Bluetooth is a very practical wireless communication technology, so that it is a very attractive choice to build a short-distance wireless ad hoc network. Piconet is the basic Bluetooth network. Several piconets connected in a certain way could form a scatternet, which could broaden more application scenarios. The point-to-point Bluetooth audio transmission can't meet the increased needs, so the research and development of Bluetooth audio product is still an issue, the research difficulties is how to connec...