Info
product url -
Board Map, Dimension, Pins, chip info, Use Guide, Setup Jumper, etc.
ES8311-SDK-dat - ES8311-dat - everest-semi-dat - ES7201-dat - codec-audio-dat - I2S-dat
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GND
VCC
3V3DO == 6 WS == 4 DI
SCK == 5 MCK == 2SCL == 19 SDA == 18
Applications, category, tags, etc.
// 1. Define your pins clearly
#define I2S_BCLK 5
#define I2S_LRCK 4
#define I2S_DOUT 6
#define I2S_MCLK 2
#define I2C_SDA 18
#define I2C_SCL 19
Demo Code and Video

ref
legacy wiki page