GPS Data Logger with Wireless Trigger The software for our design is comprised of the following: NMEA ParsingLCD DisplaySD InterfaceConfiguration OptionsTrigger and Log WritingGoogle Earth Interface NMEA Parsing The GPS receiver can output data in the standard NMEA 0183 ASCII format or a manufacturer proprietary binary format. The binary format provides more information, but NMEA is easier to parse the needed information for this application, and is more compatible with desktop applications. For this application, we record three types of NMEA messages: GGA, GSA, and RMC.
For more information on the formatting of NMEA sentences, please see the References page Each message begins with a $ sign, and ends with a \r\n, with a maximum length of 80 characters which eases parsing. For our initial testing of the parsing code, we used a GPS simulator called gpsfeed+, which outputs varying GPS location data on the serial port of the computer. LCD Display SD Interface Configuration Options Trigger and Log Writing Google Earth Interface.
Blog » Blog Archive » Library for Libelium’s GPS module. Library for Libelium’s GPS module dcuartielles — April 21st, 2009 I have been a little slow the last two months in reporting about my Xmass presents. Being on parental leave but being forced to arrange the moving of my lab to a new building seem to be two incompatible actions, but they are perfectly possible here in Sweden. (c) 2009 BlushingBoy, GPS Shield on Arduino Mega Leaving excuses on the side, I got a little jealous about Tom posting how he uses the Mega; therefore I decided to push a little harder for a library I am writing for the guys at Libelium. They sent me their GPS module and I decided to make a simple wrapper for users to plug their Tyco-GPS modules to Arduino Diecimila/Duemilanove/Mega from Arduino’s IDE 13/14/15. The library is running on a modified version of SoftwareSerial, and uses two functions by M. On the other hand, on the Arduino Mega, 9KB is not even 10% of the available memory space.
(c) 2009 BlushingBoy, GPS Shield on Arduino Duemilanove. Neo FreeRunner GPS. Key pages on:Neo FreeRunner Basic Setup # opkg install gpsd # echo "GPS_DEV=\"/dev/ttySAC1\"" > /etc/default/gpsd and restart gpsd, the gps daemon, with # /etc/init.d/gpsd restart Note that there is a known issue between the GPS and SD card slot which is discussed here. Testing How to test your GPS with agpsui Shell test script for raw data dump: echo 0 > /sys/class/i2c-adapter/i2c-0/0-0073/neo1973-pm-gps.0/pwron && sleep 1s && echo 1 > /sys/class/i2c-adapter/i2c-0/0-0073/neo1973-pm-gps.0/pwron && stty -F /dev/ttySAC1 -echo && cat -u /dev/ttySAC1 | grep -v ^$ Note that the /sys paths have changed during kernel development. Very recent kernels (2.6.29-rc3 for example) use the following path: /sys/class/i2c-adapter/i2c-0/0-0073/pcf50633-regltr.7/neo1973-pm-gps.0 Low level access This section is for debugging and daemon development only.
There is no userland driver required for the GTA02; the serial port driver is built into the kernel. To turn on the GPS, echo 1 to the sys file: Using GPS GPS Daemons. RGM-3550LP GPS module connected with Asus Eee pc | YourITronics. The idea behind this project was born when a friend asked me too take a look at he’s broken GPS unit (MyGuide 3000) to see if I can fix anything. I started checking various parts like voltage regulators, but found nothing wrong. The gps unit was still not powering up so I checked the cpu, an ARM9 from Samsung and found it broken. Of course I couldn’t do anything about that, because of the BGA package and the bootloader needed after replacing it so the gps unit became a source for parts. The most useful and interesting parts from the GPS were the LCD display and the GPS module. The GPS module is a RoyalTek RGM-3550LP which has an integrated antenna and is powered by SiRF Star III technology.
The most common used UART-USB bridge is the FT232 manufactured by FTDI which is about $4 which is a fair price because you don’t need any external parts for this chip except some bypass capacitors and that saves you time and money. . More pictures: parts list: Gps tracking. GPS to SD-Card Data Logger.