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Senior Design using cc2431

Other Parts Discussed in Thread: CC2431, CC2531


I'm a member of a EE Senior Design team at the University of Colorado in Boulder. My group wants to determine the location and placement of bicycles on a small course around a building. We have been looking into the ti chip cc2431 (determine location through ZigBee). I have been watching videos and this technology seems to be exactly what we need. We would set up reference nodes around the course and have the bikes (blind nodes) ride through them. This project idea could also be applied to baggage claim at the airport. A bag would have a blind ZigBee node and the this would be able to track its location on a given course using a network of reference nodes.

We have a few questions though:

1. Can there be more than one blind node at a time? (For example: can we send a signal to find all blind nodes) If so, does each blind node have an individual address to access each ZigBee location?

2. How many nodes would we need in a network to get accuracy of ~3 meters around a decent sized building?

3. What is the signal range?

4. How much does one chip cost?

5. Does the software in the video still exist?

6. Are there any better ti chips? (The cc2531 doesn't have the location engine)