Romeo V2- an Arduino Robot Board (Arduino Leonardo) with Motor Driver

RoMeo V2 [R3] is an All-in-One Arduino based robot board, it is especially designed for robotics applications, and extended devices. Romeo benefits from the Arduino open source platform, it is supported by thousands of open source projects, and can easily be expanded with Arduino Shields. The integrated 2 way DC motor driver and Xbee socket allows you to start your project immediatly without the need for an additional motor driver or wireless shield. 
 
Another improvement of Romeo V2 is that it supports stepper motor control. 
 
The RoMeo V2 [R3] behaves like Arduino Leonardo based on the ATmega32u4 chip,You can program it directly from the Arduino IDE 1.0.1 or later version. Because of the ATmega32U4 as it's sole microcontroller, RoMeo V2 is simple and easy to use. The 32U4 chipset handles the USB directly, code libraries are available which allow the board to emulate a computer keyboard, mouse, and more using the very interesting USB-HID protocol!  The best advantage is that ATmega32u4 has two serial ports which allows uploading sketches without removing wireless modules.  Debuging is no longer a painful task. 
 
Version History
Romeo V2 also improves the power supply, it has now a switch to select power source either from USB or external power.
Romeo V2.2 redesigns the power supply system to improve the stability of the ADC circuit. 

FEATURES
Wide operating input voltage
Directly support Xbee and XBee form factor wifi, bluetooth and RF modules
ON/ OFF switch to control the system power from external motor power
3 Digital I/O extensions (D14-D16)
S1 - S5 switch replace jump cap, allows free use for the GPIO.
Micro USB instead of A-B USB connector
Analog sensor extension port: Orange for Signal, Red for Vcc, Black for GND
Note:The analog sensor port pin mapping on RoMeo v2 is different from the old version.  Please select Arduino Leonardo board when using Arduino IDE.
 
SPECIFICATION
DC Supply: USB Powered or External 6V ~ 23V DC
DC Output: 5V(2A) / 3.3V DC
Motor driver Continuous Output Current:  2A
Microcontroller: ATmega32u4
Bootloader: Arduino Leonardo
Compatible with the Arduino R3 pin mapping
Analog Inputs: A0-A5, A6 - A11 (on digital pins 4, 6, 8, 9, 10, and 12)
PWM: 3, 5, 6, 9, 10, 11, and 13. Provide 8-bit PWM output
5 key inputs for testing
Auto sensing/switching external power input
Serial Interface
TTL Level
USB
Support Male and Female Pin Header
Built-in Xbee socket
Integrated sockets for APC220 RF Module and DF-Bluetooth Module
Three I2C/TWI Interface Pin Sets (two 90°pin headers)
Two way Motor Driver with 2A maximum current
One Stepper Motor Drive with 2A maximum current
Size: 89 x 84 x 14mm (3.50 x 3.31 x 0.55")

DOCUMENTS
Wiki Doc                                
Romeo V2 schematic
Tips for changing the sensor cable pin mapping
Romeo stepper motor library

PROJECTS
Raspberry Internet Rover(Based on Pirate 4WD platform and Romeo V2)
Hongkong biped robot using Romeo
Arduino RC Hack based on Romeo v1