The 4-Port USB HUB HAT is an essential expansion board designed to increase the USB capacity of your Raspberry Pi while adding convenient serial debugging capabilities. Its mounting holes and size are specifically tailored to match the Raspberry Pi Zero series, but it remains fully compatible with larger Pi models.

Specifications

• Operating Voltage: 5V DC
• USB Standard: Compatible with USB 2.0 / 1.1
• USB HUB Chip: FE1.1S (High-speed USB 2.0 controller)
• USB to UART Chip: CP2102 (Silicon Labs)
• Interface: Raspberry Pi GPIO header (for power/serial) and Micro USB (for data)
• Clock: 12MHz Crystal oscillator

Features

• 4-Port Expansion: Adds four fully functional USB 2.0 ports to your Raspberry Pi, allowing you to connect peripherals like keyboards, mice, Wi-Fi dongles, and external storage simultaneously.
• Integrated USB to UART: Features an onboard CP2102 converter with a dedicated enable/disable switch. This allows for easy serial debugging via a terminal without interfering with other hardware.
• Visual Status Monitoring: Includes a comprehensive set of LED indicators for real-time feedback:
  • Power LED: Confirms the board is receiving 5V.
  • USB to UART LED: Indicates active serial communication.
  • D1 to D4 LEDs: Dedicated status indicators for each of the four USB ports.
• Perfect Fit for Zero Series: Designed to stack perfectly on top of the Raspberry Pi Zero, Zero W, and Zero WH using the included micro USB connector.
• Universal Compatibility: Works with Raspberry Pi 2B, 3B, 3B+, 4B and 5B when connected via a standard Micro USB cable to the HAT’s bottom interface.

What’s Onboard

• Raspberry Pi GPIO Header: For power delivery and serial communication.
• USB HUB Interface (Bottom): Used to bridge the HAT to the Pi's native USB port.
• USB1–USB4 Ports: The four extended type-A USB connectors.
• Enable/Disable Switch: Controls the USB to UART function to avoid port conflicts.

Common Applications

• Expanding the single USB port on Raspberry Pi Zero for desktop-like usage.
• Headless serial debugging of Raspberry Pi OS.
• Connecting multiple sensors or controllers for IoT and robotics projects.
• Small-scale USB peripheral testing and development.