nightchild12 posted:

That is totally possible. Easiest way is probably to use the Metro library as a timer to see if ~200 ms has passed between keypresses. I haven't used it myself so this may not be right, but here's something along the lines of what you want:

code:

Metro keypressTimer = Metro(2000); // set up timer with 2000ms period
char keyArray[10] = {'\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0'};
int keyArrayIndex = 0;

void loop(){

  if( keypressTimer.check() == 1 && keyArray[0] != '\0' ) { // if timer expired and keyArray has contents
    Serial.println(keyArray); // print keyArray
    keyArray = {'\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0'}; // clear keyArray
    keyArrayIndex = 0; // reset keyArrayIndex
  }

  char key = keypad.getKey(); // read in key press

  if (key != NO_KEY){ // if we got a value for the key press
    keyArray[keyArrayIndex] = key; // put key press into keyArray
    if(keyArrayIndex < 9) {keyArrayIndex++}; // increment index if it won't overflow
    keypressTimer.reset(); // reset timer
  }
}

The above makes several assumptions. I haven't included most of your keypad code. The length of keyArray should be set to the longest string of characters you expect. The tenth input value will be modified if more keys are pressed before the timer expires but after you've filled the array. I am assuming that \0 is an acceptable way to write a null character. You might be better off using a string object rather than an array for this. I haven't tested this to see if it will run or even checked it very thoroughly for correctness. You can also roll your own timer using millis() instead of using Metro.

But that's a basic way you can do it. Run a timer which resets each time a key is pressed, and only output when the timer expires or reaches a certain value.