Z-Wave Serial Controller offline?

  • Platform information:
    • Hardware: Synology DS216Play
    • OS: Linux
    • Java Runtime Environment: Java8
    • openHAB version: latest, installed today.
  • Issue of the topic: please be detailed explaining your issue

When I add my Aeotec z-stick gen5 to Things It won’t connect to the port.
I get this error: Status: OFFLINE - COMMUNICATION_ERROR Serial Error: Port {0} does not exist

I have used SSH to check the ports with “ls /dev/tty*”
And when pluggin the stick back in, one extra port shows up, called /dev/ttyACM0

But running this command tells me there is no such directory.
laurenz@Synology:~$ ls -l /dev/ttACM0
ls: cannot access /dev/ttACM0: No such file or directory

I am still new to my synology and using SSH.
However after 3 hours of troubleshooting I decided to ask for help. Thanks in advance!

I did see this comment: Z-Wave serial controller is offline
But I have no idea how I can create this step:
// create ‘/lib/udev/rules.d/openhab-zwave.rules’

you mis-typed - it should be /dev/ttyACM0 (you missed the ‘y’)

1 Like

You are right, how stupid of me.
Now I get this result:

laurenz@Synology:~$ ls -l /dev/ttyACM0
crw------- 1 root root 166, 0 Mar 11 09:41 /dev/ttyACM0

It’s because the device doesn’t have the right rights so it can be accessed.

i suggest you see the link below, which is how I did it on a DS214play.

Thank you for your help DSTM.
I found these instructions in another thread.
But I don’t know how to do this step.
// create ‘/lib/udev/rules.d/openhab-zwave.rules’

How can I create these folders and files? Or where can I find the /lib/ folder?
Is this all through SSH, FTP or the NAS web interface?

It requires UNIX knowledge you seem to don’t have (keywords chmod, vi etc).
Unfortunately some of this is even specific to Synology Linux which all by itself already isn’t really standard UNIX. Plus Synology openHAB packages aren’t up to date.

So as a well-meant advice: consider moving away from Synology before you invest too much time.
Go for a RPi with openHABian instead.

Hi @Zweetkonijn

I can only encourage you to what Markus said

I was also trying to have it running on my syno. But decided to have it run on another peace of computer that I didn’t use anymore.


The reason I tried to go with my Synology is because I heard openhab can be slow some times on a RPi.

What’s the speed difference between running openHAB on a DS216 vs RPi 3 B+ ? Or is this similar?

They’re similar and Synologys suffer from the same problems as do RPis. A RPi is even faster in fact.

OH on a RPi IS well fast enough as long as you pay attention to a couple of things.
Most important, you mustn’t interactively edit items and rules files (unless you’ve completely understood what’s going on then).
Startup also takes long (but once running there’s no need for a restart so simply ignore that).

Both of these are actually OH problems not RPi ones. They just are more visible on RPi than on faster machines.