ebus adapter shield v5 not reachable after connecting ebus

[markbroeskamp]

Good evening,
I just recently received my ebus adapter shield v5 and installed it now. I use it without a raspberry, as I have another one in the network. So it is just connected to power and ebus from the Vaillant heating.
When I do not connect ebus, everything works fine, I have the adapter in my Wifi, can open the webUI and configure everything (WiFi AP off, Ethernet off, MQTT on, ebus as plain over TCP and https off).
As soon as I connect ebus from the heating, sometimes it works for some minutes and gives me readings (via ebusd on the raspberry talking via WiFi with the adapter) and sometimes it does not work at all. The problem is that I cannot reach the device. Ping, WebUI and ebusd cannot talk to the device. It seems to lose the WifI connection when ebus is active. Green RX (flashing) and blue power LED (blinking ~1 seconds) are active, so I think the device is alive...

WiFi is not great at the place where it is, but it works obviously without ebus.

Any help or hints on how to solve this? I already tried to turn off MQTT to reduce workload on the ESP32, but that did not help.

Thanks for any ideas!
Mark

[markbroeskamp]

So, I tried swapping back to firmware 20240420 just to see ... and now it works since some time.
Guess then this might need to be moved to ebus-esp32?

[markbroeskamp]

Well, no. Stopped working again yesterday on 20240420 as well...

[markbroeskamp]

swapping 20240505 and 20240420 back and forth didn't help, still no Wifi connectivity when ebus connected to the heating.

Disconnecting eBus in between does not help as well, still no connection. Needs a reboot.