Bluetooth Team 1 What is Bluetooth? Origins Ericsson, 1994 - PowerPoint PPT Presentation

Bluetooth Team 1

What is Bluetooth? ● Origins ○ Ericsson, 1994 ○ Harald Bluetooth ● Today ○ Bluetooth Special Interests Group ○ Compatible with a multitude of devices ○ Widespread ○ IEEE Standard ○ Secure ○ Wireless ○ Low Power Consumption

Bluetooth Advantages ● Wireless ○ 30+ foot range ● Directionless ● Multiple simultaneous connections ● Global standard

Bluetooth Versions ● Seven major versions of Bluetooth ● Three common versions seen today ○ Bluetooth 2.1 + EDR ○ Bluetooth 3.0 + HS ○ Bluetooth 4.1 + BLE

Bluetooth Operation ● Pairing - Existential Awareness ● Connecting - Shared Channel ● Connected devices form piconet ● Master-Slave structure ○ Master has up to 7 slaves ● Multiple connected piconets form a scatternet

Frequency Hopping ● Frequency range: 2.4 - 2.485 GHz ● Frequency Hopping ○ 79 frequency channels ○ 1600 hops / sec ● Unintentional shared channel unlikely ○ Lasts for tiny amount of time

Bluetooth In Our Project ● Sensors > Arduino > Android ● Android pairs with Arduino ○ Android uses device discovery ● Establish serial connection ○ Android master, Arduino slave