Bonjour Apres des galeres j’ai enfin trouvé comment mettre à jour cette 
cle
desole c’est en anglais mais pas trop compliqué
Update in Windows
Requirements
- GCFFlasher. Can be downloaded here: Index of /win/
Are you performing the update from a system, where you also have the deCONZ software running? Then continue to this chapter.
Update on a system without deCONZ software
- Unzip the downloaded GCFFlasher, you will get a folder named
GCFFlasher_Vx_x(where x is a version number). - Download latest deCONZ firmware. Check https://deconz.dresden-elektronik.de/deconz-firmware for the latest release and put it in the same folder.
- Open a command prompt in the
GCFFlasher_Vx_xfolder.
- In Windows Explorer Shift+Right Click in a free area of the folder and select « Open command window here » from the context menu. In new versions of Windows 10, select « Open PowerShell window here » - if using Powershell, you will need to add a
.\before every command. Make sure to run the PowerShell or CMD window as Administrator!
- Plug the ConBee or ConBee II in and wait 10 seconds
- List all available devices and their COM ports with:
GCFFlasher -l
GCFFlasher V3_10 (c) dresden elektronik ingenieurtechnik gmbh
Path | Vendor | Product | Serial | Type
-----------------+--------+---------+------------+-------
\\.\COM7 | 0x1CF1 | 0x0030 | DE214xxxx | ConBee II
Do not proceed, if there is no ConBee Stick listed here!
- Update the firmware. (Replace X with COM number and Y with firmware filename)
GCFFlasher -d COMX -t 60 -f Y
Example: GCFFlasher -d COM3 -t 60 -f deCONZ_ConBeeII_0x26780700.bin.GCF
- Output in Windows if flashing is successful
GCFFlasher V3_17 (c) dresden elektronik ingenieurtechnik gmbh
Reboot device COM7 (ConBee II)
deCONZ firmware version 266f0700
action: update firmware after 7166 ms
flashing 164373 bytes: |==============================|
verify: .
SUCCESS
Wait 10 seconds until application starts
Update on a system where deCONZ is already installed
Bonne chance