Is my Conbee II bricked?

Advice
1

I recently bought a ConBee II but cannot get it running for the live of me. I’ve given up on using it for Matter over Tread and just want it to run zigbee, but I cannot get it to flash (I’ve tried MacOS, Fedora and now Debian for this). This is the output on debian:

root@pve:~/gcfflasher/build# ./GCFFlasher -l
Path              | Serial      | Type
------------------+-------------+---------------
/dev/ttyACM0      | DE2698714   | Thread_RCP__ConBee_II_

root@pve:~/gcfflasher/build# ./GCFFlasher -t 60 -d /dev/ttyACM0 -f deCONZ_ConBeeII_0x26780700.bin.GCF
read file success: deCONZ_ConBeeII_0x26780700.bin.GCF (163244 bytes)
GCF header0: magic: 0xCAFEFEED, type: 1, address: 0x00005000, data.size: 163230
flash firmware
PL_Connect
connected to /dev/ttyACM0, baudrate: 115200
send uart reset
PL_Disconnect
PL_Connect
failed to open device /dev/ttyACM0
retry connect bootloader /dev/ttyACM0
PL_Connect
failed to open device /dev/ttyACM0
retry connect bootloader /dev/ttyACM0
[...]

I’ve tried it dozens of times over various operating systems, ports, and computers, but still get the same result. I followed Update deCONZ manually · dresden-elektronik/deconz-rest-plugin Wiki · GitHub (including " What if ConBee (all Versions) still refuses to flash"). Maybe the device is just dead?

2

A similar issue recently, can you try the same trick Conbee III unresponsive and not flashable - #5 by deadmedusa

3

Thank you so much, this instantly solve my issue. I just didnt understand you need to keep the command running while attaching the conbee. I’ve edited the Wiki article slightly, but for anyone else that runs into this issue:

  • Remove the ConBee from the computer
  • Issue the command to flash, make sure you you’ve selected the correct device on your system for the -d parameter and also ensure to use -t 60 -x 3
    eg. ./GCFFlasher -d /dev/ttyACM0 -t 60 -x 3 -f deCONZ_ConBeeII_0x26780700.bin.GCF
  • Keep the command running
  • Attach the ConBee again