// Pin connections
const int dataPin = 9;   // Q7 pin of 74HC165
const int loadPin = 10;  // PL pin of 74HC165
const int clockPin = 13; // CP pin of 74HC165



void setup() {
  pinMode(dataPin, INPUT);
  pinMode(loadPin, OUTPUT);
  pinMode(clockPin, OUTPUT);

  // Initialize serial communication for debugging
  Serial.begin(9600);
}

void loop() {
  // Read parallel input states into the shift register
  digitalWrite(loadPin, LOW); // Load the parallel inputs into the shift register
  delayMicroseconds(5);
  digitalWrite(loadPin, HIGH); // Prepare to shift the data out
  delayMicroseconds(5);

  // Shift the data out and read the states
  byte buttonStates = shiftIn(dataPin, clockPin, MSBFIRST);

  // Print the button states for debugging
  Serial.print("Button states: ");
  Serial.println(buttonStates, BIN);

  delay(500); // Loop delay
}