Bluetooth Final Version

8/3/2019 Bluetooth Final Version

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Bluetooth



Electromagnetic

waves:Electromagnetic waves have the samecharacteristic parts as mechanical waves

(e.g., wavelength, amplitude, frequency,etc), but they behave very differently.While mechanical waves need somethingto move in e.g., air or water,

electromagnetic waves can travel in avacuum. Another important characteristicof electromagnetic waves is that they willtravel in a straight line unless something

changes their course (e.g., think of a laser



Types of electromagnetic

waves



Radio wavesRadio waves have the longest wavelengths of

the spectrum. To give you an idea of how longradio waves can be AM radio waves can belonger than a football field, while FM radiowaves are short in comparison – only about 3meters long!



History:Before getting into the technology, the word

Bluetooth is intriguing all on its own, and

deserves a look. The term is far less hightech than you might imagine, and finds itsroots in European history. The King of Denmark was renowned for his ability to helppeople communicate, his name HaraldBlatand (in English)... Harald Bluetooth.

Another item worth investigating is theBluetooth logo, shown above. Based oncharacters from the runic alphabet (used in



introductionLook around you at the moment, you have

your keyboard connected to the computer,as well as a printer, mouse, monitor and soon. What (literally) joins all of thesetogether, they are connected by cables.Cables have become the bane of manyoffices, homes etc. Bluetooth essentially

aims to fix this, it is a cable-replacement technology





Short-Range Wireless

Solutions





1,900 Bluetooth

Technology Manufactures

BluetoothBluetooth

(Special(SpecialInterest Group)Interest Group)



Different between wireless and

BluetoothWireless

Example:

Infrared Light:low

frequence1-line to sight

2-one to one



Radio module



BluetoothIt communicates on a frequencyof (2.45 gigahertz ) actually

between 2.402 GHz and 2.480GHz, to be exact



For making a

connection1.) Inquiry (or Discovering)

Procedure

2.) Paging (or Connecting) Procedure





Local Area

Network

)LAN(

Bluetooth DevelopmentBluetooth Development

Wireless

PhoneNetwork

• Small Network• Large Throughput• IR or Radio Communication• Relays not used• Fixed with limited mobility

• Small Distances

• Large Network• Small Throughput• Radio Communication• Relays used• Mobility

• Large Distances



how Bluetooth operatesBluetooth signal weak (1 mwat)

Spread-spectrum frequency hopping





New applicationsNew applications

• Casio G-Shock Casio G-Shock smart watchsmart watch

• Casio hasCasio hascreated its firstcreated its firstBluetoothBluetooth SmartSmart

device—a watchdevice—a watchthat's able tothat's able tocommunicatecommunicatewirelessly with awirelessly with a

BluetoothBluetooth SmartSmart



Other new applicationsOther new applications

• Motoactv

• This tiny newBluetooth Smartdevice It lets youlisten to musicwith Bluetooth

wirelessheadphoneswhile running or

other includes



Other new applicationsOther new applications

• Dayton heart-rate strap

• The strap uses anew Bluetooth v4.0

low energy chipfrom NordicSemiconductorUsers won't need aspecial matchingwatch like mostheart-rate monitors

• the strap can bepaired with a

phone or other



Thank youAny questions??

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Bluetooth Final Version