Editing Personal area network (section)

===Bluetooth===
[[File:Subaru_Legacy_handsfree.jpg|thumb|An in-car microphone connected to a [[Bluetooth]] receiver designed to receive calls from a connected cell phone - an example of a WPAN]]
Bluetooth uses short-range radio waves. Uses in a WPAN include, for example, Bluetooth devices such as keyboards, pointing devices, audio headsets, and printers that may connect to [[smartwatch]]es, [[cell phone]]s, or computers. A Bluetooth WPAN is also called a ''[[piconet]]'', and is composed of up to 8 active devices in a master-slave relationship (a very large number of additional devices can be connected in ''parked'' mode). The first Bluetooth device in the piconet is the master, and all other devices are slaves that communicate with the master. A piconet typically has a range of {{convert|10|m}}, although ranges of up to {{convert|100|m}} can be reached under ideal circumstances. Long-range Bluetooth routers with augmented antenna arrays connect Bluetooth devices up to {{convert|1000|ft}}.<ref>{{cite web|url=https://www.iotworldtoday.com/2017/09/11/cassia-networks-secures-patent-long-range-bluetooth/|title=Long-range Bluetooth: Cassia Networks secures patent|website=www.iotworldtoday.com|access-date=2019-09-09|archive-date=2022-08-03|archive-url=https://web.archive.org/web/20220803192505/https://www.iotworldtoday.com/2017/09/11/cassia-networks-secures-patent-long-range-bluetooth/|url-status=live}}</ref>

With [[Bluetooth mesh networking]] the range and number of devices is extended by using [[mesh networking]] techniques to relay information from one device to another. Such a network doesn't have a master device and may or may not be treated as a WPAN.<ref>{{cite web |last=Boxall |first=Andy |url=https://www.digitaltrends.com/mobile/bluetooth-5-release-news/ |title=Faster, Longer, And More Capacious: Bluetooth 5 Is Here |publisher=Digital Trends |date=2016-12-08 |access-date=2019-12-18 |archive-date=2019-07-30 |archive-url=https://web.archive.org/web/20190730051541/https://www.digitaltrends.com/mobile/bluetooth-5-release-news/ |url-status=live }}</ref>