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Tiamon2017-11-13 20:15:09
Arduino
Tiamon, 2017-11-13 20:15:09

Problem with Arduino timer, why not working?

I can't figure out why the code doesn't work
Excerpts related to the question:
There is a small project, the relays are switched on by a timer. Decided to change quickly.
Make it so that after turning on the arduino, the relay turns on immediately for a given time, after which it turns on again at a given interval for a given time and so on in a cycle.
It seems to have done everything very simply, but it doesn’t work, it doesn’t turn on, I can’t understand why.

const long DurationCh_2 = 120;                  //ДЛИТЕЛЬНОСТЬ срабатывания реле

const long StartViaCh_2 = 200;                  //Включится через 

int Xer = 0;
int StartRelCn_2;

void loop()                                        // ПРОГРАММЫй безусловный ЦИКЛ
{
  DateTime myTime = RTC.now();                     //Читаем данные времени из RTC

  long utime = myTime.unixtime();                  //сохраняем время в формате UNIX
  utime %= 86400;                                  //Сохраняем в переменной остаток деления на кол-во секнд в сутках,
                                                   //Это дает количество секунд с начала текущих суток


    
   while(Xer < 1)				//Должно выполнятся один раз
      {
        Xer ++;
        StartRelCn_2 = utime;          		//Присвоить текущее время
      }

      
   if ((utime >= StartRelCn_2) &&
       (utime < (StartRelCn_2+DurationCh_2)))
      {
        digitalWrite(RelayChn2,LOW);                 //Устанавливаем на 2 входе релейного модуля НИЗКИЙ уровень - реле срабатывает
        StartRelCn_2 = StartRelCn_2 + StartViaCh_2;  // Повторно включаем через заданный интервал времени
      }
    else
      {
          digitalWrite(RelayChn2,HIGH);              //Устанавливаем на 2 входе релейного модуля ВЫСОКИЙ уровень - реле выключается
      }

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2 answer(s)
T
Tiamon, 2017-11-14
@Tiamon

I figured it out myself, it turned out to be in "long", that is, I had to specify a variable in this "format"
Since I have time in it

void loop()                                        // ПРОГРАММЫй безусловный ЦИКЛ
{
  long utime = myTime.unixtime();                  //сохраняем время в формате UNIX

So the correct code is:
int long DurationCh_2 = 120;                  //ДЛИТЕЛЬНОСТЬ срабатывания реле
int long StartViaCh_2 = 200;                  //Включится через 
int Xer = 0;
int long StartRelCn_2;

Then there is a correct comparison and assignment of variables

A
Alexander Gusev, 2017-11-13
@Sanchogus

Return everything as it was, and make a one-time inclusion in the initialization loop :)
Xer + 1; will not do anything with the Xer variable. This line will calculate the result, but will not assign it anywhere.
Xer++; or Xer += 1; try for fun. I didn't get into the logic.)

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