OpenDTU freezes about once a day

[erwano1957]

What happened?

I have been running the OpenDTU for about 2 years. The system is currently running on an ESP32-D0WD with version v25.2.3.
The system has run flawlessly for years. For about 1-2 months now, the DTU has been freezing every 1-2 days. As a result, the display still shows values, but the system is no longer visible on the network and can no longer be pinged.
Only after a boot process does everything work again. How can I isolate or rectify this?

To Reproduce Bug

just waiting for 1 or 2 days

Expected Behavior

Not to freeze

Install Method

Pre-Compiled binary from GitHub releases

What git-hash/version of OpenDTU?

v25.2.3

What firmware variant (PIO Environment) are you using?

ESP32-D0WD

Relevant log/trace output

Anything else?

No response

Please confirm the following

• I believe this issue is a bug that affects all users of OpenDTU, not something specific to my installation.
• I have already searched for relevant existing issues and discussions before opening this report.
• I have updated the title field above with a concise description.
• I have double checked that my inverter does not contain a W in the model name (like HMS-xxxW) as they are not supported.

[Triple-S]

I have a similar problem since sometime around second half of last year. Currently I am testing different old versions to pin down which introduced the bug, but since it takes some time for the bug to occur it takes quite some time.

[kortmannm]

The same here, especially after a restart. Once it runs, it keeps running throughout the day. ESP32-D0WD-V3, self-compiled, commit a07a027, debugging not possible: "binary too large".