Lost contact with all devices after changing USB port

Configuration Zigbee
1

Hello.

Setup:
ZigBee2MQTT
Sonoff USB ZigBee stick (TI CC2652P + CP2102N)

I recently moved my HASSOS from SD Card to SSD. The SSD is now using the USB port that the Sonoff stick originally was plugged into. After moving the stick to a new USB port and restarting HA I have now lost contact with all my ZigBee devices. Network key etc. is identical. The path so the USB stick has not changed; it is still /dev/ttyUSB0. What is even stranger is that two new ZigBee devices that I do not own, have shown up in the list… Whenever I try to send a command or read an attribute from a device I get ‘No network route’ (205))’. Have tried turning all devices off by removing power from them. Could changing the USB port account for this effect?

2

Have you tried using /dev/serial/by-id/ ?

https://www.zigbee2mqtt.io/guide/configuration/adapter-settings.html

3

Do you use an USB extension cable ?

No, but the interference of a SSD in an USB 3 port could.

1 Like
4

Tried both the suggestions above:

  1. Using the by-id device path did not help.
  2. Trying a different USB port or and extension cable did not help.

Since I moved to a new disk I did the standard backup, write new image, and the restore from backup on the HA startup screen. I have compared the coordinator_backup.json file from the old SD card with the new one, and they match. Is there anything that could have been lost in the config that could account for this?

5

Happenned to me before when I was changing stuff. Just look up the new address in

Settings → Hardware → All Hardware → find the device → copy path
and update the serial port zigbee2mqtt addon with the path

6

Thanks. Yes, I verified the path and it has been correct all along. There is something else going on here…

7

So after walking back all hardware changes I did, it turns out that this is in fact an interference issue. The USB extension cable I used was not long enough or not shielded well enough. When it was clear that interference was the issue I tried an even longer cable, and some tin foil tricks and now the network is back. Thanks to everyone that replied and offered suggestions. Now I have to find a good shielded cable to use.

1 Like
8

Good you got it fixed!

I was following this thread because of being curious for the cause of your problem.
@francisp was spot on! :+1:

A zigbee network can work really well but it’s important to set it up the right way.
To be honest, I started with zigbee without much knowledge and you learn as you go, sometimes the hard way when a lot of your smart devices don’t work anymore.

I don’t know if you have seen this but it’s advisable to read for anyone new to zigbee:
Guide for Zigbee interference avoidance and network range/coverage optimization

Maybe it’s not bad to add that link to your OP or the solution so this thread becomes even more interesting for anybody with a similar problem.

9

For completeness I would also like to add that it was not USB interference itself that was the issue. I added an X825 V2.0 SSD shield to the PI, but the issue was not resolved until I actually removed that board altogether. Even having it just provide power to the Pi was enough to break ZigBee when the ZigBee adapter was plugged into the Pi USB port. I removed the drive, the USB connector, but that did not help. Just having the shield connected caused the problem.

10

As mentioned, more recommend (and IMHO better) solutions here → Guide for Zigbee interference avoidance and network range/coverage optimization