How can I break the loop if it hasn't finished in 10 seconds?

Question

Currently I am using OneButton.h library to code my push button project.

When I press button1, it will loop for 10sec and print TRIG, and after that it will break the loop.

However, now I want to program it where when I pressed button1, it will jump to void(singleclick) function, but right now, during the 4th seconds (anytime before 10th sec) , I pressed other button, thus Arduino will break the 10sec loop and run other function.

Thus, I need help how to make sure Arduino actively read other button and when pressed, it will break the current loop/function to other related functions.

#include <OneButton.h>
OneButton button1(2, true);
OneButton button2(3, true);
OneButton button3(4, true);
OneButton button4(5, true);
int led1=12;
int led2=11;
int led3=10;
int led4=9;
int flag;
unsigned long mode;
void setup()
{
 Serial.begin(9600);
 pinMode(led1,OUTPUT);
 pinMode(led2,OUTPUT);
 pinMode(led3,OUTPUT);
 pinMode(led4,OUTPUT);
 button1.attachClick(singleclick1);
 button1.attachLongPressStop(longclick);
 button2.attachClick(singleclick2);
 button3.attachClick(singleclick3);
 button4.attachClick(singleclick4);
 digitalWrite(led1,HIGH);
 digitalWrite(led2,HIGH);
 digitalWrite(led3,HIGH);
 digitalWrite(led4,HIGH);
 
}
void loop()
{
 button1.tick();
 delay(20);
 button2.tick();
 delay(20);
 button3.tick();
 delay(20);
 button4.tick();
 delay(20);
 Serial.println("No button");
}
void singleclick1()
{
 mode=millis();
 flag=1;
 while(flag==1)
 {
 Serial.println("button1");
 digitalWrite(led1,HIGH);
 digitalWrite(led2,LOW);
 digitalWrite(led3,LOW);
 digitalWrite(led4,LOW);
 
 if(millis()-mode>5000)
 {
 Serial.println("TRIG");
 flag=0;
 button2.tick();
 delay(20);
 
 button3.tick();
 delay(20);
 
 button4.tick();
 delay(20);
 
 return;
 }
 }
}
void singleclick2()
{
 Serial.println("button2");
 digitalWrite(led1,LOW);
 digitalWrite(led2,HIGH);
 digitalWrite(led3,LOW);
 digitalWrite(led4,LOW);
}
 

• Kwasmich: You could run a timer that toggles a flag after 10 seconds. Then the loop would check that flag on each iteration.

Answer 1

This is just a rough, incomplete and untested code.

void singleclick1() { startTimer = true; } // this only sets a flag
void singleclick2() { runTimer = false;} // this only clears a flag
void loop() {
 button1.tick();
 button2.tick();
 if startTimer { // this occurs once every click 1
 mode = millis();
 runTimer = true;
 startTimer = false; // run this block only once every click 1
 digitalWrite(led1, HIGH);
 digitalWrite(led2, LOW );
 digitalWrite(led3, LOW );
 digitalWrite(led4, LOW );
 }
 unsigned long currentMillis = millis();
 if (currentMillis - mode > 10000) {
 runTimer = false; // 10 second timer expired
 }
 if (runTimer) {
 Serial.println("TRIG");
 
 }
 else {
 // optional stuff to do
 }
}

• Peterhan123: Thank you so much!