Timer.setinterval

Projects Programming
1

Hi there

I am new at Arduino and at this forum.

I do not understand completely the Arduino sketch philosophy.

Assume I would need to call 3 functions to run my code, my question is how many Timer.setInterval
functions should I use in void setup()?

Thank for some help.

3

Thank you Delta_G
What really happens is that I am learning about using Arduino with Blynk apps.

They put something like this in the setup() function:

void setup()
{

// Debug console
Serial1.begin(56700);

delay(5000); // Allow board to settle
Blynk.begin(auth);

// Setup a function to be called every second

timer.setInterval(1000L, sendAmp);

timer.setInterval(1000L, SEmail);

//Blynk.email("Email address ", "High Amps limit reached", "Amps >7.0");
}

void loop()
{
Blynk.run();
timer.run();
}

The function definition for sendAmp() and SEmail() are located before void setup()
But what stuck me is I am setting timer.setInterval with two subsequent arguments.
It seem to me that is not correct.
Thank you very much for your help.

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4

The setInterval (or something like it) is only needed for functions that should be run at specific intervals.

loop runs much faster and can call any functions like @Delta_G showed you.

BTW sending EMails each second seems a rather strange idea to me (and probably your provider).

You don't have to use setInterval if you manage the timing yourself.

const unsigned long emailAll = 1000; 
const unsigned long ampAll = 1000;
const unsigned long someFuncAll = 60000UL;

unsigned long lastEmail;
unsigned long lastAmp;
unsigned long lastSomeFunc;

void setup() {
  Serial1.begin(250000);
  Blynk.begin(auth);
}

void loop() {
  unsigned long topLoop = millis();
  Blynk.run();
  if (topLoop - lastAmp >= ampAll) {
    lastAmp = topLoop;
    sendAmp();
  }
  if (topLoop - lastEmail >= emailAll) {
    lastAmp = topLoop;
    SEmail();
  }
  if (topLoop - lastSomeFunc >= someFuncAll) {
    lastSomeFunc = topLoop;
    someFunc();
  }
}
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5

Hi Whandall

Thank you very much for tour clear explanation.

I understood your code and .....where are initialized these variables before void setup() ?:

unsigned long lastEmail;
unsigned long lastAmp;
unsigned long lastSomeFunc;

1 Like
6

As global variables they are initialized to zero.

1 Like
7

Thank you very much Whandall I forgot that!!!!

1 Like