ApplicanceRemoteControlAdvanced

byte pinMap[] = {5, 6, 7, 8, 9, 10, 11, 12};
byte pinCount = sizeof(pinMap) / sizeof(byte);
 
int buttonPressTime = 250;  // milliseconds

void setup(){
  Serial.begin(115200);
  
  for (byte index = 0; index < pinCount; index ++) {
    pinMode(pinMap[index], OUTPUT);
    digitalWrite(pinMap[index], LOW);
  }
}
 
void loop() {
  if (Serial.available()) {
    byte button = Serial.read() - '0' - 1;  // Convert ASCII to button number

    if (button >= 0 && button < pinCount) pressButton(button);
  }
}
 
void pressButton(byte button) {
  Serial.print("Button ON: ");
  Serial.println(button);

  digitalWrite(pinMap[button], HIGH);
  delay(buttonPressTime);
  digitalWrite(pinMap[button], LOW);

  Serial.print("Button OFF: ");
  Serial.println(button);
}