I added changelog note about embedded-nal. Not sure what should I do about MSRV, as I can't find any previous mentions of it in this crate.

By the way, smlang-rs is 0.6.0 in this project, but at 0.7.0 they made StateMachine::new and StateMachine::new_with_state const functions. This will allow Minimq::new become const too, as the rest of ecosystem has it's constructors. Current vertion om smlang is 0.8.0.

But smlang had breaking changes so it may not be worth it.

Do you plan on porting https://github.com/quartiq/smoltcp-nal as well?

If this is a requirement for merging this then yes.

• Could you add a changelog entry about the minimum required rust version due to ip-in-core?
• Feel free to bump smlang in another PR and make the constructor const! PR appreciated. We use 0.8 downstream in miniconf as well.
• The smoltcp-nal bump isn't required but appreciated as currently it's probably one of the most prominent downstream crates.

link: quartiq/smoltcp-nal#52

Is this PR waiting for something?

It needs to pass CI checks.

Added fmt commit

There is that dev dependency:

std-embedded-nal = { git = "https://gitlab.com/ryan-summers/std-embedded-nal", branch = "feature/0.8" }

And it probably needs to be updated before this PR, I guess. What do you think?

I figured out some fork was used, while upstream already has support for embeddel_nal 0.9, so I just removed git dependency and used crates.io version

Fixed doc tets

Thanks!