I have issues with my ConbeeII disconnecting from the USB port regularly, so I am trying to upgrade the firmware to a later version. I followed https://github.com/dresden-elektronik/deconz-rest-plugin/wiki/Update-deCONZ-manually with Docker and Windows, but neither of them works 
The flasher sees the com port and also detects the old firmware version, but after resetting the port … It never connects successfully.
The screenshot shows where it fails on Windows10
I tried it a few times again, also using USB 2.0 hub and (longer) extension cable, but still the same issue/outcome.
Does this mean the conbee stick is faulty?
use -t 60 -R10 options in your commande line
I tried it, but same result
Anybody has an idea? Otherwise the ConbeeII stick can go into the garbage bin?
Sry, I have overseen this notification.
First please try the newer firmware deCONZ_ConBeeII_0x26720700.bin.GCF
If the flashing still not work try the following:
start the flashing with the t -120 parameter and while GCFFLasher tries to reboot the device unplug the ConBee2 and plug it again.
Thanks, I will try this tomorrow and let you know the result (the unplug/replug I didn’t try it this way)
Cool, that worked 
thanks for the support miimiix & chrishae!
The problem seems to be solved, but just in general, just throwing something away
or giving directly up does not sound like a good idea. 
It seems the tool / stick have some issues in some scenarios. I was trying one under
debian 10 under vmware which did not work, where I could update it fine with a
ubuntu running directly on an old laptop.
