A KNOMI display, OTA updates and my first Rust project
I put a small display on the printer, contributed wifi updates to its firmware, and later wrote a flashing tool in Rust.
I put a Knomi display on the printer. While I was at it, I contributed OTA updates over wifi to the manufacturer, because without them it was just silly.

October: a flashing tool in Rust
Let me brag: yesterday I made my first micro-project in Rust.
In essence I wrote a tool for updating the KNOMI firmware to my fork. The good parts: it contains everything in itself, including the firmware, and it is available for all 3 platforms (I tested it on only one, naturally).
On the whole I liked it. It feels like the language has everything you need for writing system software. And it builds into some minimal binary. I especially enjoyed how simple it was to put the firmware itself inside the resulting binary.
As a result, the list of technologies used in the fork is now even more entertaining :)
