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<meta name="Author" content="Remco Treffkorn">
<meta name="Description" content="GPSd is a utility that can listen to a GPS or Loran Receiver and re-publish the positional data in a simpler format.">
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<title>Bluetooth and GPSd</title>
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Blurtooth and <code>gpsd</code>
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<p>Jean-Michel.Bouffard, who is at CRC in Canada says that he's using
the Socket Bluetooth GPS receiver with gpsd. Here are his notes. The
Bluetooth protocol is including a serial profile that makes the use of
the Bluetooth GPS almost like a serial GPS.</p>
<ol>
<li>First, the Bluez protcol stack must be installed and all the
documentation can be found on <a
href='http://bluez.sourceforge.net/'>http://bluez.sourceforge.net/</a>.
In my case, I installed it on a Linux PC with a BT USB dongle but I'm
still trying to install it on my 3850 iPaq with a BT Sleeve. But once
BT is installed, the rest is the same.
<li>Install bluetooth for your device with the "rfcomm" module which is
the Serial profile (http://bluez.sourceforge.net/).
<li>Next, load the modules :
<pre>
# modprobe hci_xxx (xxx depend on your type of device)
# modprobe bluez
# modprobe l2cap
# modprobe rfcomm
</pre>
<li>Note : you must be the root user for the next part...
<li>If the modules have loaded successfully, type "hciconfig" and you
should see your BT device listed under the "hci0" name.
<li>Create the BT serial device (To do once, it will still be there after
a reboot):
<pre>
# mknod /dev/rfcomm0 c 216 0
</pre>
<li>Start your device and scan for remote BT device:
<pre>
# hciconfig hci0 up
# hcitool scan
</pre>
<li>Write down the adress of the newly found BT GPS receiver (looks like
xx:xx:xx:xx:xx:xx)
<li>Connect to the device:
<pre>
# hcitool cc xx:xx:xx:xx:xx:xx
</pre>
<li>You can chack if the connection is done by doing :
<pre>
# hcitool con
</pre>
<li>Start the serial protocol over BT :
<pre>
# rfcomm /dev/rfcomm0 xx:xx:xx:xx:xx:xx
</pre>
<li>After that, your BT GPS should be connected to /dev/rfcomm0 and you can
check by doing :
<pre>
# cat /dev/rfcomm0
</pre>
to see the NMEA GPS output
<li>You can then start gpsd like this:
<pre>
# gpsd -p /dev/rfcomm0
</pre>
to specify the path of the GPS and it will work exactly like a serial GPS
</ol>
<p>If something is unclear, write me back and I will try to help you...</p>
<p>Jean-Michel Bouffard</p>
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