[oopic] Using ultra sonic sensor with the oopic

I am looking at using the oopic microprocessor with 5 to 10 Ultra sonic sensors (LV-MaxSonar-EZ4 Ultrasonic Range Finder). What I was wondering is it possible to connect this type sensor to the oopic digital I/O pins. The sensor supports PW RX, etc. How would I communicate? Would I need the expansion module to do this?

I have attached the link to data sheet
http://www.maxbotix.com/uploads/LV-MaxSonar-EZ4-Datasheet.pdf

Any help would be great and I can add any more details if needed

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