Lost Connection to Vitoconnect 100 OPTO1

[Mayone]

Good morning, for a few days now I've been unable to contact the Vitoconnect 100 OPTO1 module, either via the ViCare app or via HomeAssistant. I checked and the module is correctly connected to the network, and I see that the firewall sees requests to the Viessmann cloud, but nothing appears on the app or HomeAssistant. I've already tried disabling and reactivating the Wi-Fi network, but to no avail. Can you give me any suggestions? Thanks!

[knif01]

please try to power off and power on the Vitoconnect modul, for me its solved connection problems

[Mayone]

In your opinion, why did I take a remote management module? Maybe because the installation is 300 km away? Unable to disconnect power.

[Mayone]

I managed to send someone home to restart the module and it worked for a week. Yesterday, in conjunction with the update of the app on the phone, it stopped working again. Obviously the module is connected and detected by the dhcp server. Worse and worse.

[Mayone]

The issue is back (or rather, still ongoing). Here is what I have verified in the meantime:

• The Vitoconnect is connected to 2.4 GHz Wi-Fi with good signal (-57 dBm), directly to the main access point
• It has a valid IPv4 address via DHCP and is reachable via ping
• The firewall shows no blocked traffic; ports 443 and 123 are open
• The module regularly contacts mgmt.viessmann-platform.io (about every 30 minutes) and NTP servers
• However, there is no traffic at all to the Viessmann data servers

So the module is online and reaches your management backend, but it never seems to upload boiler data. The cable between the Vitoconnect and the boiler is in good condition and properly connected.

Since this keeps happening, could a Customer Care agent please check on your side:

1. whether the gateway is seen as connected
2. whether it is receiving data from the boiler
3. whether its firmware is up to date

I can send the Vitoconnect ID via private message. I am currently not on site, so a remote check would help me understand whether a power cycle is needed or whether something must be fixed on your side.

Thank you!