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How do Blutooth devices communicate? |
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BFTsync | Monday, 11 August 2008 11:18 |
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A Bluetooth device playing the role of "Master" can connect and communicate with up to 7 devices playing the role of "Slave". At any given time data can be transmitted between the Master and one Slave, however the Master can switch rapidly from Slave to Slave in a round-robin fashion.
Several communication protocols have been standardized by SIG, the most commonly used for mobile phone applications being the Headset Profile (HSP) and the Hands Free Profile (HFP). The HSP is the widely used protocol, enabling Bluetooth headsets to communicate with mobile phones. Normal controls include the ability to ring, answer a call, hang up and adjust the volume. The HFP protocol is considered a Killer Application for Bluetooth (a program that is so useful that people will buy a particular device simply to run that program) and is the most widely used protocol to connect mobile phones with Bluetooth hands-free car kits, like EGO. It uses synchronous connection to transmit data. |
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Last Updated on Thursday, 10 December 2009 01:04 |
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