# Waveshare ESP32-S3-AUDIO-Board > ESP32-S3 AI smart speaker development board with dual-microphone array, ES8311 audio codec, 7 surround RGB LEDs, RTC, camera and LCD expansion interfaces, and LiPo battery support for voice assistant and audio projects. ## Quick Facts - **Brand:** Waveshare - **Board Type:** dev-board - **Price:** ~$15.99 - **Product Readiness:** developer - **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI vector instructions - **CPU Architecture:** Xtensa LX7 - **CPU Cores:** 2 - **RAM:** 512KB SRAM - **PSRAM:** 8MB - **Flash:** 16MB - **USB:** USB-C - **Power:** 5V via USB-C / 3.7V LiPo battery - **Operating Voltage:** 3.3V - **Battery:** 3.7V LiPo (sold separately) - **Antenna:** Built-in ceramic + IPEX-1 - **SD Card:** microSD ## Connectivity - **Wifi:** 802.11 b/g/n - **Bluetooth:** BLE 5.0 ## Open Source - **Firmware:** No - **Schematics:** Yes - **PCB Layout:** No ## Compatible Firmware arduino, esp-idf ## Use Cases - ai-voice-assistant - voice-assistant - music-player - internet-radio - smart-home-dashboard - computer-vision ## Components - **ESP32-S3R8** (mcu): Espressif ESP32-S3R8 Xtensa LX7 dual-core @ 240MHz with 512KB SRAM, 8MB PSRAM, WiFi and BLE 5.0 — [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=waveshare-esp32-s3-audio-board&source=md-export) - **ES8311** (audio-adc): Everest Semiconductor ES8311 24-bit mono audio codec with DAC/ADC and I2S interface for speaker output and microphone input — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F2108130930_Everest-semi-Everest-Semiconductor-ES8311_C2688009.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export) - **ES7210** (audio-adc): Everest Semiconductor ES7210 four-channel audio ADC for dual-microphone array with noise reduction — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdatasheet.lcsc.com%2Flcsc%2F2206010030_Everest-semi-Everest-Semiconductor-ES7210_C2919758.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export) - **TCA9555PWR** (io-expander): Texas Instruments TCA9555PWR 16-bit I2C GPIO expander with interrupt output — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Ftca9555.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export) - **PCF85063** (rtc): NXP PCF85063 real-time clock with integrated crystal, alarm function, and battery backup — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fdata-sheet%2FPCF85063A.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export) - **MP1605GTF-Z** (power-management): MPS MP1605GTF-Z synchronous buck converter providing 3.3V at up to 2A output — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.monolithicpower.com%2Fen%2Fdocumentview%2Fproductdocument%2Findex%2Fversion%2F2%2Fdocument_type%2FDatasheet%2Flang%2Fen%2Fsku%2FMP1605%2Fdocument_id%2F9426%2F&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export) - **WS2812B** (led-driver): 7x WS2812 addressable RGB LEDs in surround configuration for voice assistant visual feedback — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export) ## Protocols - **SPI** - **I2C** - **I2S** - **DVP** - **UART** ## GPIO Map | Pin | Name | Type | Functions | |-----|------|------|-----------| | GPIO3 | LCD_CS | SPI | digital-input, digital-output | | GPIO4 | LCD_SCK | SPI | digital-input, digital-output | | GPIO5 | LCD_BL | — | digital-input, digital-output, pwm | | GPIO7 | LCD_DC | SPI | digital-input, digital-output | | GPIO8 | LCD_MISO | SPI | digital-input, digital-output | | GPIO9 | LCD_MOSI | SPI | digital-input, digital-output | | GPIO10 | I2C SCL | I2C | digital-input, digital-output | | GPIO11 | I2C SDA | I2C | digital-input, digital-output | | GPIO12 | I2S MCLK | I2S | digital-input, digital-output | | GPIO13 | I2S SCLK | I2S | digital-input, digital-output | | GPIO14 | I2S LRCK | I2S | digital-input, digital-output | | GPIO15 | I2S_ASDOUT (mic) | I2S | digital-input, digital-output | | GPIO16 | I2S_DSDIN (speaker) | I2S | digital-input, digital-output | | GPIO40 | SD_SCK | SPI | digital-input, digital-output | | GPIO41 | SD_D0/MISO | SPI | digital-input, digital-output | | GPIO42 | SD_CMD/MOSI | SPI | digital-input, digital-output | ## Description ## Overview The Waveshare ESP32-S3-AUDIO-Board is an AI smart speaker development platform built around the ESP32-S3R8 module with 8MB PSRAM and 16MB flash. It integrates a complete audio pipeline featuring a dual-microphone array with ES7210 quad-channel ADC for noise reduction and echo cancellation, an ES8311 audio codec for playback, and a speaker output header. Seven surround WS2812 RGB LEDs provide visual feedback for voice wake-word detection and status indication, similar to commercial smart speakers. The board includes a PCF85063 RTC for time-aware applications and a TCA9555PWR 16-channel GPIO expander for additional I/O. Expansion is handled through an 18-pin SPI LCD FPC connector (supporting 1.47 to 3.5 inch Waveshare displays) and a 24-pin DVP camera interface compatible with OV2640/OV5640 sensors. The MX1.25 battery connector and built-in charging circuit enable portable operation, while the MP1605GTF-Z DC-DC converter provides efficient 3.3V power at up to 2A. ## Where to Buy - [Waveshare](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-audio-board.htm&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export) — $15.99 ## Resources - [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fesp32-s3-audio-board.htm&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export) - [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fwaveshareteam&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export) - [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.waveshare.com%2Fwiki%2FESP32-S3-AUDIO-Board&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export) - [schematics](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fwiki%2FESP32-S3-AUDIO-Board%2FESP32-S3-AUDIO-Board_1.1.pdf&ref=openhardware.directory&product=waveshare-esp32-s3-audio-board&source=md-export) - [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=waveshare-esp32-s3-audio-board&source=md-export) ## Tags `esp32-s3`, `audio`, `smart-speaker`, `microphone`, `voice-assistant`, `ai`, `rgb-led`, `rtc`, `waveshare` ## Images ![Waveshare ESP32-S3-AUDIO-Board](https://nbg1.your-objectstorage.com/openhardware-directory/entities/waveshare-esp32-s3-audio-board/2b857e369bc5.jpg) ![Waveshare ESP32-S3-AUDIO-Board](https://nbg1.your-objectstorage.com/openhardware-directory/entities/waveshare-esp32-s3-audio-board/b4f917257866.jpg) > **Battery Powered:** Li-Po --- [View full device page](https://openhardware.directory/devices/waveshare-esp32-s3-audio-board)