Royaltek RBT-2300 and Karmic Koala
I recently had to make use of a GPS logger in Linux. Here’s how I made it work in Karmic, incase any one is interested:
- First, make sure you have necessary bluetooth packages. If not, install it using:
sudo apt-get install bluetooth
sudo apt-get install libbluetooth-dev
- Switch on the GPS, scan and check if you can find the device:
sudo hcitool scan
The output would be something like the following:
Scanning ...
00:aa:bb:cc:dd:ee BlueGPS CCDDEE
We are interested in the channel in which the device operates. Let’s find that out:
sudo sdptool records 00:aa:bb:cc:dd:ee
This will give you lots of information about the device. Pay attention to the channel. For instance, my device says:
Service Name: Dev B
Service RecHandle: 0x10000
Service Class ID List:
"Serial Port" (0x1101)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
<strong>Channel: 1</strong>
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
- Use this channel to create an entry in the
rfcomm.conf
file:
sudo gedit /etc/bluetooth/rfcomm.conf
enter the following at the end of the file:
# Bluetooth GPS
rfcomm2 {
bind yes,
device 00:aa:bb:cc:dd:ee,
channel 1,
comment "Serial Port",
}
Once you have done this, you can connect to the device:
$ sudo rfcomm connect 2
Connected /dev/rfcomm2 to 00:aa:bb:cc:dd:ee on channel 1
Press CTRL-C for hangup
- I found rtkgps (http://wohlberg.net/public/software/misc/rtkgps/) to be a good utility to access GPS logs.
rtkgps -d /dev/rfcomm2 read