Free ESP32 Simulator Online — Real Firmware, Real Compilation
FREE BROWSER SIMULATOR · NO ACCOUNT
Free ESP32 Simulator Online — Real Firmware, Real Compilation
The ESP32 simulator that actually compiles: your sketch goes through the real esp32:esp32 Arduino core with a real arduino-cli backend, then runs against a simulated Xtensa LX6 with WiFi, BLE, ADC and PWM. Scan WiFi, serve HTTP, read DHT22 and BMP280, drive OLEDs and servos — the same code you flash to hardware.
What you get
- Real compilation — the actual esp32:esp32 core, not a JavaScript interpreter
- WiFi modeled — scan, connect and HTTP server examples with real network behavior
- BLE advertising — the ESP32's Bluetooth stack is part of the simulation
- Onboard and external LEDs — GPIO2 built-in, external wiring on the breadboard
- 33 ESP32/C3/CAM examples — sensors, displays, WiFi, steppers and DOOM
Supported targets
| ESP32 DevKit | esp32:esp32:esp32 |
|---|---|
| ESP32-CAM | esp32:esp32:esp32cam |
| Xtensa LX6 | dual-core 240 MHz |
| WiFi | 2.4 GHz b/g/n |
| ADC | 12-bit, 18 channels |
Try these examples
ESP32 Blink LEDRead the write-up →
ESP32 DHT22Read the write-up →
ESP32 WiFi ScanRead the write-up →
ESP32 HTTP ServerRead the write-up →
ESP32 OLEDRead the write-up →
ESP32 ServoRead the write-up →
ESP32 DHT22Read the write-up →
ESP32 WiFi ScanRead the write-up →
ESP32 HTTP ServerRead the write-up →
ESP32 OLEDRead the write-up →
ESP32 ServoRead the write-up →
FAQ
Does WiFi actually work in the simulator?
The WiFi stack is modeled: scan finds simulated networks, connect joins them, and the HTTP server answers real requests from the browser. The radio itself is emulated — the point is the firmware behavior, which matches hardware.
Can I flash the compiled sketch to a real ESP32?
The compilation output is the real thing — the same core, compiler and settings as the Arduino IDE. The simulator runs it in simulation; for hardware flashing, the same source compiles identically in the IDE.