M5Stack ATOM Echo Programmable Mini Smart Speaker Development Kit ESP32 Voice Control Module with BLE/Wi-Fi for IoT Prototyping & DIY Projects

SoC: ESP32-PICO-D4, 240 MHz, Dual Core, Wi-Fi

Flash: 4 MB

Interface: 1 x IR-TX, 1 x Button, 1 x Reset Button

PinOut: G21/G25/5V/GND, 3V3/G22/G19/G23/G33

RGB LED: SK6812

Speaker: 0.8 W / NS4168 (I²S)

Microphone: SPM1423 (PDM)

Enclosure: Plastic (PC)

Product Weight: 5 g

Gross Weight: 10 g

Product Size: 24 x 24 x 17 mm

Package Size: 85 x 65 x 17 mm

Atom Echo is a programmable smart speaker based on the ATOM design. Extremely compact at just 24 x 24 x 17 mm, it can stream music by connecting—via the ESP32’s wireless functions—to a phone, tablet, etc., or play designated streaming media over Wi-Fi. To simplify voice usage, Atom Echo integrates an STT (speech-to-text) service. Flash the dedicated firmware to enable it and issue voice commands to perform diverse operations. You can also write your own code to connect to cloud platforms such as AWS or Google; using the built-in microphone and speaker, Atom Echo can provide AI capabilities for voice control, smart interaction, IoT, and more. An on-board RGB LED (SK6812) clearly indicates connection status. In addition to serving as a smart speaker, it retains the control abilities of the ATOM series—you can connect external devices through the GROVE port. An M2 screw hole on the back facilitates mounting.

Pin Usage Precautions: G19 / G22 / G23 / G33 have been predefined. Do not reuse these pins; otherwise the Atom Echo may be damaged. Playback Precautions: To prevent damage to the Atom Echo, avoid the following operations: Outputting a DC signal through the I2S channel Playing white noise for long periods Playing full-scale wave square audio

1. Compact design: Ultra-small 24 x 24 x 17 mm body for easy integration into various environments.

2. Voice command capabilities: Built-in STT service for seamless interaction with smart devices.

3. Enhanced connectivity: Supports Wi-Fi IEEE 802.11 b/g/n, BLE 4.0, and A2DP streaming.

4. Cloud integration: Programmable for AWS, Google, and other cloud platforms using ESP-IDF/ADF or Arduino.

5. Clear status indication: RGB LED display for real-time connection status feedback.

1 x Atom Echo