1. Always think twice

Please have a look at the RDR Firmware Changelog to find out if a new firmware does fix an issue or adds functionality you need.

It is never recommended to update a system that is running as expected.


2. Firmware Update using a Batch-Script

Contact your reseller for getting the latest DFU archive for your device. 
Your reseller will support you with the update process.

If you have purchased the device directly from Parametric, please write to and specify the serial number of the device.

Put device into DFU mode

  1. Connect USB-MicroUSB cable on the RDR side
  2. Press and hold the BOOT Button 
  3. Plug-in the USB-Cable on the PC side while still holding the BOOT Button

Device will enter DFU mode. No LEDs blinking and you should find either "STM Device in DFU Mode" or "STM BOOTLOADER" in Windows Device Manager under USB Devices. 

Start Device Firmware Update

Unzip the RDR Firmware Archive to a temporary directory.

Find the device model (printed on the type plate) and double-click on the BATCH-script that matches best.

if you have a ...Execute ...










You should see following window when DFU starts. 

Disconnect USB cable after update and re-insert batteries.


Windows USB Driver Issues

If you plug in a device, for the vast majority of Windows users the driver installation just works fine. 

However, for some of our customers the automatic driver installation does not work or an old driver is still installed and needs to be removed. It is definitely not fun to fumble around in the driver hell of Windows. Therefore we recommend using the Zadig Tool to clean up.

Install WinUSB Driver with Zadig

Zadig is a Windows application that installs generic USB drivers, such as WinUSB, libusb-win32/libusb0.sys or libusbK, to help you access USB devices. It is also useful to uninstall broken drivers.

  • Download Zadig from here:
  • Open Zadig and choose Options>List All Devices to show all USB devices
  • Connect your device while holding the BOOT button
  • Select "STM32 BOOTLOADER" or "STM32 Device in DFU Mode"
  • Select "WinUSB" and press the "Replace Driver" button
  • Try again with the update procedure above

Further Issues

Our updaters use the DFU mechanism integrated in all STM32 microcontrollers.

DFU mode is started by holding the "BOOT" button while powering the device. 

When device is in DFU mode you should see  "STM Device in DFU Mode" or "STM32 BOOTLOADER" under USB-Controller when opening Windows Device Manager.

If this is not the case please follow all steps below before contacting Parametric's Support.

  • Use Windows 10
    Our tools are developed and tested with Windows 10 (64Bit) only.

  • Admin Rights
    Make sure your account does have the rights to install device drivers. Check with your PC Admin.

  • Connect USB cable directly
    Do not use an USB extension cable or USB hub between your PC and the device.

  • Use another USB cable
    Retry with another USB-to-MicroUSB cable as your cable could be broken or of bad quality or does not have the data lines at all.

  • Use another PC
    Please try the same procedure with another PC or notebook.

  • Try with another device
    If you do have another device handy, try the same procedure