Vitoconnect OPTO 2 doesn't reconnect after losing Wi-Fi or after reboot

[driesken]

Hi,

Sorry for posting this in English, but Viessmann support Belgium is unable to provide an answer (nor is it wel written).

I've recently bought a Vitoconnect OPTO 2 and got it working pretty quick. Unfortunately, after a reboot the unit is unable to boot successfully. Only a red Wi-Fi led remains steady.

I'm able to ping the device however and a packet capture shows that it is frequently trying to update it's time with some external NTP servers.

Re-provisioning the controller after I've put it into AP mode (by pressing the front button for 5 seconds) doesn't result in a succesfull boot. I have to reset it to factory defaults first by pressing the side button for 30 seconds. After that, the controller is working perfectly until it becomes unavailable again after a few days.

My Wi-Fi setup is very decent (Ubiquiti UAP Pro) and all my other devices are working just fine.

Any advice if this could be fixed in an upcoming firmware release? Thanks

[Patrick_Zarges]

Hi driesken, I sent you the operating instructions by email. Page 24 explains how to reset the network settings. Please try this.

Greetings
Patrick 

[driesken]

Hi Patrick,

I've reset the network settings several times before. Unfortunately this doesn't seem to help in making the Vitoconnect available again (LED keeps going red). I can ping the device though and I can see it's attempting to correct it's time by sending NTP requests. Only thing for now is a full factory reset each time.

[driesken]

I've given up. I've tried connecting the OPTO 2 to another accesspoint (can ping the device) but still a red WiFi led. Shame that I've paid a lot of money for such a useless device.

[driesken]

I've managed to find a solution!

I did a packet capture of what the Vitoconnect is trying to access. Looks like it is trying to sync it's time using NTP with source port 123. As my provider is blocking this port on the WAN side, it's unable to retrieve the time succesfully.

I've masquered these ports in my router (Ubiquiti USG) and redirected them to an internal NTP server instead.

My advice to Viessmann would be to NOT use source port 123 but instead use one in a different range.

Hopefully this might help someone.

[Slaj]

Thanks. I have exactly the same problem. Viessman Vitodens 200W worked perfectly fine for a year and the suddenly drops connections and can not reconnect. All other devices at home are working fine, the signal quality is good. Seems like a software problem. This is ridiculous for that price. Viessman please fix these bugs!!!

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[CustomerCareBen]

Hello Slaj,

in our community we only support in German and only heating systems and components which are produced for the German market. If you need support in your native language or support for a system which is not produced for the German market, please tell us where you are from an we will give you the contact details of our competent colleagues in your region.

Greeting Benjamin from the Customer-Care-Team