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Usb Vid-214b Amp-pid-7250 Amp-rev-0100 Official

  • Inspect descriptors to determine:
  • Check product strings (iManufacturer, iProduct, iSerial) for vendor/model names.
  • If device exposes vendor-specific interface, try to find an open-source driver or reverse-engineer control messages using usbmon (Linux) or Wireshark with USB capture.
  • Look for firmware update endpoints or DFU mode (interface with DFU class or vendor-specific flashing commands).

    • If your device is a DVD writer, corrupted filter drivers are the #1 cause. Warning: Editing the registry incorrectly can break your system.

    For rare cases involving REV-0100 chips, Huaxu released a firmware update tool that forces the chip into a compliant mode. Use only if the device is unusable.

    This combination appears in:

    Related search suggestions: (vendor lookup, usb audio class, lsusb example)

    Based on the hardware identifiers provided, here is the "story" of your device:

    The string "USB VID_214B PID_7250 REV_0100" is the digital fingerprint of a Huasheng Electronics USB 2.0 Hub. The Identity usb vid-214b amp-pid-7250 amp-rev-0100

    Vendor ID (VID) 214B: This identifies the manufacturer as Huasheng Electronics.

    Product ID (PID) 7250: This specific ID is almost exclusively used for their 4-port High-Speed USB 2.0 Hub controller.

    Revision (REV) 0100: This indicates the first firmware version (v1.00) of the chip. Where You’ll Find It

    You aren't likely to see "Huasheng" on the box. Instead, this internal chip powers various affordable, third-party peripherals, including:

    USB Switches: It is the brain inside AIMOS AM-UK404 4-in-4-out KVM switches. Inspect descriptors to determine:

    Budget Hubs: It often appears in generic 4-port expansion hubs like those from GINZZU (specifically the GR-315UB model).

    Embedded Systems: It is frequently used to add extra ports to Raspberry Pi setups or other small Linux-based projects. Common "Plots" (Issues)

    If you are looking this up because of a technical problem, users commonly report:

    Intermittent Connection: These chips can sometimes be picky with power. If it’s failing, it might show up as an "Unknown USB Device" in Windows Device Manager or fail to boot properly on a Raspberry Pi.

    Speed Caps: While it claims "High-Speed," it is strictly a USB 2.0 device, meaning its maximum theoretical transfer speed is 480 Mbps. If your device is a DVD writer, corrupted

    Are you trying to fix a connection issue with this hub, or are you just curious about what's plugged in?

    USB hub only recognised intermittently - Raspberry Pi Forums

    It is highly unusual to write a "long article" about a specific USB hardware identifier string like USB VID-214B & PID-7250 & REV-0100. Typically, this string appears in Windows Device Manager when a driver is missing, or in USB debugging logs.

    However, treating this as a technical deep-dive and troubleshooting guide, here is a comprehensive article for IT professionals, hobbyists, and users encountering this exact hardware ID.

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