Data Sheet

The Windows 8 Device Manager in “Devices by connection” mode, showing that
the A-Star is a composite device.
On a Linux computer, you can see details about the A-Star’s USB interface by running lsusb -v -d 1ffb: in a
Terminal. The virtual serial port can be found by running ls /dev/ttyACM* in a Terminal.
On a Mac OS X computer, the virtual serial port can be found by running ls /dev/tty.usbmodem* in a Terminal.
You can send and receive bytes from an A-Star’s virtual serial port using any terminal program that supports
serial ports. Some examples are the Serial Monitor in Arduino IDE, the Pololu Serial Transmitter Utility
[http://www.pololu.com/docs/0J23], Br@y Terminal [http://sites.google.com/site/terminalbpp/], PuTTY
[http://www.chiark.greenend.org.uk/~sgtatham/putty/], TeraTerm [http://ttssh2.sourceforge.jp/], Kermit [http://www.columbia.edu/
kermit/ck80.html], and GNU Screen [http://www.gnu.org/software/screen/]. Many computer programming environments also
support sending and receiving bytes from a serial port.
Pololu A-Star 32U4 User’s Guide © 2001–2014 Pololu Corporation
8. The A-Star 32U4 USB interface Page 40 of 47