m5-docs/docs/en/base/node_base.md

Base Node

SKU:M017

Description

Node, like its namesake, is a smart node with full-featured functions in a IoT application scenarios. Together with M5Stack Core, it can be programmed as an intelligent speaker like Echo. Node provides more hardware resources: built-in high-fidelity audio codec chip，MIC, DHT12, IR

ESP32 provides an Audio Develope Platform called ESP-ADF. ESP-ADF supports development of audio applications for the Espressif Systems ESP32 chip in the most comprehensive way. With ESP-ADF, you can easily add features, develop audio applications from simple to complex:

• Music player or recorder supports audio formats such as MP3, AAC, FLAC, WAV, OGG, AMR, TS, EQ, Downmixer, Sonic, G.711, SPEEX ...
• Play music from sources: HTTP, HLS(HTTP Live Streaming), SPIFFS, TF-card(microSD), A2DP-Source, A2DP-Sink, HFP ...
• Integrate Media services such as: DLNA, WeChat ... Internet Radio
• Voice recognition and integration with online services such as Alexa, DuerOS, and more.

Product Features

• 1x 12 RGBs
• 1x temperature & humidity sensor(DHT12),which can display its own status and perception surrounding environment.
• 4x IR Transmitter LEDs at four corners and 2x IR Receivers
• 2x MIC

• 1x HiFi stereo codec chip ( Up to 24bit DAC )
• 1x 500mAh lithium battery

Include

• 1x Node Module
• Wall holder
• 4x screws
• 4x Type-C USB Cable

Applications

• Intelligent IOT node
• Webradio
• Intelligent sound box

Schematic

PinMap

ESP32	GPIO0	GPIO13	GPIO5	GPIO2	GPIO34	GPIO21	GPIO22	GPIO25
Codec Chip	I2S_CLK	I2S_WS	I2S_BCK	I2S_IN	I2S_OUT	I2C_SDA	I2C_SCL	L_OUT1

ESP32	GPIO15	GPIO35	GPIO12	GPIO21	GPIO22
node base	RGBLed(SK6812)	IR_Receive	IR_Send	DHT12_SDA	DHT12_SCL

Related Link

• Datasheet - WM8978

Example

• Voice control RGB light circle ( Chinese )

Video

NODE Case - Voice Recognition

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