Turn your audio ideas into working prototypes in minutes. The Espressif ESP32-S31-Korvo-1 V1.1 is a compact audio development board that lets you build smart speakers, voice-controlled gadgets, and streaming devices without hunting for separate modules. Many hobbyists and engineers waste time wiring microphones, amplifiers and Wi-Fi chips together, only to hit compatibility problems. This board bundles everything you need, so you can focus on the sound and the user experience instead of hardware headaches.
Espressif ESP32-S31-Korvo-1 V1.1, Audio Development board
Developers often struggle to find a single platform that supports high-quality audio input, powerful playback, and wireless connectivity. Without such a platform, projects become bulky, costly, and hard to scale. The Espressif ESP32-S31-Korvo-1 V1.1 solves that by integrating a dual-mic array, stereo codec, class-D amplifiers, and dual USB-C ports on a single board. It also offers built-in Wi-Fi and Bluetooth LE, letting you add voice interaction, streaming, or remote control with a few lines of code. The result is a clean, reliable prototype that can move straight to production.
Key Features
- ESP32-S31 WROOM-3 SoC with dual-core processor.
- ES8389 low-power stereo audio codec.
- Dual NS4150B 3 W Class-D amplifiers.
- 3.5 mm headphone jack and two 4 speaker outputs.
- I2S and I2C audio interfaces.
- Dual USB-C ports for power and programming.
- MicroSD card slot for external storage.
- Support for 4.3-inch LCD expansion via FPC connector.
- DVP camera interface for video input.
- Onboard 5 V to 3.3 V LDO and buck converter for stable power.
Specifications
| General |
|
| Product |
Espressif ESP32-S31-Korvo-1 V1.1 |
| Product Type |
Multimedia Audio Development Board |
| Module |
ESP32-S31-WROOM-3 |
| Applications |
Smart audio, voice interaction, speech recognition, HMI, audio/video streaming |
| Processor |
|
| SoC |
ESP32-S31 |
| Wireless |
2.4 GHz Wi-Fi, Bluetooth® Low Energy |
| Audio |
|
| Audio Codec |
ES8389 Low-Power Stereo Audio Codec |
| Microphones |
Dual onboard analog microphone array |
| Speaker Output |
2 × Speaker output ports (supports 4 Ω, 3 W speakers) |
| Audio Amplifier |
2 × NS4150B 3 W Class-D amplifiers |
| Headphone Output |
3.5 mm audio jack |
| Audio Interface |
I2S, I2C |
| Features |
Speech recognition, Near-field and far-field voice wake-up |
| Display & Camera |
|
| LCD Support |
Supports 4.3-inch LCD expansion board |
| Camera |
Supports DVP camera |
| Storage |
|
| Memory Card Slot |
microSD card slot |
| USB & Interfaces |
|
| USB Ports |
2 × USB Type-C (Power and Programming) |
| Expansion |
FPC connector for LCD expansion board |
| User Interface |
|
| Buttons |
Boot, Reset, PLAY, SET, VOL+, VOL- |
| LEDs |
5V Power LED |
| Power |
|
| Power Input |
USB Type-C |
| Power Management |
Onboard 5V to 3.3V LDO, Buck DC-DC converter |
| Software |
|
| Development Framework |
ESP-IDF |
| Supported OS |
Windows, Linux, macOS (development host) |
