Send command to USB device (FingerPrint Scanner) with no driver for Linux

 Sending commands to a USB device like a fingerprint scanner with no Linux driver can be challenging and may not always be possible. However, you can try using the `usbhid-dump` tool to interact with the device at a low level and send raw USB HID (Human Interface Device) reports to it. Please note that this approach may not work for all USB devices, and you might need some information about the device's HID report structure.


Here are the general steps to attempt communication with a USB device using `usbhid-dump`:


1. **Install `usbhid-dump`:** You can install the `usbhid-dump` utility on your Linux system if it's not already installed. Use your package manager to install it, or you can compile it from source.


2. **Identify the Device:** To communicate with the USB device, you need to know its vendor and product IDs. You can use the `lsusb` command to list all connected USB devices and find the appropriate entry for your fingerprint scanner. Note down the vendor and product IDs.


3. **Record HID Reports:** Run `usbhid-dump` with the following command, replacing `VID` and `PID` with your device's vendor and product IDs:


   ```bash

   sudo usbhid-dump -esVID:PID -l 256

   ```


   This command records 256 bytes of HID reports from the device. The `-e` option specifies the vendor and product IDs, and the `-l` option specifies the number of bytes to capture.


4. **Analyze the Data:** Once you have captured the HID reports, you'll need to analyze the data to understand the format and structure of the communication. This may require knowledge of the device's protocol and documentation if available.


5. **Send Commands:** After understanding the device's HID report structure, you can use the `-y` option of `usbhid-dump` to send HID reports to the device. You'll need to construct valid HID reports to send specific commands. The exact format and commands will depend on the device and its documentation.


Please note that this process can be complex and may not work for all USB devices, especially if the device uses a proprietary or undocumented protocol. Additionally, sending incorrect data to a USB device can potentially cause issues or damage the device, so proceed with caution.


It's also worth checking if there are any open-source or community-driven projects aimed at providing Linux support for your specific fingerprint scanner, as they might simplify the process of interacting with the device.

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