Firmware Updates
The Firmware Upgrades tab downloads released device firmware and flashes it — through the docking station for the VT04 family, or directly over USB for the Nanotag.
The Firmware Upgrades tab: pick the device type, download a release from the feed, then Flash.
- Open Firmware Upgrades and pick your device type (VT04-VESPER, VT04-PP, KOL or Nanotag). The release list filters to that product, showing each release's version, name, release notes and publish date.
- Select a release and press Download. Firmware comes from the official release feed over HTTPS and every download is integrity-checked (SHA-256) before it can be flashed.
VT04-VESPER and VT04-PP share the same firmware — the board is auto-detected at runtime — so the same releases appear under both device types.
These devices flash over USB DFU using the ST system bootloader, and the whole boot-mode dance is automated by the docking station:
- Connect the dock and seat the device in it.
- With a downloaded release selected, press Flash.
- The app powers the device through the dock, holds the boot-select line and pulses reset — the device re-appears as an ST DFU bootloader, the firmware is written and verified, and the device is reset back into normal operation.
- The progress bar runs from entering the bootloader through writing to the final reset. When it completes, the device boots the new firmware.
Supported firmware file formats: .dfu (DfuSe), .hex (Intel HEX) and raw .bin images. Images are automatically padded and aligned to the STM32U5's 16-byte flash programming granularity before writing — no preparation of the file is needed.
During the flash: leave the device seated and the dock plugged in. If the process is interrupted or fails, the device cannot be bricked: the boot line is always restored and the device stays recoverable through its ROM bootloader — simply run the flash again.
First flash on a Windows machine: the very first time the bootloader appears, Windows may take a while to bind its driver — the app waits up to 20 seconds. If it consistently reports that a DFU device was detected but could not be opened, install the "STM32 BOOTLOADER" WinUSB driver (included with STM32CubeProgrammer) once.
The Nanotag uses a USB-HID bootloader and needs no dock:
- Connect the Nanotag over USB.
- Select the downloaded Nanotag release and press Flash.
- The app commands the tag into its bootloader, programs the image, verifies it with a CRC check, and restarts the tag into the new firmware.
Nanotag firmware is distributed as Intel HEX (.hex) files.
- Reconnect / re-detect the device and confirm the reported firmware version.
- Device configurations are independent of firmware, but after a major firmware upgrade it is good practice to reload and re-save your configuration (Configuration Editor) and run a mic health check.