Changelog

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

2.0.1 - 2026-04-22

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

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 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

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

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 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)