乐鑫esp32-wifi ESP32-Korvo V1.1用户指南
乐鑫esp32-wifi ESP32-Korvo V1.1用户指南
This user guide provides information on ESP32-Korvo V1.1.
本指南介绍了乐鑫esp32-wifi开发板 ESP32-Korvo V1.1。
ESP32-Korvo V1.1 is a dual-core ESP32-based audio development board with microphone arrays. Together with Espressif's speech recognition SDK ESP-Skainet, ESP32-Korvo V1.1 is suitable for developing far-field speech recognition applications with low power consumption, such as smart displays, smart plugs, smart switches, etc.
ESP32-Korvo V1.1 是一个基于双核 ESP32、搭载麦克风阵列的音频开发板，配合乐鑫语音识别 SDK ESP-Skainet，适用于远场低功耗语音识别应用，例如智能语音面板、语音插座、智能语音开关等。
The document consists of the following major sections:
Getting started: Provides an overview of ESP32-Korvo V1.1 and hardware/software setup instructions to get started.
Hardware reference: Provides more detailed information about the ESP32-Korvo V1.1's hardware.
Related Documents: Gives links to related documentaiton.
本指南包括如下内容：
入门指南: 简要介绍了 ESP32-Korvo V1.1 和硬件、软件设置指南。
硬件参考: 详细介绍了 ESP32-Korvo V1.1 的硬件。
相关文档: 列出了相关文档的链接。
1. Getting Started
This section describes how to get started with ESP32-Korvo V1.1. It begins with a few introductory sections about ESP32-Korvo V1.1, then Section Start Application Development provides instructions on how to do the initial hardware setup and then how to flash firmware into ESP32-Korvo V1.1.
1. 入门指南
本节介绍了如何快速上手乐鑫esp32-wifi ESP32-Korvo V1.1。开头部分介绍了 ESP32-Korvo V1.1，开始开发应用 小节介绍了怎样在 ESP32-Korvo V1.1 上安装模组、设置和烧录固件。
1.1 Overview
ESP32-Korvo V1.1 consists of two boards connected by an FPC cable: one mainboard containing an ESP32-WROVER-E module, a USB power port, a micro SD card slot, an earphone connector and a speaker connector, and one subboard containing microphone arrays, function buttons and RGB LEDs.
Unlike other Espressif's audio development boards, ESP32-Korvo V1.1 achieves far-field offline speech recoginition with a single ESP32 chip. The board can be equipped with either two or three microphone arrays. Combined with beamforming, AEC and other speech enhancement algorithms, it applies to various speech-recognition scenarios.
1.1 概述
乐鑫esp32-wifi ESP32-Korvo V1.1 由两块开发板组成，集成多个外设：主板包含 ESP32-WROVER-E 模组、USB 电源接口、micro SD 卡槽、耳机连接器和扬声器连接器，子板包含麦克风阵列、功能键和 RGB LED 灯，两板由 FPC 排线相连。
不同于乐鑫其他的音频开发板，ESP32-Korvo V1.1 用单颗 ESP32 芯片实现远场本地语音识别，支持双麦和三麦阵列，配合波束成形 (beamforming)、AEC 等语音增强算法，满足多种场景下的语音识别需求。
1.2 内含组件和包装
1.2.1 零售订单
1.2.1 Retail orders
If you order one or several samples, each ESP32-Korvo V1.1 comes in an individual package which would contain:
ESP32-Korvo V1.1 mainboard
ESP32-Korvo V1.1 subboard
FPC cable
8 screws
4 studs
如购买样品，每个 ESP32-Korvo V1.1 将单独包装，内含：
ESP32-Korvo V1.1 主板
ESP32-Korvo V1.1 子板
FPC 排线
8 个螺丝
4 个螺柱
1.3 Description of Components
1.3 组件介绍
|
Key Componenet |
Description |
|
ESP32-WROVER-E |
This ESP32 module contains the latest ESP32-D0WD-V3, a 16 MB flash and a 8 MB PSRAM for flexible data storage, featuring Wi-Fi / BT connectivity and data processing capability. |
|
Power Regulator |
5V-to-3.3V regulator. |
|
Power Switch |
On: The board is powered on; Off: The board is powered off. |
|
Battery Port |
Connect a battery. |
|
USB Power Port |
Supply power to the board. |
|
USB-UART Port |
A communication interface between a computer and the ESP32-WROVER-E module. |
|
USB-UART Bridge |
Single USB-UART bridge chip provides transfer rates of up to 3 Mbps. |
|
Reset Button |
Pressing this button resets the system. |
|
Boot Button |
Download button. Holding down Boot and then pressing EN initiates Firmware Download mode for downloading firmware through the serial port. |
|
Micro SD Card Slot |
Useful for developing applications that access MicroSD card for data storage and retrieval. |
|
Audio ADC |
High-performance four-channel audio ADC. Among the four channels, three are for microphones, and one for AEC function. |
|
Audio PA |
Amplify audio signals to external speaker at maximum 3 W. |
|
Speaker Connector |
Connect an external speaker. |
|
Earphone Connector |
Connect external earphones. |
|
FPC Connector |
Connect mainboard and subboard. |
|
Audio Codec |
Audio codec ES8311 communicates with ESP32 via the I2S bus, which converts digital signals to analog signals. |
|
Analog Microphone |
Three analog microphone arrays (spacing = 65mm). |
|
RGB LED |
12 addressable RGB LEDs (WS2812). |
|
Function Button |
Six function buttons, i.e. PLAY, SET, VOL -, VOL +, MODE and REC. These function buttons are user-definable. |
|
主要组件 |
介绍 |
|
ESP32-WROVER-E |
这款 ESP32 模组内置 ESP32-D0WD-V3 芯片、16 MB flash 和 8 MB PSRAM，可灵活存储数据，具有 Wi-Fi / BT 连接和数据处理能力。 |
|
电源稳压器 |
5 V 转 3.3 V 稳压器。 |
|
电源开关 |
拨动至 On，开发板上电；拨动至 Off，开发板断电。 |
|
电池接口 |
连接电池。 |
|
USB 电源接口 |
为开发板供电。 |
|
USB 转 UART 接口 |
电脑和 ESP32-WROVER-E 之间的通信接口。 |
|
USB 转 UART 桥接器 |
单芯片 USB-UART 桥接器，可提供高达 3 Mbps 的传输速率。 |
|
Reset 键 |
按住此键使系统复位。 |
|
Boot 键 |
下载按键。按住 Boot 键的同时按一下 EN 键进入"固件下载"模式，通过串口下载固件。 |
|
Micro SD 卡槽 |
适用于需要扩充数据存储空间或备份的应用开发场景。 |
|
音频模数转换器 |
高性能四通道音频模数转换器，其中三个通道用于麦克风，一个通道用于回声消除 (AEC) 功能。 |
|
音频功率放大器 |
放大外接扬声器的音频信号，大至 3 W。 |
|
音频编解码器 |
音频编解码器 ES8311 通过 I2S 总线将数字信号转换为模拟信号与 ESP32 通信。 |
|
扬声器连接器 |
外接扬声器。 |
|
耳机连接器 |
外接耳机。 |
|
FPC 连接器 |
连接主板和子板。 |
|
模拟麦克风 |
三个模拟麦克风阵列，间隔 65 mm。 |
|
RGB LED |
12 个可寻址红绿蓝发光二极管 (WS2812)。 |
|
Function 键 |
六个功能键，分别是 PLAY, SET, VOL -, VOL +, MODE 和 REC。这六个功能键可由用户定义。 |
1.4 Default Firmware
The default firmware in ESP32-Korvo V1.1 allows you to experience voice wake-up and speech command recognition with on-board RGB LEDs.
After powering up your ESP32-Korvo 1.1 (mainboard and subboard connected by the FPC cable) and pressing the Reset button, please activate the board with the default wake word “Hi, Le Xin”, which translates in English as “Hello, Espressif”. When the wake word is detected, the 12 on-board RGB LEDs glow white one by one, meaning that the board is waiting for a speech command.
1.4 默认固件说明
乐鑫esp32-wifi ESP32-Korvo V1.1 默认固件通过控制板载 RGB LED，展示唤醒功能和命令词识别功能。
ESP32-Korvo V1.1 （用 FPC 排线连接主板和子板）上电并按下 Reset 键后，您可使用默认唤醒词“嗨，乐鑫”唤醒开发板。唤醒后，板载的 12 个 RGB LED 将被循环点亮为白色，表示设备正在等待命令词。
|
Default Speech Command (in Chinese) |
Meaning |
Response |
|
Guan Bi Dian Deng |
Turn off the light |
RGB LEDs go out. |
|
Da Kai Bai Deng |
Turn on the white light |
RGB LEDs glow white. |
|
Da Kai Hong Deng |
Turn on the red light |
RGB LEDs glow red. |
|
Da Kai Lv Deng |
Turn on the green light |
RGB LEDs glow green. |
|
Da Kai Lan Deng |
Turn on the blue light |
RGB LEDs glow blue. |
|
Da Kai Huang Deng |
Turn on the yellow light |
RGB LEDs glow yellow. |
|
Da Kai Cheng Deng |
Turn on the orange light |
RGB LEDs glow orange. |
|
Da Kai Zi Deng |
Turn on the purple light |
RGB LEDs glow purple. |
|
默认固件支持的命令词 |
设备反馈 |
|
关闭电灯 |
熄灭 RGB LED |
|
打开白灯 |
打开 RGB LED，显示白色。 |
|
打开红灯 |
打开 RGB LED，显示红色。 |
|
打开绿灯 |
打开 RGB LED，显示绿色。 |
|
打开蓝灯 |
打开 RGB LED，显示蓝色。 |
|
打开黄灯 |
打开 RGB LED，显示黄色。 |
|
打开橙灯 |
打开 RGB LED，显示橙色。 |
|
打开紫灯 |
打开 RGB LED，显示紫色。 |
If the command is not recognized, RGB LEDs returns to the state before voice wake-up.
如果没有识别到命令词，RGB LED 将恢复至唤醒前的状态。
1.5 Start Application Development
Before powering up your ESP32-Korvo V1.1, please make sure that it is in good condition with no obvious signs of damage.
1.5 开始开发应用
通电前，请确保乐鑫esp32-wifi ESP32-Korvo V1.1 完好无损。
1.5.1 Required Hardware
ESP32-Korvo V1.1
2 x USB 2.0 cable (Standard-A to Micro-B)
4-ohm speaker or earphones
Computer running Windows, Linux, or macOS
1.5.1 必备硬件
ESP32-Korvo V1.1
两根 USB 2.0 数据线（标准 A 型转 Micro-B 型）
4 欧姆扬声器或耳机
电脑（Windows、Linux 或 macOS）
1.5.2 Hardware Setup
Connect ESP32-Korvo V1.1 subboard to ESP32-Korvo V1.1 mainboard through the FPC cable.
Connect a 4-ohm speaker to the Speaker Connector, or connect earphones to the Earphone Connector.
Plug in the USB cables to the PC and to both USB ports of ESP32-Korvo V1.1.
Turn on the Power Switch.
The Power On LED (Red) should turn on.
1.5.2 硬件设置
1.使用 FPC 排线连接 ESP32-Korvo V1.1 子板和 ESP32-Korvo V1.1 主板。
2.将 4 欧姆扬声器接至扬声器连接器，或将耳机接至耳机连接器。
3.使用两根 USB 数据线连接电脑与 ESP32-Korvo V1.1 的两个 USB 接口。
4.打开电源开关。
5.电源指示 LED 应该亮红灯。
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