 The Create replaces its Roomba predecessor's vacuum cleaner hardware with a cargo bay that also houses a DB-9 port providing serial communication, digital input & output, analog input & output, and an electric power supply.The Create also has a 7-pin Mini-DIN serial port through which sensor data can be read and motor commands can be issued using the iRobot Roomba Open Interface (ROI) protocol.The platform accepts virtually all accessories designed for iRobot's second generation Roomba 400 Series domestic robots and can also be programmed with the addition of iRobot's own Command Module (a microcontroller with a USB connector and four DE-9 expansion ports).