M5Stack Atom VoiceS3R (C126-ECHO) – voice unit with mic and speaker (ESP32-S3)

The Atom VoiceS3R is a small voice unit from M5Stack: an ESP32-S3 with a microphone, speaker and audio codec in a 24 × 24 mm case. With ESPHome it becomes a voice satellite for Home Assistant: you say a command, and Home Assistant interprets and answers.

Former name: M5Stack first sold this unit as the Atom EchoS3R. The SKU C126-ECHO is the same, and guides and ESPHome configurations for the Atom EchoS3R also apply to the Atom VoiceS3R. Not to be confused with the older Atom Echo (C008-C), which has an ESP32-PICO.

Works with

• ESPHome (ESP32-S3, ES8311 audio codec supported)
• Home Assistant via ESPHome
• Arduino IDE, ESP-IDF and PlatformIO
• UIFlow 2 (M5Stack's block programming)

Good to know

There is no ready-made Home Assistant firmware to download; you write or fetch an ESPHome configuration yourself. The unit also has a built-in IR transmitter, so it can control a TV, for example.

You also need

A USB-C data cable (not charge-only) and a 5 V power supply.

Specifications

Documentation and certification

• Product documentation (M5Stack)
• Manufacturer certifications (CE/RED/RoHS)

Manufacturer: M5Stack Technology Co., Ltd, Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen, China, [email protected]. EU representative: Success Courier SL, Calle Rio Tormes 1, Planta 1, Derecha, Oficina 3, 28947 Fuenlabrada, Madrid, Spain, [email protected].

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