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Firmware Uploader

ProtoTracer Firmware Uploader

Section titled “ProtoTracer Firmware Uploader”

Upload ProtoTracer firmware directly to your Teensy 4.0 or 4.1 from your browser using WebHID.

Launch Firmware Uploader

Section titled “Launch Firmware Uploader”

The firmware uploader runs as a standalone page for full functionality.

Open Firmware Uploader

Instructions

Section titled “Instructions”
  1. Download firmware - Get the latest release from GitHub (.hex or .zip)
  2. Upload file - Select the firmware file (supports .zip with multiple .hex files)
  3. Press reset on Teensy - The LED should turn red (bootloader mode)
  4. Click “Select Device” - Choose your Teensy from the device list
  5. Click “Upload Firmware” - Wait for the upload to complete

Troubleshooting

Section titled “Troubleshooting”

Device not appearing

Section titled “Device not appearing”
  • Make sure you pressed the reset button on the Teensy (LED should be red)
  • Try a different USB cable or port
  • Ensure no other application is using the Teensy

Upload fails

Section titled “Upload fails”
  • Check that you selected the correct firmware for your hardware
  • Verify the Teensy is in bootloader mode (red LED)
  • Try pressing reset again and re-selecting the device

Alternative: Manual Upload

Section titled “Alternative: Manual Upload”

If the web uploader doesn’t work for you, use Teensy Loader from PJRC.