Table of Contents

• 1. Introduction
• 2. Tasks
  • 2.1. Hardware components [1/2]
    • 2.1.1. DONE Logging: Arduino ↔ SD card
    • 2.1.2. TODO Location: Arduino ↔ GPS module
  • 2.2. Software tasks [2/4]
    • 2.2.1. DONE Read/write to SD card
    • 2.2.2. TODO Read GPS data over serial connection
    • 2.2.3. TODO Final assembly

Introduction

This is the source code for a simple GPS tracker built using

• an Arduino,
• the SD card shield from seeedstudio, and
• the Ultimate GPS module from Adafruit.

It uses the following libraries

• SD & SPI library from the Arduino IDE distribution
• Adafruit GPS library

We use Make to build the project, thanks to the Arduino-Makefile project.

Tasks

Hardware components [1/2]

DONE Logging: Arduino ↔ SD card

Pins used:

• CS: 4 (not sure what this is)
• In: 11
• Out: 12
• Clock: 13

TODO Location: Arduino ↔ GPS module

Understand how to connect the board in a circuit with the Arduino (https://learn.adafruit.com/adafruit-ultimate-gps)

• Send instructions: PIN?
• Read/log data: PIN?
• How do we know when we have a GPS fix?
• Solder button battery (CR1220) backup
• Design a simple circuit based on above understanding.

Software tasks [2/4]

DONE Read/write to SD card

Example program can be found in the test branch.

TODO Read GPS data over serial connection

Example echo-ing program from the Adafruit library can be found on the test branch.

TODO Final assembly

• SD+GPS: how to combine the logic in the setup()+loop() scheme?
• On power loss, revert to logging to GPS chip (under button battery power backup). When power is back, retrieve logs, and resume logging as before.