const byte
dataPin = 2,
clockPin = 3,
latchPin = 4,
numBits = 8
;

void setup ()
{
  Serial.begin ( 115200 );
  pinMode ( dataPin, INPUT );
  pinMode ( clockPin, OUTPUT );
  pinMode ( latchPin, OUTPUT );
}

void loop ()
{
  digitalWrite ( latchPin, LOW );
  digitalWrite ( latchPin, HIGH );
  
  Serial.print ( "Bits: " );
  for ( byte n = 0; n < numBits; n ++ )
  {
    Serial.print ( digitalRead ( dataPin ) );
    digitalWrite ( clockPin, HIGH ); // Shift out the next bit
    digitalWrite ( clockPin, LOW );
  }
  Serial.println ();
  delay ( 200 );
}