This is an online electronics simulator that you can use to simulate Arduino, ESP32, STM32, and many other popular boards, components, and sensors online.
Key Features
- WiFi simulation – Connect your simulated project to the internet. You can use MQTT, HTTP, NTP, and many other network protocols.
- Virtual Logic Analyzer – Capture digital signals (e.g., UART, I2C, SPI) in your simulation and analyze them on your computer.
- Advanced debugging with GDB – Powerful Arduino and Raspberry Pi Pico debugger for advanced users.
- SD card simulation – Store and retrieve files and directories from your code. Paid users can also upload binary files (e.g., images).
- Chips API – Create your own custom chips and components and share them with the community.
- Visual Studio Code integration – Simulate your embedded projects directly from VS Code.

Supported Hardware
Simulates a wide range of hardware components, including microcontrollers, sensors, displays, and more. Supports ARM, AVR, RISC-V, and Xtensa architectures.
Wokwi is free for personal use.