Hello,
I upgraded a RUT360 from 07.03.02 to 07.04.02. Everything worked fine. All clients in the network are happy. Except a Viessmann Heater device.
Symptoms:
1) the heater connects to the WLAN. Fine.
2) Then it tries to connect to the Viessmann backend. This is most probably done vie TLS/secure MQTT (Details with old IP/DNS here:
https://www.viessmann-community.com/t5/Konnektivitaet/ViCare-App-und-Vicare-Control-Wie-ist-Zugriff-auf-unsere-Heizung/m-p/124606)
3) The backend connection is only for a few seconds, Then it tries again. But it doesn't connect. On the ViCare app (for the heater control), I see short term connections, sometimes I can switch something, but most times I have old values.
4) Teltonika log: Only the Heater continuously gets an IP assigned via DHCP. Every second to few minutes.
With the old FW, no problems. Tried upgrade/downgrade twice.
No Firewall rules, no special settings.
Does anybody have an Idea, where the problem might be?
Brgds
Till