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Firmware Update

New firmware can be checked and installed now through druid. Make sure you have the latest version which supports this feature.

Linux / Mac OS

With crow connected to your computer, open a terminal and execute:

druid firmware

You should see something like this:

Checking for updates...
>> git version 2.2.0
>> local version:  2.0.0
Downloading new version:
Crow bootloader enabled.
File: crow.dfu
    b'DfuSe' v1, image size: 304605, targets: 1
    b'Target' 0, alt setting: 0, name: "ST...", size: 304320, elements: 1
      0, address: 0x08020000, size: 304312
    usb: 0483:df11, device: 0x0000, dfu: 0x011a, b'UFD', 16, 0x03737ae6
Writing memory...
0x08020000  304312 [=========================] 100% 
Exiting DFU...
Update complete.

If you see command not found: druid, then please confirm that you’ve completed druid’s preparation and installation.

If you continue to see command not found: druid, there’s a chance that your installation was added to your PATH under a different shell (likely either bash or zsh). You can confirm your shell by executing echo $0 in Terminal, which will return either -zsh or -bash, depending on the current shell. To switch between them, use one of the following commands:

  • to switch to bash: execute chsh -s /bin/bash, enter your password, and restart Terminal
  • to switch to zsh: execute chsh -s /bin/zsh, enter your password, and restart Terminal

Once you’re back in the shell you used to install, you should be good to go!

If you see Error: No such command 'firmware', you first need to update druid.


Before updating crow you’ll need to install the driver for crow’s bootloader, and the libusb1 DLL file so that the PowerShell can talk to crow’s bootloader.

NB: If you’ve previously installed & used dfu-util you should be able to run druid firmware in PowerShell.

Install the WinUSB driver using Zadig

  • put crow in bootloader mode: open druid, send ^^b (crow will disconnect from druid), enter q to quit.
  • download Zadig
  • open Zadig and from Options check "List All Devices"
  • select crow: dfu bootloader from the list (if you see crow: telephone line then crow is not in bootloader mode)
  • for the current driver, you should see None or STTub30 (v3.0.4.0)
  • to the right of the green arrow, you should have WinUSB (v6.1.7600.16385) (if you don’t, please select it)
  • click the Replace Driver button and wait a few minutes for the process to complete

Install libusb.dll

  • download libusb1.dll
  • make a folder in your user directory called Drivers, eg: C:\Users\Trent\Drivers
  • add the new Drivers folder to your PATH variable. Instructions here.
  • extract the DLL file, and place it in the folder you just created

Update the Firmware

  • Open a new PowerShell as Administrator
  • Run druid firmware and watch your crow absorb new knowledge

If you see Error: No such command 'firmware', you first need to update druid.


To check the current version inside of druid, type ^^version into the command line.

Manual Update

If you have trouble, see the manual update.