strange modbus issue with custom/structure

[commentsonly]

The problem

tried to use a a rather longish structure and it fails.
if splitting it up into chunks everything works so I would believe it's a not a problem with types but something to do with the length. Or perhaps a timeout or such like.
Couldn't find any remarks about length limits, any idea?

What version of Home Assistant Core has the issue?

core-2024.3.3

What was the last working version of Home Assistant Core?

none I would remember

What type of installation are you running?

Home Assistant OS

Integration causing the issue

modbus

Link to integration documentation on our website

No response

Diagnostics information

No response

Example YAML snippet

structure: ">2H4h1L1h1H"
structure: ">1H16s3H2I1h1H1I"
structure: ">1H16s3H2I1h1H1I"
structure: ">1H16s3H2I1h1H1I"
structure: ">1H16s3H2I1h1H1I"
works if being separated into 5 sensors

structure: ">2H4h1L1h2H16s3H2I1h1H1I1H16s3H2I1h1H1I1H16s3H2I1h1H1IH16s3H2I1h1H1I"
fails if trying to do it in one sensor

Anything in the logs that might be useful for us?

nothing I could think of

Additional information

No response

[home-assistant]

Hey there @janiversen, mind taking a look at this issue as it has been labeled with an integration (modbus) you are listed as a code owner for? Thanks!

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[janiversen]

Does not seem to be a bug in the modbus integration. Please remember this channel is for bugs not support.

There is a length limit in HomeAssistant in general, something like 250 characters.

[janiversen]

If you think there is a bug in the modbus integration, then please follow the guidelines, add a small configuration showing the problem, together with a debug as pr modbus integration documentation.