mini-gps

a gps location device

details

• down to 3 meters of precision
• realtime determination of velocity accurate to 0.1 knots
• powered by 2 AA batteries (8-10 hours of battery)

hardware

• esp32 devkit-c
• Adafruit 2.4" ILI9341 display
• Adafruit GPS Module (MTK33x9 Chipset)

software

• FreeRTOS
• TFT_eSPI
• Adafruit GPS Library

todo:

hardware

• consider different display
• apply power supply upgrade

gui

• increase display of fix precision
• add cardinal direction with heading (ex: NW @ 345 deg)
• consider EST rather than UTC

firmware

• add last know time of fix to flash memory
• implement deep sleep / soft power state control
• battery precentage and estimated power on time remaining