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Vanderhell/README.md

Hi, I'm Vanderhell 👋

Embedded systems developer focused on industrial IoT, Modbus, MQTT, and building reliable firmware. I write small, focused C/C# libraries that solve real problems — zero dependencies, zero allocations, tested.

🔧 micro-toolkit — Modular C99 libraries for embedded systems

A collection of composable libraries that share a common philosophy: no heap, no dependencies, no code generation — just #include and go.

┌─────────────────────────────────────────────────────────────┐
│  microsh ─── debug shell        microlog ── structured logging
│  microfsm ── state machines     microres ── retry + breaker
│  microconf── flash config       microcbor── CBOR serialization
│  micoring ── ISR-safe ring buf  iotspool ── MQTT persistence
│  microtimer─ software timers    microbus ── event pub/sub
└─────────────────────────────────────────────────────────────┘
Library What it does Tests
microfsm Table-driven finite state machine engine 36
microres Retry with backoff, circuit breaker, rate limiter 41
microconf Schema-driven config with CRC + flash storage 40
microlog Multi-backend structured logging 33
microsh Debug shell with history + tab completion 43
microcbor Minimal CBOR encoder/decoder (RFC 8949) 43
micoring Generic lock-free SPSC ring buffer 33
microtimer Software timer manager — oneshot + periodic, drift-corrected 25
microbus Event pub/sub bus — topic-based, ISR-safe deferred queue 34

→ micro-toolkit — architecture overview, design philosophy, and a complete example project

🔗 embedded-guard — Safety, monitoring & recovery

Libraries that bridge the toolkit together: boot orchestration, health monitoring, watchdogs, panic handling, OTA updates.

Library What it does Tests
microhealth Runtime health monitor — collect metrics, dual thresholds, edge-triggered alerts 32
microwdt Per-task software watchdog — kick-based liveness, OK → LATE → STARVED escalation 33
microboot Boot & recovery manager — crash loop detection, proven boot pattern, boot reason tracking 32
microassert Unified panic system — hook chain (log → dump → reset), four severities, re-entrancy guard 33
microota OTA firmware update — chunked download, CRC verify, version check, commit/rollback 27
microflash Unified flash abstraction — partitions, NOR/EEPROM/FRAM/RAM, erase-write, wear stats 33

🛡️ Bare-metal safety & diagnostics

Small utilities for writing safer, more debuggable embedded C code.

Project Description
panicdump Crash dump library for Cortex-M3/M4 — capture on fault, survive reboot, decode offline
MCU-Malloc-Tracker Deterministic heap diagnostics for bare-metal MCUs — malloc/free tracking, CRC snapshots
nvlog Power-loss safe append log for FRAM/EEPROM/NOR flash — no heap, no filesystem, 186 tests
defer Automatic resource cleanup for C via DEFER() macro — single header, GCC/Clang/ARM
cguard Scope guards and result types for C — auto cleanup (free, fclose, unlock), header-only
safemath Overflow-checked add, mul, align and buffer sizing — single header, C99
microcrypt SHA-256, HMAC-SHA256, AES-128 ECB/CBC — NIST/RFC test vectors, zero dependencies
microtest Single-header test framework — suites, fixtures, filtering, color output, 16 assertion macros

🏭 Industrial IoT & protocols

Desktop tools and firmware for real-world industrial communication.

Project Description
IOBusMonitor Multi-protocol desktop tool for Modbus TCP/RTU and Siemens S7 PLCs — live dashboard, history charts, SQLite archive
RTULogSuite Complete Modbus RTU logging toolchain — ESP32 firmware + Windows visualization app
iotspool Persistent store-and-forward MQTT queue — survives power loss, C99, zero dependencies

🖥️ Desktop & .NET

Project Description
MultiGpuHelper C# library for scheduling compute workloads across multiple GPUs — device discovery, VRAM budgeting, policy-based selection
CrudFramework Lightweight CRUD framework for .NET (EF Core + SQLite/SQL Server) — validation, filtering, paging, WPF-ready bindings

⚡ Hardware projects

Project Description
securebox-hw Secure hardware password manager on ESP32-S3 with external encrypted storage
Pragotron-Controller Minute-impulse controller for a Pragotron stepper clock — ESP32, DS1307 RTC, H-bridge

Pinned Loading

  1. IOBusMonitor IOBusMonitor Public

    Multi-protocol desktop tool for reading, archiving and visualising data from Modbus (TCP / RTU) and Siemens S7 PLCs.

    C# 2 1

  2. RTULogSuite RTULogSuite Public

    Complete toolchain for logging and visualizing Modbus RTU data. Includes firmware for ESP32 and a Windows desktop visualization app.

    C++ 2 1

  3. MultiGpuHelper MultiGpuHelper Public

    High-level C# library for scheduling compute workloads across multiple GPUs. Provides device discovery, VRAM budgeting, concurrency control and policy-based GPU selection for AI inference, renderin…

    C#

  4. iotspool iotspool Public

    Persistent store-and-forward queue for MQTT messages. Survives power loss and reboots. Supports Linux, ESP32, and STM32. Written in C99 with zero dependencies.

    C 1

  5. MCU-Malloc-Tracker MCU-Malloc-Tracker Public

    Deterministic heap diagnostics for bare-metal MCUs: malloc/free tracking, binary snapshots, CRC validation, and offline analysis.

    C

  6. securebox-hw securebox-hw Public

    Secure hardware password manager based on ESP32-S3 with external encrypted storage.

    C++