### 扬声器MAX98357A

VIN-3V3
GND-GND
SD-3V3
GAIN-GND
DIN-PD15
BCLK-PD12
LRC-PD13

### IMU

VCC-3V3
GND-GND
AD0-PD4
SDA-PD2
SCL-PD3
CS-PD5