Create a safety button

[Andrewa80]

As a title, to avoid accidental pressures, i need to create a button mode push with a delay of 3 seconds before start the code, and break if the time is less of 3 seconds.
I try with this sketch but there is something wrong

long currentMillis = 0;
int periodo = 3000;
long startMillis = 0;

 BLYNK_WRITE(V1) {
 int state = param.asInt();
 bool premuto = false;
 if (state == 1) {
 premuto = true;
 startMillis = millis();
 currentMillis = startMillis;
 while (currentMillis < (startMillis + periodo)) {
    currentMillis = millis();
    if (param.asInt() == 0) premuto = false;
    else premuto = true; 
 } 
if (currentMillis >= startMillis && premuto)
  digitalWrite(15, LOW);
}
else
  digitalWrite(15, HIGH);
}

[Blynk_Coeur]

did you seen my post ?

Blynk Slider Security

Something like that? You could replace lock button by enter login and password using terminal widget to unlock sliders. [Video_00460]

[Andrewa80]

Not exactly, I don’t have to protect it from a password, I have to protect it from accidental pressure

[Blynk_Coeur]

yes that the way I use it .
slider is locked until I press the button !

[Andrewa80]

Where is the example sketch of this gif?

[Gunner]

Here is my example of a safety switch using a slider… I will eventually get around to making one for a button that requires a long press… but probably not before Blynk 2.0 is released, thus nullifying the need anyhow as it will apparently have such a feature?

C++ Blynk - Code Examples for Basic Tasks (Work in Progress)

#27 - Code solutions for “Secure” Buttons & Switches I will start with this one and add more in later… A simple slider set with a range of 0-1, Decimals to #.# and Send on Release ON works just like a spring loaded toggle or slide switch. Then with a 10 “digit” range of 0.0-1.0 You have to commit to the full slide to activate. [image] You can “slide” it ON and even returns back to OFF if you change your mind and don’t slide all the way or don’t release before sliding back… it only processes…

[Andrewa80]

thanks, why didn’t I think of it before …?

[Blynk_Coeur]

@Andrewa80

else you can do that too, press 2 sec to unlock any buttons!

/**************** LOCK UNLOCK **************/
BLYNK_WRITE(V50) {  // button to be held down to activate
    if (param.asInt() and  !LongHold ) {
    ButtonTimer = timer.setTimeout(2000, LongHoldDetect); // press 2 sec
    ButtonPressed = true;
    
// Button has been released
  } else {
    ButtonPressed = false;        // Reset press flag
 
    // If the long hold function wasn't called, it's a short press.
    if (!LongHold) {
      timer.deleteTimer(ButtonTimer);   // Kill the long hold timer if it hasn't been activated.

      // Reset the long press flag
      LongHold = false;
      greenLed.off();
      redLed.on();
    }
  }
}

// Checks for long press condition on SETTINGS button
void LongHoldDetect() {
  // If the button is still depressed, it's a long hold
  if (ButtonPressed) {
    LongHold = true;
    greenLed.on();
    redLed.off();
     }
}

BLYNK_WRITE(V51) {  // Reset button
  if (param.asInt()) {
    if (LongHold = true) {
      ButtonPressed = false;
      LongHold =  false;
      greenLed.off();
      redLed.on();
        }
  }
}