CONBEE II periodically disconnecting


I have an Ubuntu server running node red which connects to my CONBEE II gateway via deCONZ. The deCONZ is running in a marthoc/docker container.

Specifications are as follows:

  • Host system: PC

  • Running method: Ubuntu / Marthoc Docker container

  • Firmware version: (26660700)

  • deCONZ version: (2.12.06)

It all works fine, then after a few hours node red and my PC lose connection with the CONBEE gateway. On the gateway home page I see “Not connected” next to Firmware.

This has happened a few times. I have to reboot the computer for it to come back.


deCONZ log for this are at this link:

Also after a period of time, my device disappeared from the web interface (although the firmware is still connected at this point).

deCONZ log for this are at this link:

Are you using a extension cable?

Yes I have one now and will try it, but now I cannot find my light switch. I enter the light switch into pairing mode and search for it with the CONBEE II. The light switch turns off (appears to have been discovered), but the light switch does not show up in the search?

I tried to flash the firmware using the instructions here:

and I get the following error:

952: Error: failed to open device, status: Is a directory (11)

Flashing Error! Please re-run this script…

Can you please share the full command that you run when attempting to flash?

sudo docker run -it --rm --entrypoint “/” --privileged --cap-add=ALL -v /dev/serial/by-id/usb-dresden_elektronik_ingenieurtechnik_GmbH_ConBee_II_DExxxxxxx-if00:/dev/ttyACM0 -v /lib/modules:/lib/modules -v /sys:/sys marthoc/deconz

Can I flash it using my windows 10 machine instead? Or must this be flashed on linux?

You can use any of the methods listed here:

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Also please make sure not to use a USB 3.0 port. These ports causes interferences.
Another question is: do you run any other USB devices like dongles, repeater etc.?

Thanks for the replies. I only have USB3 ports on my motherboard, so I have purchased a USB2 extension cable and will use this. Will this suffice? I only have a USB wireless keyboard dongle plugged in to the PC.

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I guess this will be enough. Try then the method that senilio had already posted.