GPS Activity Logger

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/* GPS Activity Logger

This project is a portable device for logging GPS data during outdoor activities.

> It is built on the esp32 platform and uses the internal flash storage to save activities.

> The device includes a vibration sensor to have "always on" behavior.

> When motion is detected, it powers on and begins recording GPS data every 5 seconds.

After 3 minutes of no activity recordings are saved and it powers off.

> Recorded tracks are saved in flash storage and can be exported via serial connection to my linux machine,

then a python script generates a heatmap of my tracks.

View heatmap full screen

/* What I learned

> Initally I designed this project on the components that I had lying around on my bench,

The only displays that I had were some cheap 7 segment LEDS, these serverely limited the usefulness of my user interface.

> I used shift registers to control the 32 segment display pins,

The shfiting propagation delay prevented me from using pwm to dim the displays hence the blue tape.

> I need to incorporate a battery location in the inital design concideration.

> I did not include protection from multiple voltage input sources.

DO NOT plug into computer and turn on battery power, it will kill it.

> I need to add a low power auto power off feature, currently it will never stop discharging my LiPo battery.

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