GPS data logger with SD card

thingiverse

I wanted to build a GPS data logger for my hiking trail and import it into Google Maps using KML 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, a small-sized model with an external antenna (see attached image); other models might work, but adjustments to the Arduino sketch may be needed. 4. 128 x 32 OLED I2C Module - available from Alipress; the case is designed to fit my module, 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 -> Pin 02 - SCL -> Pin 03 SD Module to Arduino Pro Micro: - CLK -> Pin 15 - MISO (DO) -> Pin 14 - MOSI (DI) -> Pin 16 - CS -> Pin 10 All GND pins go to GND, and the power pin goes to VCC on the Arduino. 2020/02/13 - Still working in progress: 1. Case printed. 2. All parts soldered and fitted into the box; make sure to use short cables and cover the GPS module with heat shrink tube as it is not snugly fit inside the case; the SD card and Arduino have a snug fit. 3. Sketch verified working, and GPS location printed correctly on OLED. Next Steps: 1. Tidy up code and post it to Sketch. 2. Further optimization of code to reduce update frequency if possible to save battery usage. 3. Extract more data from the GPS; currently extracting: - Latitude - Longitude - Time - Number of locked satellites Ideally, we should also get altitude, ground speed, etc. 2020/03/25 - Issue resolved: I had an issue where it took a long time for the GPS module to lock onto the satellite when placed in the case; removing some sections around the antenna to expose all of it resolved the issue. I uploaded the Arduino sketch, which includes references to a push button but decided not to use it and left the section in the code.