Infinite loop when button is ON. Break when button is OFF

swarnk · October 5, 2018, 8:03am

Good afternoon. How i can organize the execution of an infinite loop when pressing the button and exit it when the button is turned off?


BLYNK_WRITE(V1)
 { 
int pinValue = param.asInt(); 
 if(param.asInt()==1)
{ 
  Serial.print("V1 IS ON");
// Want infinite loop here, but break it when V1 button is off
}
  else
{
  Serial.print("V1 IS OFF ");
}

}


void setup()
{
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
  }

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

How run infinite loop when button is on, and break this loop when button is off?
Thanks and sorry for bad english.

Blynk_Coeur · October 5, 2018, 8:05am

you have to enable a timer to call your function, and disable the timer when press OFF

Blynk_Coeur · October 5, 2018, 8:09am

//in setup 
StartDoTimer = timer.setInterval(1000L, StartDo);
  timer.disable(StartDoTimer ); // Turn StartDoTimer off

BLYNK_WRITE(V1)
 { 
int pinValue = param.asInt(); 
 if(param.asInt()==1)
{ 
timer.enable(StartDoTimer ); // Turn StartDoTimer on
  Serial.print("V1 IS ON");
// Want infinite loop here, but break it when V1 button is off
}
  else
{
  Serial.print("V1 IS OFF ");
timer.disable(StartDoTimer ); // Turn StartDoTimer off
}

}

void StartDoTimer (){
//do something
}

swarnk · October 5, 2018, 8:11am

Thank you for quick reply!
I’ll try now…

Blynk_Coeur · October 5, 2018, 8:14am

maybe you need more time to execute your “todo something”
so you can change 1000L to an other value

swarnk · October 5, 2018, 8:37am

it’s not hard for you to fix my code?
I’m trying to follow your recommendations, but I get errors when compiling
Thank you very much!

#define BLYNK_PRINT Serial
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

char auth[] = "xxxxxxxxxxxxxxxxxx";
char ssid[] = "xxxxxxxxxxxxxxxxxx";
char pass[] = "xxxxxxxxxxxxxxxxxx";

BLYNK_WRITE(V1)
 { 
int pinValue = param.asInt(); 
 if(param.asInt()==1)
{ 
  Serial.print("V1 IS ON");
// Want infinite loop here, but break it when V1 button is off
}
  else
{
  Serial.print("V1 IS OFF ");
}

}

void setup()
{
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
  }

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

Blynk_Coeur · October 5, 2018, 8:41am

show me the compile error

Blynk_Coeur · October 5, 2018, 8:46am

oh sorry , I made a mistake

void StartDo (){ /// not StartDoTimer !!!
//do something
}

swarnk · October 5, 2018, 9:06am

This is my code:

#define BLYNK_PRINT Serial
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

char auth[] = "xxxxxxxxxxxxxxxxxx";
char ssid[] = "xxxxxxxxxxxxxxxxxx";
char pass[] = "xxxxxxxxxxxxxxxxxx";

BLYNK_WRITE(V1)
 { 
int pinValue = param.asInt(); 
 if(param.asInt()==1)
{ 
timer.enable(StartDoTimer ); // Turn StartDoTimer on
  Serial.print("V1 IS ON");
// Want infinite loop here, but break it when V1 button is off
}
  else
{
  Serial.print("V1 IS OFF ");
timer.disable(StartDoTimer ); // Turn StartDoTimer off
}

}

void StartDo (){
//do something
}

void setup()
{
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
  StartDoTimer = timer.setInterval(1000L, StartDo);
  timer.disable(StartDoTimer ); // Turn StartDoTimer off
  }

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

Compile error:

sketch_oct05b:15:1: error: ‘timer’ was not declared in this scope
timer.enable(StartDoTimer ); // Turn StartDoTimer on
^
sketch_oct05b:15:14: error: ‘StartDoTimer’ was not declared in this scope
timer.enable(StartDoTimer ); // Turn StartDoTimer on
^
sketch_oct05b:22:1: error: ‘timer’ was not declared in this scope
timer.disable(StartDoTimer ); // Turn StartDoTimer off
^
sketch_oct05b:22:15: error: ‘StartDoTimer’ was not declared in this scope
timer.disable(StartDoTimer ); // Turn StartDoTimer off
^
/tmp/arduino_modified_sketch_600126/sketch_oct05b.ino: In function ‘void setup()’:
sketch_oct05b:35:3: error: ‘StartDoTimer’ was not declared in this scope
StartDoTimer = timer.setInterval(1000L, StartDo);
^
sketch_oct05b:35:18: error: ‘timer’ was not declared in this scope
StartDoTimer = timer.setInterval(1000L, StartDo);
^

exit status 1
‘timer’ was not declared in this scope

Blynk_Coeur · October 5, 2018, 9:16am

you need to declare that

/***************** Library for Blynk real-time clock *****************/

#include <WidgetRTC.h>

BlynkTimer timer;
WidgetRTC rtc;

swarnk · October 5, 2018, 9:24am

I am very sorry for wasting your time, but I am confused

I am now reading the documentation on timers, but for now I can not figure out what exactly causes an error.

This is my fixed code:

#define BLYNK_PRINT Serial
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <WidgetRTC.h>

char auth[] = "xxxxxxxxxxxxxxxxxx";
char ssid[] = "xxxxxxxxxxxxxxxxxx";
char pass[] = "xxxxxxxxxxxxxxxxxx";

BlynkTimer timer;
WidgetRTC rtc;

BLYNK_WRITE(V1)
 { 
int pinValue = param.asInt(); 
 if(param.asInt()==1)
{ 
timer.enable(StartDoTimer ); // Turn StartDoTimer on
  Serial.print("V1 IS ON");
// Want infinite loop here, but break it when V1 button is off
}
  else
{
  Serial.print("V1 IS OFF ");
timer.disable(StartDoTimer ); // Turn StartDoTimer off
}

}

void StartDo (){
//do something
}

void setup()
{
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
  StartDoTimer = timer.setInterval(1000L, StartDo);
  timer.disable(StartDoTimer ); // Turn StartDoTimer off
  }

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

Compile errors:

/tmp/arduino_modified_sketch_566374/sketch_oct05b.ino: In function ‘void BlynkWidgetWrite1(BlynkReq&, const BlynkParam&)’:
sketch_oct05b:19:14: error: ‘StartDoTimer’ was not declared in this scope
timer.enable(StartDoTimer ); // Turn StartDoTimer on
^
sketch_oct05b:26:15: error: ‘StartDoTimer’ was not declared in this scope
timer.disable(StartDoTimer ); // Turn StartDoTimer off
^
/tmp/arduino_modified_sketch_566374/sketch_oct05b.ino: In function ‘void setup()’:
sketch_oct05b:39:3: error: ‘StartDoTimer’ was not declared in this scope
StartDoTimer = timer.setInterval(1000L, StartDo);
^
exit status 1
‘StartDoTimer’ was not declared in this scope

Blynk_Coeur · October 5, 2018, 9:34am

you need to declare

int StartDoTimer;

swarnk · October 5, 2018, 9:37am

thank you so much and sorry again for your time!

Blynk_Coeur · October 5, 2018, 9:41am

don’t worry

swarnk · October 5, 2018, 10:01am

Сompilation passes without errors, but when i loaded this to esp32 apparently the timer does not work…

Final code:

#define BLYNK_PRINT Serial
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <WidgetRTC.h>

char auth[] = "xxxxxxxxxxxxxxxx";
char ssid[] = "xxxxxxxxxxxxxx";
char pass[] = "xxxxxxxxxxx";
int StartDoTimer;
BlynkTimer timer;
WidgetRTC rtc;

BLYNK_WRITE(V1)
 { 
int pinValue = param.asInt(); 
 if(param.asInt()==1)
{ 
timer.enable(StartDoTimer); // Turn StartDoTimer on
  Serial.print("V1 IS ON");
}
  else
{
  Serial.print("V1 IS OFF ");
timer.disable(StartDoTimer ); // Turn StartDoTimer off
}

}

void StartDo (){
Serial.print("Print This Line One Time Per second");
}

void setup()
{
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
  StartDoTimer = timer.setInterval(1000L, StartDo);
  timer.disable(StartDoTimer); // Turn StartDoTimer off
  }

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

When i pressed button V1, in console i’m getting: V1 IS ON or V1 if OFF, but not the “Print This Line One Time Per second”

Where could i mess up again?

swarnk · October 5, 2018, 10:14am

Found the mistake.

void loop()
{
  Blynk.run();
  timer.run();  // <----- Add this to void loop()
}

This is the right way?

Blynk_Coeur · October 5, 2018, 10:15am

not sure, but it seems you have to add real time clock widget

05-024060

Blynk_Coeur · October 5, 2018, 10:17am

yes it is the mistake

swarnk · October 5, 2018, 10:18am

Now everything seems to work.

swarnk · October 5, 2018, 10:25am

I saw that the code works without

#include <WidgetRTC.h>
/WidgetRTC rtc;

i’m commented this lines and everything seems to work.