Yevgen`s official homepage
Yevgen Somochkin
"ΞΣΣΘ"
CTO ESSO.DEV
Building the Future of AI, Automation & Web3 | Full-stack & DevOps Architect | Scalable, Data-driven Web & Mobile Apps
Hamburg, Germany
Buttons you press, and that press back
Desk hardware that works in both directions. Pressing runs something on your computer; an event from the internet — a failed build, a page going down, someone mentioning you — lights the device up.
Two of them exist: XENPAD One, a single mechanical switch with a full-colour indicator on an RP2040, and XENPAD Omni, a round touchscreen on an ESP32-S3 with a rotary encoder and an RGB ring.
The whole desk side is mine: firmware for both chips, a signed and notarized macOS app, and the relay that carries events from the internet to a device sitting behind someone's router.
The firmware for both devices is open source under GPLv3, but the USB protocol is MIT in both — so anything can talk to the devices without inheriting copyleft.
That split is deliberate. The shortcuts live in the device's own flash, so a button keeps working on a machine that has never seen my software. And if I stop, someone else can build the firmware and write a replacement app.
A single mechanical switch with a full-colour indicator, on an RP2040. Three gestures, each mapped independently, and a resting colour that tells you the state of whatever it is watching.
A round touchscreen on an ESP32-S3 with a rotary encoder and an RGB ring. Tiles, layers, and alerts that take over the whole glass with the actual message rather than a coloured dot. Press it and it opens the exact thing that raised the alert.
Firmware for both chips, a signed and notarized macOS app, and the relay that carries events from the internet to a device sitting behind someone's router.
Both firmwares are GPLv3, but the USB protocol is MIT — anything can talk to the devices without inheriting copyleft. The shortcuts live in the device's own flash, so a button keeps working on a machine that has never seen my software, and if I stop, someone else can build the firmware and write a replacement app.
