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Software announcements · Jul 13, 2026 · 4 min read

U2L-Sharer — share any USB device over your network

New firmware for the SLZB-U2L: U2L-Sharer turns it into a network USB server. Share a printer, a scanner, a Bluetooth adapter or almost any low-bandwidth USB device — and it shows up on a remote PC exactly as if it were plugged in there. Standard USB/IP, one-click on Windows.

We are excited to share U2L-Sharer — a firmware that turns your SLZB-U2L into a network USB device server. Flash it, plug in a USB device, and reach that device from any computer on your LAN.

The key trick: on the remote computer the device appears exactly as if you had plugged it into that machine directly — the same drivers, the same behaviour. It rides the standard USB/IP protocol, so a printer, a scanner, a Bluetooth adapter, a HID interface or a USB IR blaster becomes a shared, network-wide device.

U2L-Sharer USB Devices page — printers and other USB devices, shared

Share the devices you already have

Park a USB printer, scanner or label printer on the SLZB-U2L and reach it from every computer in the house or office — no dedicated print server, no USB cable trailing across the room. The same goes for Bluetooth adapters, HID interfaces, USB IR blasters, serial adapters and licence or security dongles: keep them plugged into the U2L wherever the socket is convenient, and use them from any PC as though they were local.

Almost anything USB works — as long as it is low-bandwidth.

How it works

  1. Flash U2L-Sharer onto your SLZB-U2L (web OTA, or esptool for a first flash).
  2. Plug in a USB device and Ethernet. Anything you connect is shared on the LAN automatically — a solid green LED means the network is ready, blue means a device is live.
  3. Attach it from your PC. Install the SMLIGHT USB Manager on Windows (it auto-discovers the U2L over mDNS) or use usbip on Linux. One click and the device is local.

Good to know

U2L-Sharer is a clean rewrite with a proper web console — status, network, access control, a live log and OTA updates, in six languages. It resolves the Windows re-enumeration issues of earlier attempts, so devices feel genuinely local.

It is built for low-bandwidth USB devices. High-bandwidth devices — sound cards, cameras, webcams and fast storage — will not work, because the ESP32-S3 inside the SLZB-U2L is Full-Speed (12 Mbps) only. It also runs over plaintext USB/IP, so keep it on a trusted LAN.

Get it

Grab the firmware, the SMLIGHT USB Manager and the full manual from the project repository, or see the product page for the overview.