ATOM EchoS3R Smart Speaker Development Kit

The ATOM EchoS3R is a compact, programmable smart speaker development kit specifically designed for intelligent voice control and human-machine interaction. At its core is a powerful ESP32-S3 dual-core microcontroller with 240 MHz, offering 2.4 GHz WiFi connectivity. Additionally, 8 MB Flash and 8 MB PSRAM are available, ensuring high performance and sufficient memory for complex IoT and AI applications. The device is ideal for voice interaction scenarios such as AI voice assistants or smart home controls. With its integrated audio components, the ATOM EchoS3R can clearly capture voice commands and reproduce them with high quality, enabling an optimal user experience. Its compact dimensions (24 × 24 × 16.8 mm) and low weight of only 9.3 g allow for seamless integration into almost any project, from your own desktop voice assistant to voice control in the connected home. Furthermore, the module features an integrated IR transmitter, which allows traditional devices (e.g., TV or air conditioner) to be controlled by voice. Developers benefit from the support of multiple programming platforms (Arduino, MicroPython/UiFlow, ESP-IDF), significantly facilitating commissioning and prototyping. Thus, the ATOM EchoS3R kit provides a comprehensive all-in-one solution to easily integrate voice interaction into one's projects.

Features:

Powerful ESP32-S3 dual-core microcontroller (Xtensa LX7 up to 240 MHz) with 8 MB Flash and 8 MB PSRAM for demanding applications.
Integrated 2.4 GHz WiFi module enables wireless network connectivity for IoT and cloud applications.
ES8311 audio codec and NS4150B class-D amplifier deliver clear sound in combination with the 1 W (8 Ω) speaker.
Highly sensitive MEMS microphone (signal-to-noise ratio 65 dB) for precise voice capture and reliable voice recognition.
Integrated infrared transmitter (IR sender) for controlling external devices such as TVs or air conditioners by voice command.
Expandable interfaces thanks to Grove-compatible PORT A and additional IO pins for connecting further sensors, actuators, or modules.
Flexibly programmable via common development platforms such as Arduino, UiFlow (MicroPython), ESP-IDF, or PlatformIO.
Compact design and robust enclosure (only 24 × 24 × 16.8 mm, 9.3 g) for easy integration even in limited spaces.

Application Examples:

Use as a personal AI voice assistant that understands voice commands and independently performs actions.
Integration into smart home systems to conveniently control lights, heaters, or other household devices by voice.
IoT prototyping: as a central control module in IoT projects to operate devices or sensors via voice commands and retrieve data.
Education and research: Ideal for educational purposes or experiments in the field of voice recognition and artificial intelligence to implement innovative voice projects.
Voice-controlled remote control: Controls conventional infrared devices (e.g., TV, audio system) through spoken commands via integrated IR sender.

Documentation:

M5stack Wiki

Atom EchoS3R Voice Assistant for Home Assistant

Official M5Stack Forum

Specifications:

Manufacturer: M5Stack
Manufacturer SKU: C126-ECHO
Processor: ESP32-S3-PICO-1-N8R8 (dual-core 32-bit microcontroller, 240 MHz)
Memory: 8 MB Flash, 8 MB PSRAM
Connectivity: WiFi 2.4 GHz (802.11 b/g/n)
Audio Codec: ES8311 (24-bit, I2S)
Audio Amplifier: NS4150B (Class D)
Microphone: MEMS, SNR 65 dB
Speaker: integrated, 8 Ω / 1 W
Infrared: integrated IR transmitter (GPIO 47)
Interfaces: USB-C (data/power), Grove-compatible port (I2C), programmable button, reset, expansion pins
Power Supply: 5 V DC via USB-C (no battery)
Operating Temperature: 0 °C to 40 °C
Dimensions: 24.0 × 24.0 × 16.8 mm
Weight: 16g