Netduino 2 Simulator
STM32F205 on an Arduino-shaped board, run as plain STM32
Simulate the Netduino 2 (STM32F205, Cortex-M3) in your browser: Arduino C++ through the STM32duino core on QEMU, with GPIO and serial wired to a live circuit.
Three free 15-minute trial sessions · Then Maker and Pro plans · Runs in your browser
Netduino 2 at a glance
The Netduino 2 is an STM32F205 (Cortex-M3 at 120 MHz) in the same Arduino-shaped outline as the Netduino Plus 2, one step down in core and memory. As with its sibling, it runs here as a plain STM32 under the STM32duino core, writing Arduino C++ rather than the .NET Micro Framework the board shipped with.
- Processor
- STM32F205RF, Arm Cortex-M3 at 120 MHz
- Memory
- 128 KB SRAM · 768 KB flash
- Emulation
- QEMU (libqemu-arm) on Velxio's servers
- Languages
- Arduino C++ (STM32duino core)
- Made by
- Netduino
- Plan
- Trial, then Maker or Pro
What you can do with the Netduino 2 simulator
The board on the canvas is the real thing as far as your code is concerned: the same pins, the same buses, the same peripherals, wired to the same 100+ sensors, displays and actuators every other Velxio board talks to.
Arduino C++ sketches
Write a sketch in the Monaco editor with library completion, compile it against the board's own Arduino core and run the real firmware binary. The Serial Monitor is the USB port.
GPIO, PWM and ADC
Drive LEDs, relays and servos, read buttons and potentiometers, dim with PWM. Every pin follows the board's real pin map, so what works here works on the hardware.
Serial Monitor
USB CDC serial reaches the Serial Monitor at the sketch's baud rate, with input, timestamps and a plotter.
Multi-board canvas
Mix this board with an Arduino, an ESP32 or a Pico on the same canvas and let them talk over serial or I2C, each running its own firmware.
Try it before you subscribe
A free account gets three 15-minute trial sessions on this board family; every run inside a session is free. Unlimited runs are part of the Maker and Pro plans and of Velxio Desktop.
Netduino 2 examples
Ready-to-run projects for this board from the gallery. Open one, read the sketch, press Run.
Related simulators
Frequently asked questions
- What is the difference between the Netduino 2 and the Netduino Plus 2?
- The Plus 2 has an STM32F405 (Cortex-M4 with FPU, 1 MB flash) and Ethernet; the Netduino 2 has an STM32F205 (Cortex-M3, 768 KB flash) and no network. In the simulator both run the same Arduino C++.
- What does the STM32 simulator cost?
- The editor is free, and any account can place the board and wire a circuit. Running it boots a QEMU guest on Velxio's servers: a free account gets three 15-minute trial sessions on the STM32 family, and unlimited runs are part of the Maker and Pro plans.
- Is the Netduino 2 simulator free?
- Partly. You can build and save a Netduino 2 circuit with any account, and a free account gets three 15-minute trial sessions to run it; every run inside a session is free. Unlimited runs boot a Linux guest on our servers, so they are part of the Maker and Pro plans, or of Velxio Desktop with a paid licence.
- Which languages can I use on the Netduino 2?
- Arduino C++ (STM32duino core). The language is switched from the toolbar; the circuit on the canvas stays the same.
Ready to simulate the Netduino 2?
Open the editor, place the Netduino 2 from the picker, wire what you need and press Run.
Launch the Netduino 2 simulator →