Programs for scanning for Bluetooth devices and logging the results. There are two programs:

1. bluetrax_scan uses periodic inquiry mode. It returns a timestamped record every time a device is detected. If a device is detected many times, a record is returned for each detection. The program scans almost continuously, except for a Uniform(1.28s, 2.56s) gap between scans, as required by the specification.

2. bluetrax_basic_scan uses the higher-level HCI inquiry API. This is provided mainly for reference; it is probably better to use bluetrax_scan.

These programs produce output in a packed binary format. To decode the output into text (CSV), use bluetrax_scan_unpack and bluetrax_basic_view with the above, respectively. For example, to monitor a scan interactively run

./bluetrax_scan -u | ./bluetrax_scan_unpack

You can run the scan on any Linux machine with a Bluetooth device. But, it helps if you have an antenna. A friend of mine produced a nice write-up of an experiment using this code including info on the hardware.

Bluetrax uses BlueZ, the official Linux Bluetooth protocol stack.

On Debian:

sudo apt-get install libbluetooth-dev

On Angstrom:

opkg install bluez4-dev

To build, just run

make

(The MIT license.)

Copyright (c) 2011-2012 John Lees-Miller

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