image/svg+xml LED4 LED2 LED1 LED3 PWR MSD CDC HID 5V P0_23 RST 3V3 P0_24 P0_25 P0_26 P1_30 P1_31 VIN GND IOREF GND P2_12 UART SDA GND SCL 3V3 TX GND RX 3V3 BUTTON SPI I2C P2_13 P0_28 P0_27 GND P0_9 P0_6 P0_1 P2_4 P2_3 P0_5 P0_7 P4_28 P4_29 P0_8 P0_0 P2_5 P2_2 P0_4