USB HUB ETH HAT(U3E100) B

I. Introduction

1.1 Product Overview

Raspberry Pi Zero expansion board, expands 3 USB 2.0 ports and 1 RJ45 10/100M Ethernet port.

This USB HUB ETH expansion board is specially designed for the Raspberry Pi Zero series. It provides powerful expansion capability and perfectly fits the Raspberry Pi Zero in an extremely small size. It includes three USB 2.0 Type-A ports and one RJ45 Ethernet port, making it easy to connect various peripherals and network devices. Through simple installation, it not only expands the Raspberry Pi's USB ports but also provides adaptive 10/100M network connection, making it ideal for scenarios requiring multiple USB devices and network connectivity.

1.2 Product Features

Transparent working status LEDs: onboard 1 power indicator and 3 USB expansion port indicators.
Onboard 3 USB 2.0 expansion ports and a 10/100M RJ45 Ethernet port.
Efficient USB and network transmission: provides stable USB 2.0 transmission speed and a 10/100M Ethernet port, suitable for most daily applications and network device connection needs.

II. Resource Overview

Item	Specification
Model	USB HUB ETH HAT(U3E100) B
Power Supply Voltage	5V
USB Interface	USB 2.0
Ethernet Connector	RJ45
Ethernet Speed	10/100 Mbps
Through-hole Diameter	2.5mm
Dimensions	65 mm × 30 mm

Ⅲ. Resource Overview

①Raspberry Pi 40-pin female header.
②3 USB 2.0 ports.
③USB port working status indicators.
④RJ45 Ethernet connector.
⑤Power indicator.
⑥M2.5 mounting holes.
⑦Type-C connector: USB HUB interface.

IV. Usage

4.1 Instructions

4.1.1 Hardware Description

Onboard RJ45 Ethernet port, supports 10/100M adaptive network connection, suitable for wired network transmission. Please ensure the Ethernet cable is compatible with the device and that it is correctly inserted into the port. You can observe the port indicator to determine the current network status.
Onboard 3 USB 2.0 ports, equipped with USB 2.0 port status indicators. When a device is properly mounted on a USB 2.0 port, the corresponding status indicator will light up.

4.1.2 Precautions

When connecting a USB device, observe whether the corresponding indicator lights up to determine whether the USB device connection is normal.
Do not assemble while powered on.

4.2 Testing

4.2.1 Using on Raspberry Pi OS

Open the Raspberry Pi terminal.

Enter the directory to be tested.

lsblk # View USB drive devices 
df -h # Check the mount path; assume it is mounted at /media/pi/UDISK 
cd /media/pi/UDISK

Free memory:

sudo sh -c "sync && echo 3 > /proc/sys/vm/drop_caches"

Test write speed:

sudo dd if=/dev/zero of=/mount/path/testfile bs=1M count=1024 oflag=direct status=progress

Test read speed:

sudo dd if=/mount/path/testfile of=/dev/null bs=1M count=1024 iflag=direct status=progress

Clean up test file:

sudo rm /mount/path/testfile

4.2.2 Testing Network Speed on Raspberry Pi OS

Use the iperf3 tool. Run the following command on the Raspberry Pi to install the tool:

sudo apt install iperf3

The tool also needs to be downloaded on the PC.

On the Raspberry Pi, run the command to start a server on port 5100. # The port can be set according to actual conditions.

sudo apt install iperf3

Open the software via the command line on the PC.

Press Win+R, type cmd in the Run dialog to open the Command Prompt.

Go to the software directory and run the following command:

.\iperf3.exe -c 192.168.0.** -p 5100

You will then see the relevant network transmission data printed in the window.