realKNX O-two

630.00 1,190.00  ( 1,190.00  excl. tax /// 1,428.00  incl. tax)

Select realKNX O-two out of two possibilities:

  • realKNX O-two package consists of:
    • Smart KNX speaker/microphone unit for ceiling mounting (choose between round or rectangular)
    • KNX proServ
  • Only realKNX O-two Server:
    • Smart KNX speaker/microphone unit for ceiling mounting (choose between round or rectangular)

realKNX O-two can be supplemented with Satellites such as:

Click here for a tabular overview of the possible combinations

Powerful functions configured in ETS:

  • Offline voice control without cloud or internet access
  • Voice control and query of KNX function with Siri
  • Operation via augmented reality
  • Graphical logic programming with Node-RED, no programming knowledge required
  • Customizable HTML dashboard for operation and visualization
  • App visualization for iOS and Android
  • Please note: Unlike realKNX Air , Alexa and Google Home is not supported by this system. Please visit this product site if you want to use those additional assistants.

Please ask for pricing of our Pro edition for public buildings (hotels, hospitals…)

Voice Control for Hotels

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realKNX O-two Offline Voice Control, Node-RED, Augmented Reality and Visualization all-in-one

realKNX O-two is an autonomous and Offline Voice Control System for Hotels and Meeting rooms. The system consists of one or more ceiling mounted units and one KNX-proServ.

The combination of the smart speaker/microphone and the proServ enables all the features and services described below.  With this solution there will be no hidden or extra costs. Once installed, it will continue to work and never break because of cloud service failures or changes.

Installation example

realKNX – Offline Voice Control with Snips

The vocabulary of this AI based offline Voice Control system is generated dynamically from the configuration data for rooms and functions. The privacy is guaranteed and by design: what you say at home stays at home. Another advantage with the new offline voice solution is the installation stays independent of cloud services, automatic updates and Internet accounts.

The configuration of the realKNX voice control is automatic. As soon as the realKNX O-two speaker has access to the KNX proServ, he reads out all the KNX functions and zones, which were configurated in a standard ETS product data base. They are translated without any further interaction and in less than a minute.


realKNX dispose of “artificial intelligence” and enables as the first offline Voice Control the dynamic generation of vocabulary from the configuration data of ETS. Therefore, the unique configuration of the product data base of the proServ is enough to run the offline voice control.

Why offline Voice Control?

  • Privacy is guaranteed and by design. No voice recordings will ever leave the house!
  • Voice recordings are not transferred from the house to an Internet cloud service, everything runs on the realKNX server and work independently of an Internet connection.
  • The solution is independent of any updates unlike the common cloud assistants. Once installed, it will work unchanged for years.
  • The installation is even easier than with online cloud services. No service account setup is required.
  • The voice commands and possibilities of sentences and questions can also be adapted by ProKNX to any special requests.

Commands and queries for lighting, shutters, HVAC and media systems may be intuitively spoken in hundreds of different ways.

Examples of commands:

  • “Turn on the lights”, “Switch off the lights”
  • “It’s too cold” ,“It’s too warm”, “Set the temperature to 22 degrees”
  • “It’s too dark”, ”Make it darker”, “Set the luminosity to 50%”
  • “Let the sunshine in”

realKNX – Plug’nPlay voice control with Siri

Voice control with Siri is very easy to activate, as both the building and function structure are directly taken over by HomeKit. Only one pairing process translates and activates immediately up to 99 KNX functions.

The product has not been certified for HomeKit®.


  • Use voice recognition through Siri®  to control or query your KNX devices.
  • Use Home or other compatible apps to control.
  • Over 10 excellent iOS applications available in the App Store (e.g. Elgato Eve)
  • Use our realKNX iOS app to pair and sort all KNX devices in rooms. It is possible (but not necessary) to do the sorting or renaming manually with the Home App.
  • Secure remote access via Apple TV 4th generation.
  • Automation provided via Apple TV.
  • Creation of own scenes from paired devices.
  • Speech recognition by means of SIRI.
    • Device specific voice commands, e.g.  “Switch on the ceiling lamp in the living room” or “Set the blind in the kitchen to 35%”
    • Group voice commands, e.g. “Switch off the lamps in the living room” or “switch off the living room”.  This is possible without having to have defined scenes on the basis of KNX. In the latter example, all switches not only light but also music etc.
    • Voice commands – relative operation, e.g. “Increase the brightness in the living room with 10%”
    • Voice commands  – state queries, e.g. “What is the pool temperature” -> Answer: “The pool temperature is 23.5 ° Celsius”.
    • Voice commands  – check the entire installation, e.g. “Are the lights on in the house?” -> Answer: “Three lamps are switched on, the others are off”
    • Siri supports many languages (35+ )
  • Automation support – when configuring an iOS10 iPad or AppleTV V4 as a stationary device in the house, automated commands can be triggered. Read more on Apple support Automate and remotely access your HomeKit accessories.
  • Geofencing support – geofencing is a virtual perimeter for a real-world geographic area. Leaving or entering the perimeter can be used as trigger for automation, e.g. Trigger “Switch on lights” when entering home.
  • “RemoteConnect” is also supported – without configuration of VPN or port forwarding – you are simply connected to the installation with or without Wifi (only possible with stationary Apple TV or iPad).

realKNX – Augmented Reality for KNX

The realKNX augmented reality (AR) enables another special feature: The user can operate the KNX devices through the camera of his smartphone. If you direct the camera on an object from the real world, the corresponding controls are displayed on the screen (Like Pokemon Go).The augmented reality functionality is configured via the preinstalled realKNX designer.


A milestone in the intuitive operation of a KNX installation…

The living area can be operated through the image of a smartphone camera. When it recognize an object the associated controls are displayed.

With the lamp appears the button, after pointing on the window the controls for the shutters are visible, by recognition of a speaker the volume control is possible and the title of the current song is indicated.

A software package for an embedded miniserver enables a local data management for the different objects of the living environment. These are taught in once via the camera of a smartphone / tablet and then assigned to the devices accessible through the KNX installation.

This assignment process is object-oriented and can thereby be carried out by the end customer. The individual KNX data points of a device are already summarized in the ETS via the product database of the KNX proServ Controller, in order that one “KNX device” can be addressed as a whole.

The following functions can be controlled via augmented reality:

  • Lighting On/Off
  • Lighting Dimmer
  • Shutter
  • Heating/Cooling room controller
  • Sonos (multi room audio control)
    • Start/stop
    • Radio station selection
    • Volume
    • Current title / artist display
  • State information (values/texts)
  • Url schemes

The app on the smartphone of the final customer reads in after connection to the local Wifi these data. The app through the camera compares the actual picture with the read in data. After recognition, the associated device is connected via the KNX proserv and can be managed using the controls displayed directly on the camera image.

realKNX – visual programming with Node-RED

The extremely powerful but easy to use visual programming tool Node-RED is an additional highlight. Node-RED can easily be used for automation tasks by interconnecting function blocks. The programming of Node-RED requires no knowledge of a programming language. The user has access to our large library, which can be copied and adjusted. The library modules includes functions blocks as for example AND/ OR gates, or SMS & Push notifications on mobile phones up to complex alarm systems with unique features as dogs barking from the SONOS device. The speaker of the O-two can directly react to KNX events. For example, by speaking to the smoke alarm it will respond by giving instructions about the correct behavior in case of a fire.


One further complement to the realKNX feature list is the very powerful but yet easy-to-use visual programming tool Node-RED. Node-RED is used for building automation tasks, simply by ‘wiring together’ code blocks. It uses a visual programming approach that allows wiring together predefined code blocks (known as ‘nodes’) to perform a task. The connected nodes, usually a combination of input nodes, processing nodes and output nodes, when wired together, make up ‘flows’. Our customers have access to an extensive code library. The library demonstrates low level functionality as logical functions (AND/OR etc), SMS & Push notifications to mobiles phones, HTTP requests. We added high level functions as smart energy management modules as well as Feelgood light modules.

Due to the big Node-RED community hundreds of IoT devices are made available on the library. Likewise, it is a cinch to use the communication protocols as MQTT, IFTTT, Modbus, Enocean… Our KNX nodes allows external data points to be mapped directly to KNX.

You can also find a large number of descriptions in the internet.


realKNX – HTML Visualization with Dashboard

The realKNX Dashboard is a HTML user interface, which is automatically generated. In addition to the functions configured in the ETS, the graphs of the recorded values are also displayed. Furthermore, it can also be adapted with so-called “widgets” such as Spotify Player, webcams, calendar functions and so on.


  • The realKNX Dashboard is a modern graphical user interface that runs in most modern popular web browsers.
  • The realKNX Dashboard is Plug and Play – the default configurations are automatically generated. The default config can be regenerated at any time and can be modified.
  • realKNX Dashboard is highly customizable, choose images, icons, text size and colors, background images. Quick start from the default auto generated dashboard.
  • Two Dashboards are automatically generated, one large and one small.
  • Enables embedding of web-based components, for example: spotify web player, google calendar or weather forecast widget.

realKNX – App visualization iKnix

Already the proServ alone enables the visualization via iOS and Android app.


Functions and operation

  • The whole configuration is localy saved on the proServ controller.
  • As soon as an iPhone, iPad or android pad is connected it’s configurated within seconds.
  • Free app on the Apple store or Android market, no hidden costs or license fees.
  • Up to 10 mobil devices (Apple and Android) can drive and visualize the KNX/EIB system at the same time.
  • Different user profiles are selectable on the device.
  • No restrictions regarding the KNX functionality: You drive the lights, the shutters, the heater, load and save scenes, change temperature setpoints or operating modes, display the data of the weather station or any kind of measured values.
  • Integrate your favorite apps to visualize and control IP cameras or your music library.

realKNX – SmartCharts, Scheduler, Sonos integration…

Furthermore, O-two enables data logging with graphical evaluation “Smart Charts” as well as an extensive timer and calendar function. Music lover will appreciate the “Sonos” multiroom driver. Up to 5 Sonos-zones can be controlled via KNX commands. All these functions are invariably configurated via the the proServ ETS product database… a real Plug’n Play.


KNX data loggers, time schedules and much more …

  • Recording of arbitrary KNX data points and formats.
  • Export data as csv.
  • Web server to display the value series in the form of a curve (appeal directly via the iKnix app).
  • Tool for individual compilation of the diagrams.
  • Timer programs (call directly via the iKnix app). Try the time calendar simulator here.
  • E-mail notification on KNX alarm.
  • SONOS integration in the KNX installation.

Structure of the system

The realKNX O-two speaker/microphone needs a power connection (the power cord is delivered with the product) and an Ethernet connection. This is possible by wire or wifi.

The proServ needs a 24V (DC/AC) power supply, a wired Ethernet connection (with PoE, the auxiliary voltage can be omitted) and a connection to the KNX Bus.

It is also possible to connect several O-twos to one proServ. Please inquire if necessary.




Hotword detection, Voice recognition, Natural language understanding, hospitality and room control logic: all runs on the O-two device. That is: no internet and no cloud services are needed or required.

Product details

The smart realKNX O-two speaker/microphone device is available in two variants: round or rectangular.



  • Plastic housing with metal protection grid (paintable)
  • 3 stable retaining bolts for ceiling or wall mounting (for example lightweight walls, suspended ceilings, …)
  • Installation in walls & ceilings from 5-16mm possible
  • 5 VDC power supply (USB power adapter included)
  • Power consumption max. 1,6W, standby 1W
  • Connection via cable clamp (groove for cable)
  • Built-in broadband speaker
  • Built-in microphone array (6 microphones)
  • Ethernet and wifi connection
  • Dimensions: Outside ØxH 255x38mm, installation ØxD 228×38, minimum depth 34mm


  • Plastic housing with metal protection grid (paintable)
  • 4 stable retaining bolts for ceiling or wall mounting (for example lightweight walls, suspended ceilings, …)
  • Installation in walls & ceilings from 5-16mm possible
  • 5 VDC power supply (USB power adapter included)
  • Power consumption max. 1,6W, standby 1W
  • Connection via cable clamp (groove for cable)
  • Built-in broadband speaker
  • Built-in microphone array (6 microphones)
  • Ethernet and wifi connection
  • Dimensions: Outside LxWxH 287x197x38mm, installation 264×174, minimum depth 34mm