As of 2025-2026, the open-source community has made significant progress. Unofficial builds of SimulIDE integrate the backend or a custom ARM Cortex-M emulator.
is an open-source, real-time electronic circuit simulator used by hobbyists and students for rapid prototyping of analog and digital circuits. While it is widely known for AVR and Arduino support, its simulide stm32 full
SimulIDE offers several tools to inspect the "internals" of your running STM32: As of 2025-2026, the open-source community has made
Don't forget to match the frequency! Right-click the MCU, go to Properties , and set the Frequency to match what you configured in your code (e.g., 8MHz or 72MHz for a BluePill). 🛠️ Key Tips for Success As of 2025-2026