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pnfd/README.md

Hi 👋, I'm David Penfold

Freelance Embedded Software Expert | Creator of the STM32 WireGuard Stack

Website LinkedIn

👨‍💻 About Me

I turn complex hardware requirements into production-ready, secure firmware. With over 16 years of experience in automotive and home automation, I specialize in bare-metal programming, RTOS architectures, and embedded security.

Currently, I am heavily focused on helping hardware manufacturers prepare for the Cyber Resilience Act (CRA) by implementing secure connectivity solutions directly on microcontrollers.

  • 🔭 Currently working on: Next-Gen Secure Diagnostics (UDS over VPN) & Embedded Security Audits.
  • 🚀 My Flagship Product: A native, hardware-accelerated WireGuard® VPN Stack for STM32H5 (No Linux-Gateway required!).
  • 💬 Ask me about: C/C++, Azure RTOS (ThreadX / NetX Duo), TrustZone, Secure Boot, and Hardware Cryptography.
  • 📫 How to reach me: contact@pnfd.de

🛠️ Tech Stack & Tools

Languages & Core: C C++ Python Assembly

Hardware & RTOS: STM32 Azure RTOS FreeRTOS ARM

Protocols & Security: WireGuard CAN Bus Cryptography

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  1. STM32H5-WireGuard-AzureRTOS STM32H5-WireGuard-AzureRTOS Public

    WireGuard on NetX Duo for embedded devices

    C