Circular AI Voice Interaction Core Board (ESP32-S3)
This circular AI voice interaction core board pairs an ESP32-S3 dual-core 240 MHz processor with a dual-microphone array, a 1.85-inch capacitive touch TFT display interface, Wi-Fi and Bluetooth 5.0 — built for rapid productisation of AI speaking practice devices, smart badges, desktop assistants and robot voice modules.
Description
This circular AI voice interaction core board: an ESP32-S3R8 dual-core 240MHz processor, an onboard dual-microphone array and a 1.85-inch capacitive touch TFT display interface, with 2.4GHz Wi-Fi and Bluetooth 5.0. It suits rapid productisation of AI speaking practice devices, smart badges, desktop assistants and robot voice modules.
One circular AI core board that takes the hardware pain out of voice interaction
- ESP32-S3R8 dual-core AIoT processor @240MHz with 8MB in-package PSRAM
- Dual digital silicon mic array (48kHz PDM) with noise reduction and echo cancellation
- 1.85-inch capacitive touch TFT display interface for AI dialogue and device status
- 2.4GHz Wi-Fi + Bluetooth 5.0 (BLE) with an integrated dual-mode antenna
- One Type-C connector for power, flashing, debugging and data transfer
- 3.7V lithium battery input with charge/discharge management
- Spare GPIO, audio, display and debug interfaces for second-generation work
- Air ±4 kV / contact ±2 kV ESD, already verified in volume production
Onboard components
| # | Component | Description |
|---|---|---|
| 1 | ESP32-S3R8 SoC | Wi-Fi/BT SoC at 240MHz with 8MB in-package PSRAM |
| 2 | 128Mbit Flash | 16MB for program code, system resources and user data |
| 3 | Touch panel interface | Connects the capacitive touch panel |
| 4 | Display interface | FH35C-15S-0.3SHW(50) connector for a 1.85-inch TFT |
| 5 | USB Type-C port | DLDUSB-TYPE-C-16P; power, flashing and debug in one |
| 6 | Power / function button | DLD-AJ0306-35CN; long press to toggle, short press for function |
| 7 | Battery interface | 3.7V lithium battery with charge management |
| 8 | SPK audio interface | SH2-1.0-2P-LT socket, supports 4Ω / 8Ω speakers |
| 9 | Onboard antenna | Wi-Fi/Bluetooth dual mode, 2.4GHz + BLE 5.0 |
| 10 | Onboard digital mics | LMD2718B261-A1 dual array, 48kHz PDM |
Technical specifications
| Parameter | Specification |
|---|---|
| Wi-Fi | 802.11 b/g/n (2.4 GHz) |
| Bluetooth | Bluetooth 5.0 (BLE) |
| Processor | ESP32-S3R8 dual-core AIoT processor @240MHz |
| SRAM | 512 KB |
| PSRAM | 8 MB |
| Flash | 128 Mbit (16 MB) |
| Power input | USB Type-C 5V / 3.7V lithium battery |
| Operating voltage | 3.7 V |
| Charging current | 300 mA @5V |
| Power consumption | <60 mA @5V (sleep mode) |
| Speaker | 8Ω, 1.5 W |
| Microphone | Dual digital silicon mics, 48 kHz sampling |
| USB port | Type-C: power / flashing / debug / data |
| Buttons | Power on/off and function button |
| Peripheral I/O | GPIO, display, audio and debug |
| PCBA size | 50.11 × 49.36 mm |
| Device size | 58 × 58 × 17.2 mm |
| Operating temperature | -10 °C to 60 °C |
| ESD protection | Air ±4 kV; contact ±2 kV |
| Waterproof rating | Not waterproof |
Documentation
Need the full parameter set, or forwarding to an engineering team? Download the specification: Core Board Specification (EN)（PDF）
Application scenarios
- AI speaking practice and intelligent learning devices: With cloud AI dialogue services: AI speaking practice, real-time conversation, pronunciation correction and character interaction.
- Children’s story players and reading devices: Picture-book playback, voice-requested stories and interactive Q&A with subtitles on screen.
- AI companion badges and companion devices: The circular PCBA is a natural fit for badges, with anime-style character display and emotional companionship.
- AI desktop assistants and interaction terminals: Voice assistant, schedule reminders, weather and information display, smart home control.
- AI robot modules and voice cores: The voice interaction and intelligent control core of a robot, shortening integration cycles.
- Smart information terminals and guidance devices: Voice queries, route guidance, content playback and guided services for venues and retail.
- Other smart devices and rapid productisation: A general-purpose core platform that reduces development complexity and time to market.
How it compares with the finished device
| Dimension | AI voice interaction core board | AI Speaking Practice Device |
|---|---|---|
| Form factor | Circular core board Ø50.11 × 49.36 mm | Finished device Ø58 × 17.2 mm |
| Display | Onboard 1.85″ TFT + touch interface; panel as accessory | 1.85″ HD capacitive touch TFT |
| Battery | Add your own 3.7V lithium cell | Built-in 3.7V cell with charge management |
| Enclosure | No enclosure; develop your own housing | Mature circular housing, ready to use |
| Software | Firmware framework + SDK for custom builds | Ships with AI Practice / Translation / Wordbook |
| Best for | Teams with their own product definition | Projects that need to ship now or rebrand |
| Deliverables | Core board + engineering support + MP support | Finished unit + ODM/OEM + language customisation |
FAQ
Not sure whether this board fits your product? Send us your form factor, display and battery plan and we will advise on selection and the route to mass production.
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