while (Serial.available() == 0) - autocomplete WiFi connection

Using Arduino Programming Questions
1

I use serial monitor to enter SSID and password to make WiFi connection. If I connect next time to the same SSID I can only press Enter key without entering any data and Wifi connection is successful.
This code forces me to press enter key everytime I run program. What schould I do to pass after 10 seconds delay without pressing enter key everytime?

while (Serial.available() == 0) {
    // wait
  }
  Serial.readBytesUntil(10, password, 50);
  Serial.println(password);

(edit)
I used Serial.setTimeout(10000) after Serial.begin and commented line while(Serial...
This way program waits 10 seconds for entering data and after this time goes on. Works.

2

I use something like

void setup()
{
  bool dataReceived = false;
  Serial.begin(57600);
  while(millis() < 5000)
  {
    if (Serial.available() > 0)
    {
      dataReceived  = true;
      break;
    }
  }

  if(dataReceived == true)
  {
    // do what needs to be done with the data
  }
}

When setup starts, millis() equals zero. The above loops for 5 seconds waiting for serial data. If data is received, a flag is set to true and and the while-loop is terminated (break statement).

Next the code checks the flag and takes action based on that.

Your approach will work as well, but I don't use blocking functions if it can be prevented and hence I don't use readBytesUntil().

The above approach also works if you want to wait for a while for a button press.

void setup()
{
  bool buttonIsPressed = false;

  pinMode(someButton, INPUT_PULLUP);

  while(miillis() < 5000)
  {
    if(digitalRead(someButton) == LOW)
    {
      buttonnIsPressed = true;
      break;
    }
  }

  if(buttonIsPressed == true)
  {
    // do something if button was pressed within 5 seconds of start up
  }
}