;
}
}
digitalWrite(ledPin, HIGH); // set the LED on
delay(1000); // wait for a second
digitalWrite(ledPin, LOW); // set the LED off
delay(1000); // wait for a second
}
This is a subset of the output sent to the Serial Monitor.
1386347400 Friday, 6 December 2013 16:30
1386563400 Monday, 9 December 2013 04:30
1386952200 Friday, 13 December 2013 16:30
1387168200 Monday, 16 December 2013 04:30
1387548000 Friday, 20 December 2013 14:00
1389155400 Wednesday, 8 January 2014 04:30
1389371400 Friday, 10 January 2014 16:30
1389587400 Monday, 13 January 2014 04:30
1389967200 Friday, 17 January 2014 14:00
1390278600 Tuesday, 21 January 2014 04:30
1390581000 Friday, 24 January 2014 16:30
1390797000 Monday, 27 January 2014 04:30
1391185800 Friday, 31 January 2014 16:30
1391401800 Monday, 3 February 2014 04:30
1391790600 Friday, 7 February 2014 16:30
1392006600 Monday, 10 February 2014 04:30
1392395400 Friday, 14 February 2014 16:30
1392611400 Monday, 17 February 2014 04:30
1393000200 Friday, 21 February 2014 16:30
1393216200 Monday, 24 February 2014 04:30
1393605000 Friday, 28 February 2014 16:30
1393821000 Monday, 3 March 2014 04:30
1394209800 Friday, 7 March 2014 16:30
1394425800 Monday, 10 March 2014 04:30
1394814600 Friday, 14 March 2014 16:30
1395030600 Monday, 17 March 2014 04:30
1395419400 Friday, 21 March 2014 16:30
1395635400 Monday, 24 March 2014 04:30
1396024200 Friday, 28 March 2014 16:30
1396240200 Monday, 31 March 2014 04:30
1396629000 Friday, 4 April 2014 16:30
1396845000 Monday, 7 April 2014 04:30
1397233800 Friday, 11 April 2014 16:30
1397449800 Monday, 14 April 2014 04:30
1397743200 Thursday, 17 April 2014 14:00
1398141000 Tuesday, 22 April 2014 04:30
1398348000 Thursday, 24 April 2014 14:00
1398659400 Monday, 28 April 2014 04:30
1399048200 Friday, 2 May 2014 16:30
1399264200 Monday, 5 May 2014 04:30
1399653000 Friday, 9 May 2014 16:30
1399869000 Monday, 12 May 2014 04:30
1400257800 Friday, 16 May 2014 16:30
1400473800 Monday, 19 May 2014 04:30
1400862600 Friday, 23 May 2014 16:30
1401078600 Monday, 26 May 2014 04:30
1401458400 Friday, 30 May 2014 14:00
1401769800 Tuesday, 3 June 2014 04:30
1402072200 Friday, 6 June 2014 16:30
1402288200 Monday, 9 June 2014 04:30
1402677000 Friday, 13 June 2014 16:30
1402893000 Monday, 16 June 2014 04:30
1403281800 Friday, 20 June 2014 16:30
1403497800 Monday, 23 June 2014 04:30
1403886600 Friday, 27 June 2014 16:30
1404102600 Monday, 30 June 2014 04:30
1404491400 Friday, 4 July 2014 16:30
1404707400 Monday, 7 July 2014 04:30
1405096200 Friday, 11 July 2014 16:30
1405312200 Monday, 14 July 2014 04:30
1405701000 Friday, 18 July 2014 16:30
1405917000 Monday, 21 July 2014 04:30
1406305800 Friday, 25 July 2014 16:30
1406521800 Monday, 28 July 2014 04:30
1406910600 Friday, 1 August 2014 16:30
1407126600 Monday, 4 August 2014 04:30
1407515400 Friday, 8 August 2014 16:30
1407731400 Monday, 11 August 2014 04:30
1408120200 Friday, 15 August 2014 16:30
1408336200 Monday, 18 August 2014 04:30
1408725000 Friday, 22 August 2014 16:30
1408941000 Monday, 25 August 2014 04:30
1409329800 Friday, 29 August 2014 16:30
1409545800 Monday, 1 September 2014 04:30
1409934600 Friday, 5 September 2014 16:30
1410150600 Monday, 8 September 2014 04:30
1410539400 Friday, 12 September 2014 16:30
1410755400 Monday, 15 September 2014 04:30
1411144200 Friday, 19 September 2014 16:30
1411360200 Monday, 22 September 2014 04:30
1411749000 Friday, 26 September 2014 16:30
1411965000 Monday, 29 September 2014 04:30
1412353800 Friday, 3 October 2014 16:30
1412569800 Monday, 6 October 2014 04:30
1412958600 Friday, 10 October 2014 16:30
1413174600 Monday, 13 October 2014 04:30
1413563400 Friday, 17 October 2014 16:30
1413779400 Monday, 20 October 2014 04:30
1414159200 Friday, 24 October 2014 14:00
1414470600 Tuesday, 28 October 2014 04:30
1414773000 Friday, 31 October 2014 16:30
1414989000 Monday, 3 November 2014 04:30
1415377800 Friday, 7 November 2014 16:30
1415593800 Monday, 10 November 2014 04:30
1415982600 Friday, 14 November 2014 16:30
1416198600 Monday, 17 November 2014 04:30
1416587400 Friday, 21 November 2014 16:30
1416803400 Monday, 24 November 2014 04:30
1417192200 Friday, 28 November 2014 16:30
1417408200 Monday, 1 December 2014 04:30
1417797000 Friday, 5 December 2014 16:30
1418013000 Monday, 8 December 2014 04:30
1418401800 Friday, 12 December 2014 16:30
1418617800 Monday, 15 December 2014 04:30
1419006600 Friday, 19 December 2014 16:30
1419222600 Monday, 22 December 2014 04:30
1419611400 Friday, 26 December 2014 16:30
1419827400 Monday, 29 December 2014 04:30