Bertrand Lemasle 0e0a0d495e Added LICENSE.md and README.md		6 年前
library	Fix SIM808 reset pin being tied to hardware reset. Fixed ground pads on sdcard	7 年前
.gitignore	Major building blocks are there	7 年前
.gitmodules	Major building blocks are there	7 年前
LICENSE.md	Added LICENSE.md and README.md	6 年前
README.md	Added LICENSE.md and README.md	6 年前
_autosave-gpstracker.pro	Finsihed routing	7 年前
fp-lib-table	Fix SIM808 reset pin being tied to hardware reset. Fixed ground pads on sdcard	7 年前
gpstracker-cache.lib	Specified conda and resistors. PCB needs to be updated (usb condo from 1210 to 0805)	7 年前
gpstracker-interface.sch	Fixed LED6 & LED7 being polarity reversed	7 年前
gpstracker.csv	Updated schematics references with updated and available parts. This is the version that was ordered on Mouser/Seeedstudio	7 年前
gpstracker.kicad_pcb	Reported last changes from schematics to PCB	7 年前
gpstracker.kicad_pcb-bak	Reported last changes from schematics to PCB	7 年前
gpstracker.net	Reported last changes from schematics to PCB	7 年前
gpstracker.pro	Fix libraries path to enhance portability accross different machines	7 年前
gpstracker.sch	Reported last changes from schematics to PCB	7 年前
gpstracker.xml	Updated schematics references with updated and available parts. This is the version that was ordered on Mouser/Seeedstudio	7 年前

README.md

High autonomy GPS tracker.

A custom Arduino 2 layers board meant to be use with a dedicated firmware. The result is a high autonomy GPS tracker that can be use to track moving vehicules.

See the firmware repository for more info.

Hardware

This project has been build on a ATMega328p for its ease of use, low power consumption and wide support.

On top of that, several ICs are needed :

SIM808 : GPRS & GPS.
DS3231 : Real Time Clock, used for time keeping and battery saving.
24LCxxx : EEPROM used to buffer raw data before sending.

Soldering

Solering this circuit board requires either the use of soldering paste or fine soldering skills. The SIM808 IC can indeed be quite hard to solder by hand because of its form factor that requires you to solder each one of its 64 pins separately instead of the usual flux and drag technique. Moreover, the shape of each pin make it very easy to solder several pins together or soldered with not enough tin to make a reliable connection.