Keypad programming for start/enter

[vicmakau]

Hello guys am new to arduino and I was wondering how do I use a 4 by 4 keypad such that when I input my value let's say 10 and I press A(enter/start)
It will multiply with value x and then set ouput pin high when the value is attained the output pin becomes low

[J-M-L]

what have you tried?

do you know how to listen for the input and get that in some buffer?

[sterretje]

Your topic has been moved to a more suitable location on the forum. Installation and Troubleshooting is not for problems with nor for advice on yoyr project.

[johnwasser]

boolean isOn = false;
unsigned long startTime;
unsigned long interval;

void loop()
{
  char key = keypad.getKey();

  if (isOn && millis() - startTime > interval)
  {
    // Time to turn the OutputPin off.
    digitalWrite(OutputPin, LOW);
    isOn = false;
  }

  switch (key)
  {
    case '*':  // Clear
      InputValue = 0;
      InputLength = 0;
      break;

    case '0'...'9':
      InputValue *= 10;
      InputLength++;
      InputValue += key - '0';
      break;

    case 'A': // Enter
      isOn = true;
      startTime = millis();
      interval = InputValue * x;
      digitalWrite(OutputPin, HIGH);
      InputValue = 0;
      break;

[vicmakau]

Thanks let me try