[SOLVED] Conbee II stopped adding devices

SOLVED

SOLUTION
The issue has been solved. I emailed phoscon and below are the steps I followed (I suspect that the USB3.0 was the issue). I feel like that info should be more prominent on the website (maybe I missed it, but I did check a lot of places):

  1. Use the ConBee II on a USB extension. (Important!). Especially when other USB 3.0 devices are connected. Their distance to the ConBee II is then crucial.When using the RaspBee II use other USB devices on a USB extension.
  2. Connect the ConBee II if possible to a USB 2.0 port (via an extension) (not blue).
  3. When using a Raspberry Pi, the original power supply is required to guarantee a stable gateway. Only this power supply delivers 5.1V and 2.5A (Raspberry Pi 3B+) respectively 3A (Raspberry Pi 4B). And it definitely has good quality.
  4. in the Phoscon App under Menu > Gateway > General > Firmware there must be a version in the format 26xx0700 - and not “Firmware not connected”.
  5. To add devices the Phoscon App must be open only once - not again in other tabs/browsers or on other devices in the local network.
  6. possibly not current data is displayed in the WebApp. Here it helps to open the Phoscon App again in a private tab. Alternatively, cache and app data can be cleared in the browser.
  7. Only one of the two services may be running (headless or GUI):$ sudo systemctl statusdeconz $ sudo systemctl status deconz-gui Instead of status, start/stop can be used to start or stop the corresponding service. With enable/disable instead of status the service will be activated for the next reboot.
  8. the current deCONZ version 2.11.5. stable or 2.12.0. beta should be used
  9. the current firmware 266b0700 for the ConBee II should be used. deCONZ must be closed for a firmware update via GCFFlasher - see instruction steps. For the RaspBee II the current firmware version is 26690700. For ConBee I and RaspBee I it is 26390500.
  10. disconnect ConBee II, wait 10 seconds, reconnect, wait 10 seconds.
  11. don’t plug in any other USB devices for testing
  12. restart computer
  13. what does lsusb show under Linux?
  14. what does sudo GCFFlasher_internal -l show?
  15. it may help to rewrite the firmware. This can also be done on a separate system like Windows or Raspbian.