The ESP32-S3-Korvo-2 is a multimedia development board based on the ESP32-S3 chip. It is equipped with a two-microphone array which is suitable for voice recognition and near/far-field voice wake-up applications. The board integrates multiple peripherals such as LCD, camera, and microSD card. It also supports JPEG video stream processing. With all of its outstanding features, the board is an ideal choice for the development of low-cost and low-power network-connected audio and video products.
ESP32-S3-Korvo-2
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ESP32-S3-WROOM-1 Module |
The ESP32-S3-WROOM-1 is a powerful, generic Wi-Fi + Bluetooth LE MCU module that is built around the ESP32-S3 series of SoCs. On top of a rich set of peripherals, the acceleration for neural network computing and signal processing workloads provided by the SoC make the modules an ideal choice for a wide variety of application scenarios related to AI and Artificial Intelligence of Things (AIoT), such as wake word detection, speech commands recognition, face detection and recognition, smart home, smart appliances, smart control panel, smart speaker, etc. |
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Left Microphone |
Onboard microphone connected to ADC. |
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Audio ADC Chip |
ES7210 is a high-performance, low-power 4-channel audio analog-to-digital converter for microphone array applications. It is very suitable for music and speech applications. In addition, ES7210 can also be used to collect acoustic echo cancellation (AEC) echo reference signals. |
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Audio Codec Chip |
The audio codec chip, ES8311, is a low power mono audio codec. It consists of 1-channel ADC, 1-channel DAC, low noise pre-amplifier, headphone driver, digital sound effects, analog mixing and gain functions. It is interfaced with ESP32-S3-WROOM-1 module over I2S and I2C buses to provide audio processing in hardware independently from the audio application. |
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Audio PA Chip |
NS4150 is a EMI, 3 W mono Class D audio power amplifier, amplifying audio signals from audio codec chips to drive speakers. |
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Right Microphone |
Onboard microphone connected to ADC. |
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Speaker Output Port |
Output socket to connect a speaker. The 4-ohm and 3-watt speaker is recommended. The pins have a 2.00 mm/0.08” pitch. |
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USB-to-UART Bridge Chip |
A single chip USB-UART bridge CP2102N provides up to 3 Mbps transfers rates for software download and debugging. |
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USB-to-UART Port |
Functions as the communication interface between a PC and the ESP32-S3-WROOM-1 module. |
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USB Power Port |
Provides power to the board. It is recommended to use at least 5V/2A power adapter to ensure stable power supply. |
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Battery Socket |
Two pins socket to connect a single cell Li-ion battery. |
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Power Switch |
Power on/off knob: toggling it down powers the board on; toggling it up powers the board off. |
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Battery Charger |
Constant current and constant voltage linear charger for single cell lithium-ion batteries AP5056. Used for charging of a battery connected to the Battery Socket over the Micro USB Port. |
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Function Press Keys |
Six press keys labeled REC, MUTE, PLAY, SET, VOL- and VOL+. They are routed to ESP32-S3-WROOM-1 module and intended for development and testing of a UI for audio applications using dedicated API. |
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Boot/Reset Press Keys |
Boot: holding down the Boot button and momentarily pressing the Reset button initiates the firmware upload mode. Then you can upload firmware through the serial port.
Reset: pressing this button alone resets the system.
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MicroSD Slot |
The development board supports a microSD card in 1-bit mode, and can store or play audio files in the microSD card. |
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LCD Connector |
A FPC connector with 0.5 mm pitch to connect LCD extension board. |
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System LEDs |
Two general purpose LEDs (green and red) controlled by ESP32-S3-WROOM-1 module to indicate certain operation states of the audio application using dedicated API. |
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Camera Connector |
An external camera module that can be connected to the development board with a connector to transmit images. |
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