KNX - no access to group address

Setup, Configuration and Use Beginners
1

Hello,
I have problems with the communication from openhab2 over KNX-IP-Router to a knx group.
I get follow log messages:

2017-12-16 11:51:14.551 [INFO ] [el.core.internal.ModelRepositoryImpl] - Loading model 'default.items’
2017-12-16 11:51:19.013 [INFO ] [el.core.internal.ModelRepositoryImpl] - Loading model 'default.sitemap’
2017-12-16 11:51:21.073 [INFO ] [.dashboard.internal.DashboardService] - Started dashboard at http://192.168.1.73:8080
2017-12-16 11:51:21.076 [INFO ] [.dashboard.internal.DashboardService] - Started dashboard at https://192.168.1.73:8443
2017-12-16 11:51:22.052 [INFO ] [basic.internal.servlet.WebAppServlet] - Started Basic UI at /basicui/app
2017-12-16 11:51:23.167 [INFO ] [arthome.ui.paper.internal.PaperUIApp] - Started Paper UI at /paperui
2017-12-16 11:51:23.414 [INFO ] [panel.internal.HABPanelDashboardTile] - Started HABPanel at /habpanel
2017-12-16 11:51:24.260 [INFO ] [nx.internal.connection.KNXConnection] - Established connection to KNX bus on 224.0.23.12:6720 in mode ROUTER.
2017-12-16 11:51:28.688 [WARN ] [ore.internal.events.OSGiEventManager] - Dispatching event to subscriber ‘org.eclipse.smarthome.core.thing.link.ThingLinkManager@1419179’ takes more than 5000ms.
2017-12-16 11:51:34.293 [WARN ] [al.bus.KNXBindingDatapointReaderTask] - Autorefresh: Cannot read value for item ‘knxItem’ from KNX bus: timeout waiting for group read response: timeout
2017-12-16 11:51:34.295 [WARN ] [al.bus.KNXBindingDatapointReaderTask] - Autorefresh: Remaining retries for address ‘2/1/2’ = '2’
2017-12-16 11:51:44.349 [WARN ] [al.bus.KNXBindingDatapointReaderTask] - Autorefresh: Cannot read value for item ‘knxItem’ from KNX bus: timeout waiting for group read response: timeout
2017-12-16 11:51:44.350 [WARN ] [al.bus.KNXBindingDatapointReaderTask] - Autorefresh: Remaining retries for address ‘2/1/2’ = '1’
2017-12-16 11:51:54.403 [WARN ] [al.bus.KNXBindingDatapointReaderTask] - Autorefresh: Cannot read value for item ‘knxItem’ from KNX bus: timeout waiting for group read response: timeout
2017-12-16 11:51:54.404 [WARN ] [al.bus.KNXBindingDatapointReaderTask] - Autorefresh: Remaining retries for address ‘2/1/2’ = '0’
2017-12-16 11:52:04.457 [WARN ] [al.bus.KNXBindingDatapointReaderTask] - Autorefresh: Cannot read value for item ‘knxItem’ from KNX bus: timeout waiting for group read response: timeout
2017-12-16 11:52:04.459 [WARN ] [al.bus.KNXBindingDatapointReaderTask] - Autorefresh: Give up, could not read address ‘2/1/2’ after ‘3’ retries.

Is the warning from the EventManager a problem?
What can I do wrong, when I want read a group address?

Thank you in advance for your ideas.

2

I had this as well, did you mark the device in the group you want to read from as “R” in the KNX ETS project?
For example I had a device (weather station) which was configured to put the temperatures on the bus when the temperature has actually changed. So the “R” flag was not set per default and I could not read with OH.
Can you see the request in the group monitor within the ETS SW?

3

Please keep in mind that the names of flags are different in german and english version of ETS:

english german meaning
   C       K   Communication (of the object with the knx bus)
   W       S   Writeable from knx bus
   R       L   Readable from knx bus (This has to be set for allowing openHAB to read the state)
   T       Ü   Transmit change of value
4

I checked and changed the flag configuration, but it didn’t work.

I made a littel test with the group Monitor:

image
image.png1347×271 44.1 KB

Message 1 and 2:
I switched a light with a knx-device (switcher)
–> it worked

Messate 3 and 4:
I switched a light with this ETS4 tool
–> nothing happened

Message 5 and 6:
I switched a light with openhab2
–> nothing happened

5

Please show your knx.cfg :slight_smile:

6

This is my knx.cfg:

ip=224.0.23.12
busaddr=1.1.80
type=ROUTER
port=6720

7

Is 1.1.80 the address of the router? openHAB has to have its own bus address (no real hardware bus address).

8

The 1.1.80 is the bus address of the router.

I solved my communication problem. I checked the filter function form the router again. I overlooked a value (group address filter from IP to KNX). I changed the configuration to transfer these telegrams. Now it’s worked.

Thank you for our help.