3D perspective render of the CoreZero S3 controller board with USB-C and 40-pin header

3D angled render showing CoreZero S3 components and IO0 and RESET buttons

3D rear render of CoreZero S3 with unchanged development pinout and QR artwork

RASPIAUDIO CoreZero S3

26,99€

Available on backorder

CoreZero S3 is designed and currently supported exclusively with RASPIAUDIO Voice DSP+. It comes preloaded with ESPHome for this Home Assistant voice-assistant integration, as a budget-conscious controller alternative to a Raspberry Pi for this specific role.

26,99 € includes the controller and external antenna only. Voice DSP+ and a suitable Home Assistant installation are required separately.

DIY: combine the two boards in your own assembly. Prefer a preassembled enclosure and speaker? Choose the Full Speaker package.

RASPIAUDIO CoreZero S3

ESPHome for your Voice DSP+.

Designed and currently supported exclusively with RASPIAUDIO Voice DSP+, CoreZero S3 comes preloaded with ESPHome for this Home Assistant voice-assistant integration.

A budget-conscious controller alternative to a Raspberry Pi for this specific role, not a Linux computer. A suitable Home Assistant installation is still required.

CoreZero S3 component-side 3D render with transparent background — 3D render. Original board artwork preserved.

THE CONTROLLER

One specific role. A simpler voice build.

ESPHome preloaded: the ESP32-S3 handles the voice-satellite application, local wake-word detection and Wi-Fi connection to Home Assistant.
Voice DSP+ handles audio: microphones, beamforming, acoustic echo cancellation, noise processing and speaker playback are supplied by the separate audio board.
Connect the two boards: the 40-pin connection carries I2S audio and I2C/SPI integration. Follow the documented pin mapping and assemble with power off.
Home Assistant remains separate: a working Assist pipeline is needed; local or cloud speech services depend on your configuration.

CHOOSE YOUR BUILD

DIY, or the complete speaker.

Build your own integration

Buy CoreZero S3 and Voice DSP+ separately to create your own assembly, without the Full Speaker enclosure and external speaker. Add the power, audio and enclosure components your build needs.

Voice DSP+ for a DIY build

Choose the preassembled solution

The Full Speaker brings the controller and Voice DSP+ together with its enclosure and speaker in a complete preassembled package. A suitable Home Assistant installation is still required.

View the Full Speaker package

IN THIS OFFER

Controller + antenna. 26,99 €.

Included: one CoreZero S3 controller board and one external antenna.

Voice DSP+, its microphones, speaker, enclosure, power supply, USB cable and Home Assistant server are not included in this standalone controller offer.

SPECIFICATIONS

Hardware at a glance.

Module	ESP32-S3-WROOM-1U-N16R8.
Processor	Dual-core 32-bit Xtensa LX7, up to 240 MHz; 512 KB internal SRAM.
Memory	16 MB Quad SPI flash and 8 MB Octal SPI PSRAM.
Wireless	2.4 GHz Wi-Fi and Bluetooth Low Energy; U.FL-compatible external antenna connector. Antenna included.
Connections	USB-C for power and programming; 40-pin header with GPIO, I2S, I2C and SPI.
Buttons	IO0 and RESET.
Dimensions	65 × 30.70 mm. Pi Zero-inspired mounting arrangement, not universal Raspberry Pi HAT compatibility.

SETUP & SOURCE

Follow the Voice DSP+ integration guide.

Home Assistant setup, ESPHome configuration and source. Check the installation requirements and release notes for your firmware version.

Product views are 3D renders, not photographs. The original artwork carries the development name “ZeroCore S3”. Use the board documentation, not render artwork, for wiring.