I wanted to have a GPS data logger that I can record data for my hiking trail then import it to Google map with KLM file format.

Required components

1. Micro SD Card Breakout Board https://learn.adafruit.com/adafruit-micro-sd-breakout-board-card-tutorial/introduction
2. Arduino Pro Micro https://www.sparkfun.com/products/12640
3. GPS module ATGM336H GPS, small size with external antenna, see attached image. Other models would work but you might need to adjust the Arduino sketch.
4. 128 x 32 OLED i2 c module Available from Alipress, the case is designed to fit the module I have, so adjust the design and fit your own OLED.

Hook up guide

GPS to Arduino Pro Micro: GPS Module RX-> Pin 09 GPS Module TX-> Pin 08

OLED with i2C to Arduino Pro Micro: SDA->Pin02 SCL->Pin03

SD Module to Arduino Pro Micro: CLK->Pin15 MISO(DO)->Pin14 MOSI(DI)->Pin16 CS->Pin10

All the GND pin goes to GND Power pin goes to VCC on the Arduino

2020/Feb/13 **Still working in progress

1. Case printed.
2. All parts soldered and fitted into the box, tight fit, make sure you have short cable and cover the GPS module with heat shrink tube as it is not snugged anywhere in the box. The SDcard and Arduino snugged fit.
3. Sketch verified working and GPS location printed correctly on OLED

Next step:

1. Tidy up code and post to sketch
2. Further optimization of code, reduce update frequency if possible to save battery usage
3. Extract more data from the GPS, as of now I am only extracting 3.1 Latitude 3.2 Longitude 3.3 Time 3.4 # of locked satellite

Ideally, we should also get altitude, ground speed and etc.

2020/Mar/25 Had an issue it took very long for the GPS module to lock to the satellite when it is placed in the case, I removed some section around the antenna to expose all of it, that resolved the issue.

I have uploaded the Arduino sketch, there are reference to a push button but I decided no to use it but just left the section in the code.

Print Settings

Printer Brand:

Deltaprintr

Printer:

**Rafts:**

No

Supports:

**Resolution:**

0.3

Infill:

**Filament:** Esun PLA Green

Category: Outdoor & Garden