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TECHNOLOGY > Bluetooth
What is Bluetooth?
From the official Bluetooth website:
"Bluetooth wireless technology is a short-range communications system intended to replace the cables connecting portable and/or fixed electronic devices. The key features of Bluetooth wireless technology are robustness, low power, and low cost."
Physical layer (RF) operates in the 2.5GHz band and ranges are dependent on device class:
* Class 3 radios – have a range of up to 1 meter or 3 feet
* Class 2 radios – most commonly found in mobile devices – have a range of 10 meters or 30 feet (this is most common)
* Class 1 radios – used primarily in industrial use cases – have a range of 100 meters or 300 feet
SparkFun BlueSMiRF (Basic)
The BlueSMiRF is a wireless Bluetooth modem for serial communication, using RX/TX.
Specifications (as listed on Sparkfun):
* FCC Approved Class 1 Bluetooth Radio Modem
* Operating Voltage: 3V-6V
* Low power consumption : 25mA avg
* Capable of communicating with one other device
* Encrypted connection
* Frequency: 2.4~2.524 GHz
* Serial communications: 2400-115200bps
* Operating Temperature: -40 ~ +70C
* Built-in antenna
Getting Started
* Bluetooth Setup Assistant on Mac OS X (Windows screenshots, step-by-step instructions available in datasheet)
* Basic AT commands - allows you to name your device
* Physical setup
Security
* Bluetooth security issues
* Hacking methods to be aware of: Bluesnarfing, Bluejacking, Bluesmacking, Car Whisperer
References:
- The Bunker Security Brief: http://www.thebunker.net/security/bluetooth.htm
- Trifinite Group > Bluesnarf: http://trifinite.org/trifinite_stuff_bluesnarf.html
- Bluetooth Security Review, Part 1: http://www.securityfocus.com/infocus/1830
- Bluetooth Security Review, Part 2: http://www.securityfocus.com/infocus/1836
Main Circuit Schematic
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