Initial setup
Follow the guide to power on the device, connect to a 2.4 GHz Wi-Fi network, and configure a voice service.
Quick Start
ESP32-S3 connected voice terminal and development platform
BigSmart AI Assistant
Built around the ESP32-S3-WROOM-1-N16R8 module, BigSmart integrates two microphones, a speaker, a 2.8-inch touchscreen, a GC0308 camera, a six-axis IMU, and MicroSD. The repository includes electrical engineering files, enclosure source files, and documentation in Chinese and English.
ESP32-S3
16 MB Flash · 8 MB PSRAM
2.8-inch
320 × 240 · GT911 capacitive touch
Two-mic input
ES7210 ADC · ES8311 DAC
2 upstream merges
xiaozhi-esp32 · esp-brookesia
Onboard hardware
Key components and interfaces
The current hardware is built around the ESP32-S3-WROOM-1-N16R8 module. Its audio, display, camera, storage, and power configurations are listed below.
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Compute and connectivity
- Module
- ESP32-S3-WROOM-1-N16R8
- Memory
- 16 MB Flash / 8 MB PSRAM
- Wireless
- 2.4 GHz Wi-Fi / Bluetooth LE
- USB
- Type-C · 5 V power · native USB (D- GPIO19 / D+ GPIO20)
Audio path
- Physical mics
- 2 (MIC1 primary / MIC2 secondary)
- Input channels
- ES7210 four-channel ADC; MIC3 is the AEC reference, MIC4 is reserved
- Speaker path
- ES8311 DAC / NS4150B amplifier
- Digital audio
- I2S (MCLK / WS / BCLK / DIN / DOUT)
Display and sensing
- Display
- 2.8-inch ST7789 · 320 × 240 · RGB565
- Touch
- GT911 capacitive touch · I2C
- Camera
- GC0308 · DVP · 640 × 480 @ 16 FPS
- Motion
- QMI8658 six-axis IMU · I2C
Storage, power, and controls
- Storage
- MicroSD · SDMMC 1-bit (CLK / CMD / DAT0)
- Battery
- 3.7 V single-cell Li-ion · TP4057 charging
- Power path and sensing
- Automatic USB/battery switching · charge-state and battery-voltage sensing
- Controls
- Power · Boot (GPIO0) · custom (GPIO10) · WS2812B (GPIO43)
Firmware and documentation
Firmware, documentation, and development resources
The repository provides a prebuilt merged firmware image, operating documentation, and editable engineering files. RYMCU V2.3.28 includes connected voice services, local music playback, built-in games, and an NES launcher; the documentation covers initial setup, feature requirements, and flashing procedures.
Voice service configuration
Provider presets, custom server settings, and device binding
Local music playback
Read and play MP3 files from MicroSD
Built-in games and NES
Run built-in games or load NES ROM files from MicroSD
Feature reference
Review requirements and operating instructions for audio, touch, camera, MicroSD, IMU, MQTT, and other features.
User ManualHardware and enclosure revisions
Use the board EDA projects, STEP structural models, and Fusion 360 enclosure source as the basis for revisions.
View engineering filesContribute
Use Issues for reproducible defects, documentation gaps, and proposed improvements. Submit code and design changes through pull requests.
Open IssuesEngineering files
Mainboard, daughterboard, and enclosure engineering files
The repository includes LCSC EDA Professional projects, PDF schematics, and STEP structural models for the mainboard and microphone/button daughterboard, plus the Fusion 360 enclosure source. The Chinese and English documentation records components, interfaces, GPIO assignments, and firmware flashing requirements.
- Mainboard EDA project and schematic
- Microphone/button daughterboard EDA project and schematic
- Mainboard and daughterboard STEP structural models
- Fusion 360 enclosure source files
- Chinese and English hardware and flashing documentation
Upstream integration
Two BigSmart board integrations merged upstream
The public pull requests record the code changes, review history, and merge status for BigSmart board support in xiaozhi-esp32 and the BigSmart HMI integration in esp-brookesia.
Get started
Initial setup and firmware flashing
The Quick Start covers 2.4 GHz Wi-Fi provisioning, voice service configuration, and MicroSD resource preparation. The firmware notes list the available merged images, the 0x0 Flash offset, and the retained fallback release.