Additional/Alternate i/o of the ATmega328PB
For Cricket ONE (beta)
The ATmega328PB has additional i/o pins but more importantly has alternate/extra UART, SPI, and I2C (amongst other differences). The Arduino Minicore makes these extra i/o easily usable in sketches. Pololu makes a 328PB mini board but the Single Board Solutions' board has a USB/FTDI onboard. The RPi headers provide easy i/o connectivity even if you're not using a Pi.
