error connecting to KNX device

Francois Lesueur

7 years ago
updated 6 years ago
Under review

Hello,

I'm getting many "error connecting to KNX device".

On my first system (Grinder), this is happening from times to times, for a very short period of time (<1 min).

This is not impacting the good operation of the system, except if this happening when bOS needs to issue a KNX command, but that's very rare, and then I noticed an impact only once.

I thought that maybe this was linked to my IP network that needed some troubleshooting.

But I've got another system, a KNX Jigsaw, for which the KNX error connecting to device is occurring every 2 minutes ! The KNX interface being incorporated into the Jigsaw, this can't be an issue with my environment.

I'm not using KNX on this Jigsaw, so I just disables the KNX interface, and problem was fixed for me.

Still I would like to understand how to fix these "error connecting to device" incidents.

I'm also getting them from times to times for all IP-connected devices: global Caché, Philips Hue, Denon amplifier, etc...

Thanks,

François

Replies 27

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Guillem Morey

7 years ago

Are you usink KNX or not?, if you don't use KNX you must disable KNX device.

Regards

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I'm not using it on my Jigsaw, so I turned it off.

I am using it on my Grinder, and I am getting the error connecting to device messages

How do you connect to KNX, by USB or IP? if is IP what sort? Tuneling ,routing ? have you checked that both devices are in the same IP range?

Both Grinder and KNX IP gateway are on the same LAN : Grinder is on 192.168.0.24, and the gateway is on 192.168.0.21

Any update ?

Joachim O

I'm having similar issues on my JigSaw. Even got a new device from ComfortClick without it resolving my issue. Did you resolve your issues?

Hello, I didn't have the "wrongAck Sequence" message ; so, I don't think that is the same issue.

And this isn't happening as often as you ; only once or twice a day

The wrongAck message has started more recently. It doesnt give any more information so I'm not sure what it is.

I'm administrating another building with a JigSaw and it has a more similar issue like yours:

These are the only messages between 17/01 and today. Seems like it's more normal than not? Both are running server v.4.4.4

Jürgen Jürgenson

Hey

I'm having similar problems. IP gateways go offline for ~30sec then they come back online. This all happens seemingly on random times and quantities. Im using mainly Weinzierl 731. But on another object we used Siemens N148/22 and they are acting the same way.

Log for the 731 gateway

Log for the N148/22

My knx timing settings are default right now. Read timeout is 3000ms and Write Telegrams per Second is 10. Should I change them to slower values?

So far I haven't noticed any problems with this if they come back online they function just fine, but I contacted our reseller for the gateways and they said they have never had this problem before. All devices are configured to static IPs and all are behind a Mikrotik switch and router and there is no ip conflicts or networks restarts. I've also checked the ETS diagnostic's and found no errors.

I've got exactly the same issue. I'm not sure this is KNX gateways related because I'm having similar issues on all IP-controlled devices : Hue bridge, Global Caché, Denon amplifier, etc...

Was using before another smart home box, and I didn't have the problem at all. So I would tend to think this is an issue with the way bOS is communicating with the IP network.