Wokwi Embedded Systems & IoT Simulator

Wokwi B.V. is a company registered in Amstelveen, the Netherlands, that runs a browser-based simulator for microcontroller and IoT projects. It lets engineers, students and teams write and test embedded firmware without waiting for physical boards, sensors or lab equipment.

The simulator covers Arduino Uno, Mega and Nano, ESP32 variants, STM32, Raspberry Pi Pico and MicroPython projects, with virtual Wi-Fi, a private IoT gateway and digital circuit simulation developed with Tiny Tapeout. The same engine is available inside VS Code and JetBrains IDEs, and Wokwi for CI runs firmware tests on simulated hardware in GitHub Actions or GitLab CI, scripting button presses and sensor states and checking serial output. The Wokwi CLI has experimental Model Context Protocol support so AI agents can run tests and simulate hardware. A Wokwi Classroom licence serves universities and technical institutions.

• Board simulation: Arduino, ESP32, STM32, Raspberry Pi Pico and MicroPython projects in the browser.
• IDE integration: Wokwi for VS Code and JetBrains IDEs, with an offline VS Code plug-in on Pro.
• Wokwi for CI: automated firmware tests on simulated hardware in GitHub Actions and GitLab CI.
• Scenario scripting: tests press buttons, change sensor states and check serial output.
• Virtual networking: virtual Wi-Fi, private IoT gateway and custom Wi-Fi access points.
• AI agent access: experimental MCP support in the Wokwi CLI for AI-driven testing.

A Vietnamese IoT product company can run ESP32 firmware regression tests in CI on every commit before boards arrive from the factory. Universities and vocational schools can run embedded systems courses for large classes under a Classroom licence. Training centres for semiconductor and embedded engineers can give students remote labs.

Firmware teams can start development and run regression tests before hardware is available, and catch failures on every commit through CI. Schools can teach embedded systems without buying and maintaining board kits for every student. Commercial users pay a per-seat Pro plan of 20 EUR per month on annual billing, and the Classroom licence costs 30 EUR per student per semester.

Embedded and IoT teams are adopting simulation and hardware-in-the-loop style testing to shorten development cycles and apply continuous integration to firmware. In Vietnam, ESP32 and STM32 are widely used in IoT products and engineering education, and the push to train semiconductor and embedded engineers raises demand for scalable lab tools.

Wokwi B.V. is registered in the Netherlands (KvK 42030899) at Amstelveen, with Dutch law governing its terms. The site carries a 2019-2026 copyright and shows university logos including NUS, Harvard University, Tufts University, University of Hamburg and TDTU. It collaborates with Tiny Tapeout on digital chip design simulation.