The Arduino Nano R4 is a small yet powerful development board based on the RA4M1 microcontroller. It features 256 KB of Flash memory and 32 KB of RAM , along with 14 digital pins, 6 PWM channels, and 8 analog inputs . It supports standard communication interfaces such as UART, SPI, and two I2C interfaces (including one Qwiic-compatible connector), making it an excellent choice for rapid prototyping and implementation. This version comes with pre-soldered connectors , making it easy to use in your projects immediately.