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How to Connect Device

πŸ”Œ Device Connection Types​

DejaOS devices come in two connection types:

Type 1: Direct USB-A Cable​

Some devices come with a built-in USB-A male connector cable. Simply plug the USB-A connector directly into your computer's USB port.

Device with USB-A Cable

Type 2: USB Type-C Receptacle​

Some devices feature a USB Type-C receptacle. For these devices, you need to use a USB Type-C to USB-A data cable to connect to your computer.

Device with USB Type-C Receptacle

Cable Requirements:

  • You can purchase a USB Type-C to USB-A data cable
  • Alternatively, you can use a standard Android phone data cable (USB Type-C to USB-A)

USB Type-C to USB-A Data Cable

Note: After connecting the cable to the device's Type-C port, plug the USB-A end into your computer's USB port.

βœ… Verify Device Recognition​

DejaOS devices are HID (Human Interface Device) devices. When connected, the operating system typically does not show a popup notification. You need to manually verify that the device has been recognized. This is not a required step, but it can help you confirm that the device is properly connected.

Windows​

  1. Open Device Manager (press Win + X and select "Device Manager")
  2. Expand the "Human Interface Devices" category
  3. Look for "HID-compliant device" in the list

Windows Device Manager

If you see "HID-compliant device" listed and Id is 0x0525, your device has been successfully recognized.

macOS​

Method 1: system_profiler​

  1. Open Terminal
  2. Run the following command: 
    system_profiler SPUSBDataType
  3. Look for a device entry with:
    • Product ID: 0xa4ac
    • Vendor ID: 0x0525

macOS USB Device Check

If you find a device matching these IDs, your DejaOS device has been successfully recognized.

Method 2: ioreg (HID device nodes)​

To inspect AppleUserHIDDevice entries and quickly confirm the DejaOS HID Gadget, run:

ioreg -n AppleUserHIDDevice -l | grep -E "ProductID|VendorID|Product" | awk -F"= " '{if ($1 ~ /ID/) printf "%s= 0x%x\n", $1, $2; else print $0}' | grep -B 3 "0xa4ac"

If the output includes ProductID = 0xa4ac and nearby VendorID is 0x525 or 0x0525 (same value; leading zero may be omitted), often together with USB Product Name / Product = HID Gadget, the DejaOS device is recognized. Duplicate blocks in the output are normal because ioreg nests the same properties at multiple levels.

πŸ” Troubleshooting​

If your device is not recognized:

  1. Check the USB cable connection - Ensure the cable is firmly connected at both ends
  2. Try a different USB port - Some USB ports may not provide sufficient power
  3. Try a different cable - If using a Type-C device, ensure the cable supports data transfer (not just charging)
  4. Check device power - Ensure the device is powered on
  5. Restart your computer - Sometimes a system restart helps with device recognition

πŸ“˜ Next Steps​

Once your device is connected and recognized: