ProtoPropDuo Breakout board allowing a Raspberry Pi Pico to interface with up to two FeatherWing boards. RP2040 Peripheral Usage for Feather Wings SPI: SCK: SPI1 SCK MOSI: SPI1 TX MISO: SPI1 RX I2C: SDA: I2C1 SDA SCL: I2C1 SCL