Arduino USB 2 Serial Micro
Microcontroller
The official Arduino USB 2 Serial Converter (A000059) is a specialized adapter designed to translate serial TTL communication into standard USB signals. Powered by an onboard ATmega16U2 microcontroller programmed as a USB-to-serial converter, this board bridges your computer with microcontrollers that lack integrated USB interfaces—such as the Arduino Mini, Arduino Pro Mini, or standalone ATmega chips on a breadboard. Featuring a Mini-USB port and a pin header layout aligned with standard FTDI connections, it provides a direct, hassle-free link for uploading code and monitoring live serial debug data.
Unlike generic third-party serial adapters, this module includes hardware auto-reset functionality, automatically rebooting your target board whenever a new sketch is uploaded from the Arduino IDE. It also offers selectable 3.3V and 5V logic compatibility via onboard solder jumpers, protecting sensitive low-voltage microcontrollers and sensors. Compact and plug-and-play across major operating systems, the A000059 is an essential, reliable tool for developers building minimalist, space-constrained hardware projects.