Stay connected with the Vitoconnect Wi-Fi module

Do you have a Viessmann boiler without built-in Wi-Fi? Use the Vitoconnect OPTO2 series Wi-Fi module to get your boiler connected to the internet, and enable smart home functionality for your existing heating system.

Wi-Fi module for Viessmann boilers

The Vitoconnect Wi-Fi module allows  smartphone and tablet users to easily monitor and operate their Viessmann boiler, and stay in control anytime, anywhere  using the ViCare app.

Vitoconnect connects directly to the  boiler control using  an  Optolink  cable, and it communicates over the Internet  via the local Wi-Fi network.  A  comprehensive  security design was implemented  for Vitoconnect, which successfully passed the VDE Institute test for smart home information security.

Save time, money and energy with remote Internet connectivity and automatic operation  via the ViCare app and Vitoconnect!

Standard equipment

  • Wall-mounted Wi-Fi module for connection to a wireless router
  • Power supply with power cord (5 ft  / 1.5 m long)
  • Optolink/USB connection cable from  Wi-Fi module to boiler control  (10 ft  / 3 m long)


  • Via the Optolink interface  on the boiler control
  • Via Wi-Fi with the wireless router


  • Power connector for  power supply (120V / 60Hz)
  • USB for connection cable to Optolink port
  • Wi-Fi communication to connect to the Internet

Please note!

  • Prior to startup, please verify the system requirements for communication  over the local  Wi-Fi network
  • Port 443 (HTTPS) and port 123 (NTP) must be open on the local network
  • A high-speed Internet connection with unrestricted data volume is required to operate Vitoconnect
  • The distance between  Vitoconnect and the boiler should be 1 - 8 ft (0.3 - 2.5 m)

Compatible controls

Viessmann boilers and Vitotronic controls equipped with the  Optolink  interface.

Controls for wall-mounted boilers:

  • Vitotronic 200, HO1 for Vitodens 200, WB2B Series
  • Vitotronic 200, HO1A for Vitodens 200, WB2B Series
  • Vitotronic 200, HO1B for Vitodens 200, B2HA/B2HB Series

Controls for floor-standing boilers:

  • Vitotronic 200, HO1B for Vitodens 222, B2TA/B2TB Series
  • Vitotronic 200, KW2 for Vitorond 100, VR1 Series
  • Vitotronic 200, KW6B for Vitocrossal 300, CU3A Series
  • Vitotronic 300, KW3 for Vitorond 100, VR1 Series

Controls for solid fuel boilers:

  • Ecotronic with software version 2.12  for Vitoligno 300-C Series

Getting started with Vitoconnect

Vitoconnect is the interface between the Viessmann boiler control and the ViCare app. For  everything to work smoothly, the Vitoconnect must first be installed and put into operation. Follow the instructions below to  set up your new Vitoconnect unit:  

1.    Mount the Vitoconnect on the wall, and ensure that the installation site  is dry and frost-proof.  Also ensure that  the Wi-Fi signal is strong enough  in the area where the Vitoconnect is mounted.

2.    Connect the cables. There are two connections located on the  bottom of the Vitoconnect  – one for the power supply, and one USB port for the Optolink cable  which connects to the boiler control.

3.    Download the ViCare app from the App Store or Google Play, and install it on your mobile device.

4.    Start the ViCare app and tap "Create account" to create a new Viessmann account for yourself. Note: User registration is required – Vitoconnect will only work with a valid Viessmann account. After creating the account, login to the ViCare app with the email address and password that you selected.

5.    When prompted by the ViCare app, scan the QR code that's on the Vitoconnect unit. If there is no QR code, enter the serial number and ID from the Vitoconnect to register it.

6.    Your mobile device should then automatically connect to the "Vitoconnect" Wi-Fi network (on Android). For iOS devices, open the Settings app and manually connect to the "Vitoconnect" Wi-Fi network (you should be able to paste the WPA2 password from the clipboard). Then you can switch back to the ViCare app.

7.    Follow the instructions in the ViCare app to finish the setup process.

The Vitoconnect unit and ViCare app should now be set up successfully. You can check this by looking at the LEDs near the top of the Vitoconnect – if there are two green LEDs, it is operating correctly.



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