# ESP32-S3 Korvo 2 Audio Dev Board

> Espressif audio and multimedia development board with ESP32-S3, dual-microphone array for far-field wake-word detection, camera support, LCD interface, microSD, and Wi-Fi + BLE.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$49.95
- **Product Readiness:** developer
- **CPU:** ESP32-S3
- **CPU Architecture:** Xtensa LX7
- **CPU Cores:** 2
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **Power:** 5V via Micro-USB
- **Operating Voltage:** 3.3V
- **Antenna:** Built-in PCB antenna
- **SD Card:** microSD

## Connectivity

- **Wifi:** 802.11b/g/n
- **Bluetooth:** BLE 5.0

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Compatible Firmware

ESP-ADF, esp-idf

## Use Cases

- voice-assistant
- audio
- iot
- smart-home
- ai-ml

## Components

- **ESP32-S3** (mcu): Dual-core Xtensa LX7 240 MHz, AI acceleration, Wi-Fi + BT5 LE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=esp32-s3-korvo-2&source=md-export)
- **Dual Microphone Array** (microphone): Two MEMS microphones for near/far-field wake-word detection. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fespressif-docs.readthedocs-hosted.com%2Fprojects%2Fesp-adf%2Fen%2Flatest%2Fdesign-guide%2Fdev-boards%2Fuser-guide-esp32-s3-korvo-2.html&ref=openhardware.directory&product=esp32-s3-korvo-2&source=md-export)

## Protocols

- **I2C**: SDA: GPIO10, SCL: GPIO11
- **SPI**: MOSI: GPIO13, MISO: GPIO9, SCK: GPIO12, CS: GPIO14
- **UART**: TX: GPIO43, RX: GPIO44
- **I2S**: BCLK: GPIO0, WS: GPIO2, DOUT: GPIO3
- **SDIO**: 

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | I2S BCLK | I2S | i2s, digital |
| GPIO2 | I2S WS | I2S | i2s, digital |
| GPIO3 | I2S DOUT | I2S | i2s, digital |
| GPIO5 | D5 | GPIO | digital |
| GPIO6 | D6 | GPIO | digital |
| GPIO7 | D7 | GPIO | digital |
| GPIO8 | D8 | GPIO | digital |
| GPIO9 | SPI MISO | SPI | spi-miso, digital |
| GPIO10 | SDA | I2C | i2c-sda, digital |
| GPIO11 | SCL | I2C | i2c-scl, digital |
| GPIO12 | SPI SCK | SPI | spi-sck, digital |
| GPIO13 | SPI MOSI | SPI | spi-mosi, digital |
| GPIO14 | SPI CS | SPI | spi-cs, digital |
| GPIO43 | TX | UART | uart-tx, digital |
| GPIO44 | RX | UART | uart-rx, digital |

## Available Software

- **[ESP-ADF](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-adf&ref=openhardware.directory&product=esp32-s3-korvo-2&source=md-export)**

## Description

## Overview

The ESP32-S3 Korvo 2 is Espressif's dedicated audio and multimedia development board, designed for building voice assistant, smart speaker, and audio streaming applications. At its core is the ESP32-S3 SoC — dual-core Xtensa LX7 at 240 MHz with AI acceleration and Wi-Fi 4 + Bluetooth 5 LE — paired with a dual-microphone array optimized for near and far-field wake-word detection and voice command recognition.

The board supports 24-pin 8-bit camera modules (OV5640, OV2640) for video capture, an LCD display interface for visual output, and a microSD card slot for audio file storage and logging. JPEG video processing is supported directly in firmware. The ESP-ADF (Audio Development Framework) provides high-level APIs for audio pipelines, equalizers, and streaming codecs, while ESP-SR handles offline speech recognition with multi-language wake-word support.

Connectivity over USB Micro-B enables programming and serial debugging. The Korvo 2 is the development platform for IoT voice interfaces, smart home hubs, and intercom systems, and integrates with ESP RainMaker for cloud connectivity. Hardware is open-source via the Espressif esp-adf repository.

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5829&ref=openhardware.directory&product=esp32-s3-korvo-2&source=md-export) — 49.95

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5829&ref=openhardware.directory&product=esp32-s3-korvo-2&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp-adf&ref=openhardware.directory&product=esp32-s3-korvo-2&source=md-export)
- [learn guide](https://openhardware.directory/r?to=https%3A%2F%2Fespressif-docs.readthedocs-hosted.com%2Fprojects%2Fesp-adf%2Fen%2Flatest%2Fdesign-guide%2Fdev-boards%2Fuser-guide-esp32-s3-korvo-2.html&ref=openhardware.directory&product=esp32-s3-korvo-2&source=md-export)

## Tags

`esp32-s3`, `espressif`, `audio`, `voice-assistant`, `microphone`, `camera`, `esp-adf`, `ai`

## Images

![ESP32-S3 Korvo 2 Audio Dev Board](https://nbg1.your-objectstorage.com/openhardware-directory/entities/esp32-s3-korvo-2/46e85a18778e.jpg)
![ESP32-S3 Korvo 2 Audio Dev Board](https://nbg1.your-objectstorage.com/openhardware-directory/entities/esp32-s3-korvo-2/e559bda887dc.jpg)

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