SPECIFICATIONSBrand Name: M5StackChoice: yesHigh-concerned chemical: noneModel: ATOM EchoOption1: ATOM EchoOption2: Atomic Echo BaseOption3: ASR UnitOption4: ATOM EchoS3ROrigin: Mainland ChinaType: ESP SeriesPlease note order optionalOption1 ATOM EchoOption2 Atomic Echo BaseOption3 ASR UnitOption4 ATOM EchoS3R M5Stack ATOM Echo Programmable Smart Speaker ESP32 Development Board Product Features Light and small Support STT services Based on ESP32, Support A2DP 2.4G Wi-Fi IEEE 802.11b/g/n Built-in microphone and speaker RGB LED status display indication GROVE extension interface Record and playback Programmable key Programming platform: Arduino, ESP-IDF/ADF Applications BT Speaker Voice control IoT Package Includes 1x ATOM ECHO Specification Resources Parameter SoC: ESP32-PICO-D4,240MHz,Dual Core,Wi-Fi Flash: 4MB Interface: 1x IR-TX,1x Function Button,1x Reset Button PinOut: G21/G25/5V/GND, 3V3/G22/G19/G23/G33 RGB LED: SK6812 Speaker: 0.8W/NS4168 I2S Microphone: SPM1423 PDM Net weight: 5g Gross weight: 10g Product Size: 24*24*17mm Package Size: 85*65*17mm Case Material: Plastic (PC) Product details Schematic Real Photos Product Description ATOM ECHO is a Programmable Smart Speaker based on the M5ATOM design. Its form factor is very small, its dimensions are only 24 * 24 * 17 mm. Music can be played using the BT capabilities of the ESP32 from a mobile phone or tablet. The device could be programmed to access AWS, Baidu and other cloud platforms, using the built-in microphone and speaker for voice interaction, so that ATOM ECHO has certain AI capabilities, realizing voice control, story telling, Internet of things and other functions. The speaker is embedded with an RGB LED (SK6812), which can visually display the connection status. In addition to being used as a BT speaker, it still has the control ability of Atom series.Screw hole on the back is convenient for users to fix. Kindly Remind 1, The Factory Test firmware is BT speaker, which uses A2DP protocol to transmit audio data(call reception is not supported). After power on, the red LED will be displayed. When the connection with BT device is established, the LED will turn green. At this time, the sound can be output through atom echo. The LED turns red when disconnected. The firmware is compiled on the esp-idf platform. If senior users need to develop other functions by themselves, they can build the environment according to the official documents of Espressif. See the following links for the source code of factory firmware and bin file, where the BIN file burning address is 0x0000.2, Echo already supports HomeAssistant! The latest shipped devices with the sticker ESPHome FW Pre-installed for HomeAssistant have pre-burned ESPHome firmware, users can refer to the following link .Detailed tutorial reference Tutorials for setting up the M5Stack Atom Echo as a voice assistant for Home Assistant.For those who are not using Home Assistant, you can flash the device with EasyLoader firmware, to resume the device to Factory Test status.3, G19 / G22 / G23 / G33 has been defined, please do not reuse the above pins, otherwise ATOM ECHO will be damaged.Note: please avoid such conditions with M5Stack Atom Echo.DC output from I2S channelPlaying white noise for a long timePlaying full square-wave audio EasyLoader Tutorials for setting up the M5Stack Atom Echo as a voice assistant for Home Assistant Product Description The Atomic Echo Base is a voice recognition base designed specifically for the M5 Atom series. It uses an integrated solution with the ES8311 mono audio decoder, MEMS microphone, and NS4150B power amplifier. The ES8311 offers 24-bit audio resolution and a sample rate of 16KHz to 64KHz, supporting I2S communication and high-fidelity audio processing. The MEMS microphone with high signal-to-noise ratio (SNR) is suitable for automatic speech recognition, while the built-in speaker ensures efficient audio output. The device supports full-duplex communication, enabling simultaneous voice transmission and reception, enhancing interactive features such as speech recognition, wake-up, and audio playback. It is ideal for applications in smart homes and education. PinMap M5Stack Atomic Echo Base Product Features Compatible with the M5 Atom series Voice recognition Mono audio codec MEMS microphone Class-D amplifier Speaker Development platform UIFlow 1.0 UIFlow 2.0 Arduino IDE Applications AI voice recognition interactive systems Smart home control Package Includes 1x Atomic Echo Base Specification Specification Parameter Audio Codec: ES8311: 24-bit resolution, I2S protocol MEMS Microphone: MSM381A3729H9BPC, SNR ≥ 65 dB Power Amplifier: NS4150B: Class-D power amplifier Speaker: 2014-type cavity speaker: 1W@8Ω Standby Current: DC3.3V/3.36mA Operating Current: DC3.3V/14.84mA Operating Temperature: 0-40°C Product Size: 24.0 * 24.0 * 14.14mm; Packaging Size: 85.0 * 65.5 * 15.0mm Packaging Weight: 12.5g; Product Weight: 6.3g Please note: MIC Sampling Rate The Atomic Echo Base microphone supports a sampling rate range of 16KHz-64KHz. Product Comparison Product details Schematics Module Size M5Stack Unit ASR CI-03T AI Intelligent Offline Voice Module Product Features CI-03T AI intelligent offline voice module Noise reduction processing 42 pre-installed commands Supports up to 300 command words UART serial communication Supports custom wake-up word Microphone and speaker Development platforms: UIFlow 1.0 UIFlow 2.0 Arduino IDE Applications AI Assistant Smart Home Security Monitoring Automotive Systems Robotics and Smart Hardware Healthcare Package Includes 1 x Unit ASR 1 x HY2.0-4P Grove cable (20cm) Specification Specification Parameter AI Module: CI-03T AI Intelligent Offline Voice Module Command Words: Supports up to 300 command words, Factory default 42 built-in commands Wake-up Method: UART serial communication or voice keyword wake-up Microphone: Analog microphone Speaker: 8Ω@0.8W speaker (used for output device wake-up feedback) Communication: UART serial communication, default baud rate: 115200@8N1 Noise Reduction: AEC (Acoustic Echo Cancellation) Power Consumption: Standby Current: DC5V / 47.73mA; Operating Current: DC5V / 250.12mA Operating Temperature: 0-40°C Product Size: 48.0 x 24.0 x 16.0mm; Product Weight: 10.5g Packaging Size: 136.0 × 92.0 × 13.0mm; Packaging Weight: 15.8g Product details Schematics Module Size PinMap HY2.0-4P Black Red Yellow White Port.C GND 5V TX RX Product Description Unit ASR is an AI offline voice recognition unit, built with the CI-03T AI intelligent offline voice module. The unit offers powerful capabilities such as speech recognition, voiceprint recognition, voice enhancement, and voice detection. It supports AEC (Acoustic Echo Cancellation), effectively removing echoes and noise interference, thereby enhancing voice recognition accuracy. It also supports mid-conversation voice interruption, allowing flexible interruption during voice recognition and quick response to new commands. The product comes pre-configured with 42 English wake-up words and feedback command words. It uses UART serial communication for data transmission and supports awakening the device via UART or voice keywords. The unit also supports user-customizable modification of multi-language wake-up recognition words by regenerating the firmware and can recognize up to 300 command words. Equipped with a microphone for clear audio capture and a built-in speaker for high-quality audio feedback, this product is widely used in AI assistants, smart homes, security monitoring, automotive systems, robotics, smart hardware, and healthcare. It is an ideal choice for implementing intelligent voice interaction. M5Stack Atom EchoS3R Programmable IoT Voice Interaction controller Product 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 Applications BT Speaker Voice control IoT Package Includes 1x ATOM EchoS3R Specification 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 + 8Ω@1W 1318 cavity speaker Operating Temp: 0 ~ 40°C Product Size: 24.0 x 24.0 x 16.8mm Product Weight: 9.3g Package Size: 85.0 x 65.0 x 17.0mm Gross Weight: 15.6g Product Comparison Product details Product Description 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. Kindly Remind Download ModeTo flash the firmware, press and hold the reset button (about 2 seconds) until the internal green LED lights up, then release it. The device is now in download mode and ready for flashing.
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