How does the AI Arduino project generator work?

Click the AI button or press Ctrl+Shift+A and describe your project in plain English, for example 'traffic light with 3 LEDs cycling red-yellow-green' or 'servo controlled by potentiometer with angle on LCD'. The AI generates both the complete Arduino sketch and a Wokwi-compatible circuit diagram with components and wiring, then loads everything into the editor and canvas ready to compile and run.

Can AI fix my Arduino compile errors?

Yes. When compilation fails, an AI Fix button appears in the toolbar. Click it and the AI reads the error messages and your code, then replaces it with a corrected version. It understands Arduino-specific issues like missing libraries, incorrect pin modes, syntax errors, and type mismatches.

What boards and components can I simulate?

6 board families and 21 virtual components. Boards: Arduino Uno, Arduino Nano, Raspberry Pi Pico, ESP32, ESP32-C3, ESP32-S3, Raspberry Pi 3B. Components: LEDs, push buttons, potentiometers, servo motors, buzzers, 7-segment displays, LCD 16x2, OLED SSD1306, NeoPixel, DHT22, HC-SR04 ultrasonic, rotary encoder, membrane keypad, relay, photoresistor, and NTC temperature sensor. The AI can generate circuits using any of these components.

Yes, completely free with no signup required. AI code generation, AI error fixing, AI explanations, compilation, simulation, 33 example sketches, multi-file projects, and Wokwi-compatible diagram import/export are all available immediately with no account needed.

AI-Powered Arduino Simulator Online — Gener...

About This Arduino Simulator

This free online Arduino simulator lets you write, compile, and run Arduino C++ code directly in your browser. No software installation required. Supports 6 board families: Arduino Uno, Arduino Nano, Raspberry Pi Pico, ESP32, ESP32-C3, ESP32-S3, and Raspberry Pi 3B.

How It Works

Arduino Uno/Nano: Your sketch compiles to AVR machine code using the real arduino-cli toolchain. The compiled hex runs on a cycle-accurate ATmega328p emulator (avr8js) at 16MHz in your browser. All 21 virtual components (LEDs, buttons, potentiometers, servos, LCD, OLED, sensors) are interactive.

Raspberry Pi Pico: Compiled UF2 firmware runs on an RP2040 emulator (rp2040js) at 125MHz in your browser. Supports GPIO, ADC, PWM, and UART.

ESP32 / ESP32-C3 / ESP32-S3: Sketches compile with DIO flash mode and run on Espressif's QEMU on our server. Serial output and GPIO pin changes stream to your browser in real-time via SSE. A compile-time GPIO bridge visualizes digitalWrite() calls as LED state changes.

Supported Components

21 virtual components with live SVG rendering: LED (red/green/yellow/RGB), push button, potentiometer, slide potentiometer, slide switch, servo motor, buzzer (Web Audio), relay, NeoPixel, 7-segment display, rotary encoder, membrane keypad, LCD 16x2, OLED SSD1306, DHT22 temperature sensor, HC-SR04 ultrasonic sensor, NTC temperature sensor, and photoresistor (LDR). Components are powered by wokwi-elements (MIT licensed).

Features

Monaco code editor with C++ syntax highlighting and compile error markers
33 example sketches across 9 categories (Basics, Input, Analog, Serial, Servo, Buzzer, RGB, Projects, ESP32)
Multi-file project support (header files, libraries)
Wokwi-compatible diagram.json import/export with live two-way editor sync
Serial monitor with bidirectional I/O
xterm.js Linux terminal for Raspberry Pi
Dark and light theme
Mobile responsive with tab switcher
URL sharing for sketches
Keyboard shortcuts: Ctrl+Enter (Run), Ctrl+B (Compile), Ctrl+S (Save)

Frequently Asked Questions

Is this simulator free?

Yes, completely free with no signup required. Arduino and Pico simulations run in your browser. ESP32 simulations use shared server resources with automatic 10-minute timeout.

Can I use my own Arduino libraries?

The compile server includes popular libraries (Servo, Wire, SPI, Adafruit NeoPixel, DHT, LiquidCrystal, U8g2, FastLED, and more). You can also use multi-file projects with custom header files.

How is this different from Wokwi?

This simulator supports ESP32 via real QEMU emulation (not just browser-side), Raspberry Pi Pico, and Raspberry Pi 3B. It uses the same wokwi-elements for component visuals and supports Wokwi's diagram.json format for circuit interchange.

Why does my ESP32 sketch crash after 14 seconds?

ESP32-C3 QEMU has a watchdog timer limitation. ESP32 (Xtensa) runs indefinitely. The crash dump is filtered from the serial monitor.

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About This Arduino Simulator

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