Which to make the master? KNX or Loxone?

[g...@camleyphotographic.com]

I have an installation that mainly uses KNX switches, blind controller, relays and dimmers. The installation then has Loxone presence sensors, plus the app and the miniserver acts as a logic  controller.

 

I am in a quandary….

 

Should I make the KNX devices act as the master? Where Loxone simply monitors the statuses, reports them in the app and sends KNX messages to turn on/off devices. This has the huge advantage that without the mini-server go down the house continues to operate just with no automation.

 

Or, do I make the Loxone the master? Where the KNX devices become dumb and send/receive information from the central location and just respond to requests from a central authority. This means that I have created a critical component… the miniserver. If that stops, then everything stops.

 

How have other people dealt with this?

 

The loxone mini-server has zero resilience. If that fails. Then everything fails. It could be a simple as a SD card, or as complex as a total motherboard failure. Either way, without the miniserver nothing operates.

 

Working in IT I am used to critical infrastructure being fail safe. If one server fails, then another is on standby to take its place. If a host in a VM cluster dies, then a virtual machine will be automatically migrated onto another host within the cluster and the users are totally unaware anything happened.

 

George

 

[Vahur Kivaste]

That is a good topic for home automation. Is there anyting out there that has redundancy "built in"? 

For Loxone it would be to have a spare miniserver is something is to go very bad?

[g...@camleyphotographic.com]

Yes. KNX can have redundancy. You could have multiple power supplies. As each node communicates directly with each other node, via the bus, then a single component failure would not result in a total household failure. Granted, the cable is a failure point.

 

I am thinking… imagine being away and the SD card or the miniserver fails. The house is plunged into darkness. I would need to spped back and replace it.

 

Replacing a miniserver, or even rebuilding a SD card, is not something would suggest that some undertook without a bit of experience and planning.

 

G

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[L P]

I responded to this earlier today and my message has been deleted. Why? By whom?

[TomM]

Ok, don't take it personally! It was sent to spam by the Google groups bot for unknown reasons.

Do you want me to approve it now?

The admin of this group disappeared some time ago. I have moderation rights but don't use them at all because it is rarely required.  I don't have sufficient rights to be full admin nor upgrade any user to moderator or above.

Despite all this, this group continues to flourish and be very useful in a daily basis!

HTH

Tom

[g...@camleyphotographic.com]

I am looking at the Loxone help.

 

https://www.loxone.com/enen/kb/gateway-client/

 

“At the same time, fail-safety can be increased because if one Miniserver fails, the remaining Miniservers continue to perform its service.”

 

Is the the true resilience?

 

Or, is it not quite all that. For example, Tree Air, KNX and Modbus is still all tied to a single Miniserver. So, if a MS fails, then will all of its associated devices.

 

George

To view this discussion on the web visit https://groups.google.com/d/msgid/loxone-english/012d01d9b9b1%24760b9200%246222b600%24%40camleyphotographic.com.