OpenCM9.04A plus Accessory Set
The OpenCM9.04 is an open source ARM Cortex M3 board with CM-9 IDE inspired by Arduino. The OpenCM9.04 uses a STM32F103C8 (ARM Cortex-M3) as the processing system and allows 4 TTL Dynamixels (XL, AX, etc.) and comms devices (ZigBee & Bluetooth) to be connected easily. 16 GPIO are also available via a header strip.
NB. Soldering of connectors is required - more info here ....
User Manual >>