Projects

What I'm working on and how far along it is.

• A sketch to try

  Today

  • Squats
  • Push-ups
  • Rows

  Tap the exercises.

  Workout done!

  SimpleGym

  Status: Closed alpha

  Fitness app for Android with an API, an admin panel, offline sync and several languages. A web version is in progress.

  • Kotlin
  • TypeScript
  • JavaScript
  • CSS

  As of September 2026

  • simplegym.felixthedev.com
• Hold the card to the reader

  Door closedDoor open

  1. Card detected
  2. Lock sends a random number
  3. Card answers encrypted
  4. Answer matches, door open

  Simplified simulation in the browser

  NFC door lock

  Status: In progress

  Firmware for a door lock that checks MIFARE DESFire EV3 cards with AES-128 challenge-response.

  • ESP32-S3
  • PN532
  • MIFARE DESFire EV3
  • AES-128

  As of September 2026

• MiniCasino

  Status: Released

  A small casino game with card accounts, a browser admin panel and a 3D model that runs on the real game logic.

  • C++
  • Arduino
  • Python
  • three.js

  As of September 2026

  • Code on GitHub
  • 3D model in the browser
• GitHub profile

  Status: Released

  My GitHub profile page, with graphics that a script of my own redraws every day, without third-party services or dependencies.

  • Node.js
  • SVG
  • GitHub Actions

  As of September 2026

  • github.com/felixthedevgit

Code from my projects: GitHub (felixthedevgit)