Using a keypad and to initiate a fingerprint sensor

Projects General Guidance
2

Hi,

As you say, you've only got it calling getFingerprintIDez() the once at the end of starPressed().

  Serial.println("Waiting for valid finger...");

getFingerprintIDez();

To get it to hang about repeating that scan for 20 seconds, you could do something like this:

  Serial.println("Waiting for valid finger...");
  unsigned long timeNow = millis();
  while (millis() - 20000 < timeNow) getFingerprintIDez();

That should get you on your way :slight_smile:

All it does is stores the value of the millis() timer then stays in a loop repeating getFingerprintIDez() until millis() progresses 20,000 ticks past the stored start time.

Cheers ! Geoff