Debian Buster 64 bit Openhab @100% CPU with Tellstick DUO thing enabled

Add-ons Bindings
1

I am in the process of moving from Eventghost to Openhab2.
I have Openhab2 with an Ikea Tradfri router and some 30 lamps. It works just great.
Now I have installed the Tellstick binding for my Tellstick Duo.
It does work as expected in OpenHab. (I.e. I can see my thermometers and the one Nexa on/off self learning switch I have configured in Tellstick.conf works.)

However the “top” command reports >300% CPU for the openhab process and the fan runs at full speed. (I don’t know to interpret the >300% and how it can be more than 100%)

The CPU gets back to normal when I disable the Tellstick DUO thing

I am on the test branch of OpenHab2

Except for restarting openhab and the OS I have not done any more troubleshooting as I cannot think of where to start.

Any suggestions on what direction to start looking would be great.

2

The test branch of OH is currently behind the Stable 2.5. You could try that but there should not be much difference assuming you are running 2.5rc1.

3

One processor core is 100%. So in your case 3 cores is at maximum.

4

What hardware are u running your openHAB at and what Java version did you install?

5

Thanks @Bruce_Osborne Bruce_Osborne, I will try the stable branch

Ok 100% per core. That’s super, thanks gitMiguel!

My java is like follows (Tried to follow the OpenHab installation guide)

root@debian:~# java -version
openjdk version “1.8.0_232”
OpenJDK Runtime Environment (Zulu 8.42.0.23-CA-linux64) (build 1.8.0_232-b18)
OpenJDK 64-Bit Server VM (Zulu 8.42.0.23-CA-linux64) (build 25.232-b18, mixed mode)

I’m running on a HP EliteBook 2570p (5+ years old laptop)

6

I believe most of us use 32 bit Java. I do not know if that makes much of a difference.

7

@Bruce_Osborne, yes I read about that but as the telldus service starts and works outside of OH, I thought it could not be that. But I’ll try and install java 32 bit.
Thank you for the suggestion.

(By the way, I also changed to the stable branch and the result is still the same.)

8

Thank you for helping out.
I decided to try to compile the tellstick beta code for 64 bit and it did the trick
I followed this guide https://elinux.org/R-Pi_Tellstick_core R-Pi Tellstick core
However, I had to use the systemctl rather than init.d

I’m using this /etc/systemd/system/telldus.service file

    [Unit]
    Description=Tellstick service daemon
    After=multi-user.target

   [Service]
   Type=forking
   ExecStart=/usr/local/sbin/telldusd

   [Install]
   WantedBy=multi-user.target

And here is my very simple /etc/telldus.conf file
Note that you can find the Tellstick serial number with dmesg

user = "nobody"
group = "plugdev"
deviceNode = "/dev/tellstick"
ignoreControllerConfirmation = "false"
controller {
  id = 1
  name = "DUO"
  type = 2
  serial = "A501WF7H"
}
device {
  id = 1
  name = "Example device"
  protocol = "arctech"
  model = "codeswitch"
  parameters {
    house = "A"
    unit = "1"
  }
}
device {
  id = 2
  name = "2-2 Shower Switch"
  protocol = "arctech"
  model = "selflearning-switch"
  parameters {
    house = "2"
    unit = "2"
  }
}
device {
  id = 3
  name = "2-3 Office Ceiling"
  protocol = "arctech"
  model = "selflearning-dimmer"
  parameters {
    house = "2"
    unit = "3"
  }
}
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