Difference between revisions of "GPS daemon"

Revision as of 18:55, 9 June 2010

About

From gpsd website: gpsd is a service daemon that monitors one or more GPSes or AIS receivers attached to a host computer through serial or USB ports, making all data on the location/course/velocity of the sensors available to be queried on TCP port 2947 of the host computer. With gpsd, multiple location-aware client applications (such as navigational and wardriving software) can share access to receivers without contention or loss of data. Also, gpsd responds to queries with a format that is substantially easier to parse than the NMEA 0183 emitted by most GPSes. The gpsd distribution includes a linkable C service library, a C++ wrapper class, and a Python module that developers of gpsd-aware applications can use to encapsulate all communication with gpsd.

Installation

$ make menuconfig

Package Selection for the target  --->
    Hardware handling / blockdevices and filesystem maintenance  --->
        [*]   gpsd
                devices/protocol support  --->
                gpsd features  --->

• Let default devices/features if you don't know what they mean.

$ make

• reflash your rootfs

Usage

• gpsd is automatically launched at startup by /etc/init.d/S50gpsd. At first startup you may need to add the following line in the start() method of this script:

# nano /etc/init.d/S50gpsd


start() {
        stty -F /dev/ttySMX4 raw -echo -echoe -echok 38400
        echo -n "Starting $NAME: "
        start-stop-daemon -S -q -p $PIDFILE --exec $DAEMON -- -P $PIDFILE $DEVICES && echo "OK" || echo "Failed"
}

Links

• gpsd website