-- Create biometric_devices table
CREATE TABLE IF NOT EXISTS hr_biometric_devices (
    id INT AUTO_INCREMENT PRIMARY KEY,
    device_name VARCHAR(100) NOT NULL,
    ip_address VARCHAR(50) NOT NULL,
    port INT DEFAULT 4370,
    io_address VARCHAR(100), -- specific request
    serial_number VARCHAR(100),
    status ENUM('active', 'inactive') DEFAULT 'active',
    last_sync TIMESTAMP NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);