Mike @ Wi-Fi Toys
New World Record for Bluetooth Link!

The date: Wednesday, July 28th 2004
The time: 12:00 PM PDT
The test: Connect to a low-power Bluetooth cellphone from a distance of 1 kilometer

The result: Success!

...With a slight cable modification, this test shows that, based on previous research in the area, bluetooth functions (and exploits) can now be performed from distances thought to be impossible.

Is this unprecedented or are they just trying to sell bluedriving kits?

via MyAppleMenu

4 Comments

Well, it's the laws of physics. Even low power transmissions of less than 50mw can travel a very long distance in free air (i.e, without obstructions) and can be picked up if there isn't any interference from other 2.4GHz-emitting devices.

I would think you would have to point the antenna pretty accurately.

BFD -- with 802.11 I don't have distance limits because of this thing called the Internet.

Bluetooth can't do that because it just links two devices next to each other because it's vertical stack is the anti-Internet.

It's like saying you can shout loud enough to be heard a km away. Impressive but I'd rather use Skype.

ah, there was a talk on similar Bluetooth subject at BlackHat Briefings day before yesterday. presenter said a simple hardware hack attaching high gain antenna gives bluetooth chip so much extesive reach. cuz most of Bluetooth chips have fairly strong transmitter inside.

but this might have a negative side effect for some people who like to do "toothing".

Bob Frankston
BFD -- with 802.11 I don't have distance limits because of this thing called the Internet.

Bluetooth can't do that because it just links two devices next to each other because it's vertical stack is the anti-Internet.

Er, an important application of Bluetooth is to wirelessly connect a laptop computer or a PDA to a GPRS or 3G phone to access the Internet :-)

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Listed below are links to blogs that reference this entry: 1 km bluetooth file transfer.

TrackBack URL for this entry: http://joi.ito.com/MT-4.35-en/mt-tb.cgi/2652

Mobile phone manufacturers are addressing a security vulnerability that could allow an MSBlast-type worm to spread between Bluetooth devices. Read More

Bluetooth up to 1 KM from The Mobile Technology Weblog
August 4, 2004 9:52 PM

Joi Ito says that an experiment to test Bluetooth over 1 km was a success: ...With a slight cable modification, this test shows that, based on previous research in the area, bluetooth functions (and exploits) can now be performed... Read More

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