void updateButtonStates() {
  // Read the state of each button and update the boolean array
  bool pressed = false;
  for (int i = 0; i < numButtons - 1; ++i) {
    pressed = digitalRead(buttonPins[i]) == LOW;
    if (pressed != buttonStates[i]) {
      if (!buttonStates[i]) {
        //Button down
        Serial.print("[INFO] keydown=");
        Serial.println(i);
        handleButtonDown(i);
      } else {
        //Button up
        Serial.print("[INFO] keyup=");
        Serial.println(i);
        handleButtonUp(i);
      }

      buttonStates[i] = pressed;
    }
  }

  //Read the analog emulated pins
  int a0Valu = analogRead(A0);
  pressed = (a0Valu < 1000);
  if (pressed != buttonStates[4]) {
    if (!buttonStates[4]) {
      //Button down
      Serial.println("[INFO] keydown=4");
      handleButtonDown(4);
    } else {
      //Button up
      Serial.println("[INFO] keyup=4");
      handleButtonUp(4);
    }

    buttonStates[4] = pressed;
  }
}

// Function to reset all outputs to 0
void resetOutputs() {
  // Shift in 8 zeros (all outputs off)
  for (int i = 0; i < 8; ++i) {
    digitalWrite(SER_PIN, LOW);
    digitalWrite(SRCLK_PIN, HIGH);
    delay(1); // Optional: Adjust delay if needed
    digitalWrite(SRCLK_PIN, LOW);
  }
  // Latch the data to the output pins
  digitalWrite(RCLK_PIN, HIGH);
  delay(1); // Optional: Adjust delay if needed
  digitalWrite(RCLK_PIN, LOW);
}

//Handle button down and up events, index start from 0
void handleButtonDown(int index) {
  
}

void handleButtonUp(int index) {
  //Generate the base URL from ip and port
  String baseURL = "http://" + target_ip.toString() + ":" + String(target_port);
  if (index == 0){
     baseURL += "/toggle?relay=0";
  }else if (index == 1){
    baseURL += "/toggle?relay=1";
  }else if (index == 2){
    baseURL += "/toggle?relay=2";
  }else if (index == 3){
    baseURL += "/toggle?relay=3";
  }else if (index == 4){
    resolveTargetRelayIP();
    return;
  }

  Serial.println("Sending request to: " + baseURL);
  GetRequest(baseURL);

}