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velxio/CHANGELOG.md

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Changelog

All notable changes to Velxio will be documented in this file. The format is based on Keep a Changelog.

3.0.0 - 2026-06-11

Added

  • Digital Gate Engine: Event-driven logic gate evaluation for board‑less digital circuits (AND, OR, NOT, XOR, NAND, NOR, XNOR, multi‑input gates). Supports sequential logic: D, T, JK flip‑flops, 4‑bit ripple counter, and mixed digital/analog boundary handoff.
  • Chip‑to‑Chip Bus: Custom chips can now share address/data buses via a 4‑valued logic kernel with drive‑strength tri‑state nets. Ships a complete Galaksija Z80 home computer example (keyboard, display, ROM, RAM) that boots in the browser.
  • Retro CPU Custom Chips: Programmable Z80 and Intel 8080 CPU emulator chips with external ROM loaded from project files (assembly or C via SDCC). Includes i8080 Kill‑the‑Bit demo and Z80 Larson scanner examples.
  • MicroSD Card Storage: SD‑over‑SPI card emulation for AVR, RP2040, and ESP32 boards. FAT16 image built from workspace files with an upload panel for extra files (gated by pro overlay).
  • Signal Router: First‑class GPIO Matrix routing for ESP32 – per‑signal routing via SignalRouter class, replacing the previous ad‑hoc ledc_gpio_map. Multi‑servo control now works correctly.
  • Library Manager: Single unified tab with state‑aware row actions (Add to project, In project toggle, Uninstall/Remove). Per‑board library manifests (velxio.json) autocomplete and persistence.
  • Oscilloscope Trigger Modes: Auto, Normal, and Single‑shot trigger with configurable source, edge, and position. ARMED/TRIGGERED/CAPTURED status badges.
  • Undo/Redo: Command‑pattern undo/redo for canvas mutations (add/remove/move/rotate components, add/remove wires). Keyboard shortcuts (Ctrl+Z, Ctrl+Y) and toolbar buttons.
  • i18n – Multilingual Support: Full internationalisation for the editor, landing page, examples gallery, and auth pages. 9 locales (en, es, pt‑br, it, fr, zh‑cn, de, ja, ru) with react‑i18next foundation.
  • ESP32‑CAM Emulation: End‑to‑end emulation of the AI‑Thinker ESP32‑CAM with real webcam frame bridge. esp_camera_fb_get() returns JPEG frames from user’s camera. Gallery example with ILI9341 live preview.
  • ePaper Display Support: SSD168x (mono/tri‑colour) and UC8159c (ACeP 7‑colour) decoder with SPI slave and canvas rendering. Works on AVR, RP2040, and ESP32.
  • STM32 Board Emulation: Blue Pill, Black Pill, F4 Discovery, Olimex H405, Netduino 2/+2 – all via QEMU arm backend

2.0.1 - 2026-04-22

Added

  • Enhanced electrical simulation with ngspice-WASM engine for accurate analog circuit analysis
  • Expanded component catalog with 44 SPICE-compatible parts including logic gates, transistors, op-amps, regulators, and electromechanical components
  • Added 40 new circuit examples demonstrating analog, digital, and electromechanical concepts
  • Introduced custom web components for electronic elements (relays, resistors, capacitors, inductors, transistors)
  • Implemented ESP32 ADC waveform simulation with periodic 12-bit waveform look-up tables and interpolation
  • Added voltmeter and ammeter instrument components for real-time circuit measurements
  • Created comprehensive end-to-end tests for electrical simulation including capacitor charging, rectifier behavior, and waveform analysis
  • Added GitHub Actions workflow for circuit simulation testing on every push and PR

Changed

  • Renamed all components to use 'velxio-' prefix for consistency
  • Enabled electrical simulation by default (always-on SPICE mode) instead of requiring manual activation
  • Enhanced LED brightness simulation to reflect actual current flow from SPICE calculations
  • Updated backend to handle unhandled asyncio exceptions and prevent process crashes
  • Improved component metadata generation to prevent CI drift and enforce up-to-date metadata
  • Refactored property synchronization in simulation parts to use event-based system
  • Expanded ADC pin mapping to support all 18 board types for full microcontroller integration

Fixed

  • Fixed sitemap generation to include all circuit examples for better SEO visibility
  • Resolved floating input node issues in RC low-pass filter circuits that caused SPICE singular matrix errors
  • Updated proxy configuration to use 127.0.0.1 for improved compatibility
  • Fixed metadata regeneration to properly include custom components in the component picker
  • Improved backend entrypoint script to ensure clean container restarts when processes die

2.0.1 - 2026-04-17

Added

  • Added ATtiny85 support with examples and simulation tests
  • Added BMP280 sensor component with circuit preview and SVG representation
  • Added example detail pages with improved SEO and sitemap generation
  • Added MicroPython support for RP2040 (Pico), ESP32, ESP32-S3, and ESP32-C3 boards
  • Added ability to upload precompiled firmware files (.hex, .bin, .elf) directly into the emulator
  • Added ability to remove boards from workspace with confirmation dialog
  • Added I2C sensor support with slave emulation for MPU6050, BMP280, DS1307, and DS3231 sensors
  • Added ESP32 WiFi/BLE emulation with ESP-IDF compilation pipeline
  • Added VS Code extension skeleton for local simulation
  • Added comprehensive documentation for ESP32 GPIO sensor simulation, Docker infrastructure, and MicroPython implementation
  • Added auto-compile feature that triggers compilation when pressing Play if code changed or no firmware loaded
  • Added share functionality for projects and examples with visibility toggle
  • Added component metadata overrides and enhanced property controls
  • Added new CI/CD workflows for backend unit tests, end-to-end tests, and automated Discord release notifications
  • Added Docker multi-architecture support (amd64 + arm64) and pre-built ESP-IDF toolchain image

Changed

  • Enhanced auto-compile to use board's file group for WiFi detection instead of legacy global files
  • Updated CircuitPreview component and implemented ShareModal using createPortal
  • Enhanced Arduino pin tracing in DynamicComponent and updated LittleFS WASM initialization
  • Enhanced ESP-IDF compiler library resolution logic and added support for dynamic library detection
  • Enhanced wire connection handling and GND checks for components
  • Enhanced logging for library loading and WiFi progress
  • Updated Docker build processes with optimized build contexts and multi-architecture support
  • Changed WiFi SSID normalization to match QEMU access points for reliable ESP32 WiFi connection
  • Refactored I2C slave tests for ESP32 with improved event handling and ACK/NACK responses

Fixed

  • Fixed container restart issue by monitoring both backend and nginx processes
  • Fixed project saving to use active board files/kind and improved error messages
  • Fixed ESP32 boot stability with deterministic instruction counting
  • Fixed ESP32 Run button to auto-compile and recover firmware after page refresh
  • Fixed LED ground check to require cathode wired to GND (or LOW GPIO) to light up
  • Fixed MPU6050Slave I2C handling with improved WHO_AM_I read tracking
  • Fixed ESP32 WiFi SSID/channel alignment with QEMU access_points array
  • Fixed RISC-V toolchain paths for ESP32-C3 compilation
  • Fixed ESP-IDF Python requirements installation in Docker
  • Fixed SaveProjectModal to prevent saving to /api/projects/none when project ID is invalid
  • Fixed ESP32 compilation by adding missing dependencies (cmake, ninja-build, git, packaging, libusb)