Deconz-rest-plugin: Bricked ConBee II after firmware update timeout

The device can't be bricked, since the bootloader is static.

Can you please try with the following call:

sudo GCFFlasher_internal -d /dev/ttyACM0 -t 60  -f /usr/share/deCONZ/firmware/deCONZ_ConBeeII_0x264a0700.bin.GCF

Thanks for that quick reply. I will try to flash it during the "conneted" state.

Maybe I misunderstood / explained it bad. The problem is on both my linux (debian), that I can see the device /dev/ttyACM0 and then it disappears:
I connect the device and spammed:

$ ls /dev/ttyA*
/dev/ttyACM0
$ ls /dev/ttyA*
ls: cannot access '/dev/ttyA*': No such file or directory
$ ls /dev/ttyA*
ls: cannot access '/dev/ttyA*': No such file or directory
$ ls /dev/ttyA*
ls: cannot access '/dev/ttyA*': No such file or directory
$ ls /dev/ttyA*
/dev/ttyACM0

etc... In windows I have the same issue. Device Manager keeps refreshing every couple seconds, additionally to connect/disconnect notification sounds.

Edit: Adding Info: I connect it on an Raspberry Pi 4 and have the same experience.
Listing $ lsusb will output Bus 001 Device 004: ID 1cf1:0030 Dresden Elektronik and after some short time frame $ lsusb will not output the device.

hmm on Linux, can you please try to:

• Unplug the ConBee II
• Start the above command (with -t parameter)
• Plugin the ConBee II again

Are there any other USB devices connected (on Linux)?

Can you please try with the following call:

sudo GCFFlasher_internal -d /dev/ttyACM0 -t 60  -f /usr/share/deCONZ/firmware/deCONZ_ConBeeII_0x264a0700.bin.GCF

with -t parameter fixed it!

I got following Output:

GCFFlasher V3_13 (c) dresden elektronik ingenieurtechnik gmbh
Reboot device /dev/ttyACM0 (ConBee II)
R21B18 Bootloader
Vers: 2.07
build: Jun 17 2019
unlock!  (148 ms)
flashing 158985 bytes: |=======error: timeout flashing firmware after 3003 ms
Reboot device /dev/ttyACM0 (ConBee II)
Reboot device /dev/ttyACM0 (ConBee II)
Reboot device /dev/ttyACM0 (ConBee II)
R21B18 Bootloader
Vers: 2.07
build: Jun 17 2019
flashing 158985 bytes: |==============================|
verify: .
SUCCESS
Wait 10 seconds until application starts

Thanks!