Yeah the SPI interfacing ones are around 4 euros, though if you have a MAC the RMII ones are in the 2-3 euro range. :)

If you want to try something fun, I can recommend power over datalines (PoDL) using single pair Ethernet (SPE). It's easy to integrate as well if you use the 10MBit standard, there are SPI based transceivers. So you can either get multi drop (T1S) or long cables (T1L).

When adding pads for external use like you have done, I really like protection parts which have built in current limiting and ESD protection. Quite versatile, easy to solder :D www.onsemi.com/pdf/datashee...

Isn't there one from wch? www.wch-ic.com/products/CH3...

Is it's consumer grade IMU that is not clocked via an clock reference input then you can expect +/- 3-5% over temperature in my experience. If you need accurate sampling times, eg when doing inertial odometry, always timestamp on the MCU :)

It's just a bit unfortunate that ASCON uses 64 bit words for its operations which optimize badly on 32 bit ARM, so it does not beat ChaCha20Poly1305 on Cortex M :( still a very nice cipher github.com/korken89/asc...

Then there is EASY which adds deadline based scheduling to the core of RTIC, which uses SYMEX internally, and there you can instead add deadlines for tasks. It will analyze and give errors if and deadline cannot be met. The tools are still under development though, but are quite capable already.

This is the core feature we've prepared RTIC for. Hit up Per Lindgren in the chat, they are working on 2 tools - SYMEX which can show you the WCET path and estimate it, or give you inputs to run something on target to measure the time.

I run KiCAD v9 daily in Wayland under Niri WM with `xwayland-sattelite` and don't really have issues, so it does not look like it's a big issue in practice. I've tried the same with Hyprland, and Sway, which also works well.

Thank you! Then I wasn't crazy at least :D