Tired of waiting for that Arduino sketch to upload? Find yourself limited by code space? Optiboot eases both of these problems. The package is an alternative bootloader that runs at a higher baud ...

The trick is that [Majek] has carefully modified the Arduino’s Optiboot bootloader so that it exposes a flash-write (SPM) command at a known location, so that he can then use this function from ...

which offers a ATmega328 microcontroller with Optiboot (UNO) Bootloader. The Metro 328 has been created to provide extra features on top of what you would expect from the Arduino Uno offering ...