The M5Stack Atom EchoS3R is a compact IoT voice controller built for smart voice and AI interaction projects. Powered by the ESP32-S3-PICO-1-N8R8, it offers Wi-Fi, 8MB Flash, and 8MB PSRAM for versatile development. With an ES8311 audio codec, MEMS microphone, and NS4150B amplifier, it delivers clear voice capture and quality soundideal for AI assistants and smart home control. The M5Stack Atom EchoS3R is a programmable IoT voice interaction controller designed for intelligent voice control and human-computer interaction scenarios. It is powered by the ESP32-S3-PICO-1-N8R8 main control chip, supports 2.4GHz Wi-Fi wireless communication, and comes with 8MB Flash and 8MB PSRAM to meet diverse application development needs, offering excellent performance and scalability. The audio system adopts an ES8311 mono codec, combined with a high-sensitivity MEMS microphone and an NS4150B power amplifier, enabling clear voice pickup and high-fidelity audio output to enhance voice recognition and interactive experiences. It is suitable for voice interaction scenarios such as AI voice assistants and smart home control. Features Integrated ESP32-S3-PICO-1-N8R8 main controller 8MB Flash and 8MB PSRAM ES8311 mono audio codec MEMS microphone Class D amplifier Integrated infrared transmitter Expandable pins and interfaces Development Platform Arduino UiFlow2 ESP-IDF PlatformIO Specifications Specification Parameter SoC ESP32-S3-PICO-1-N8R8 @ Dual-core Xtensa LX7 processor, up to 240MHz PSRAM 8MB Flash 8MB Power Input DC 5V Audio Codec ES8311: 24-bit resolution, I2S protocol Microphone MEMS microphone, Signal-to-Noise Ratio (SNR): 65dB Speaker NS4150B amplifier chip + 8@1W 1318 cavity speaker Operating Temp 0 ~ 40C Product Size 24.0 x 24.0 x 16.8mm Product Weight 9.3g Resources Documentation Package Contents 1x Atom EchoS3R Smart Speaker Dev Kit