Kochab

A low-power handheld GNSS receiver.

Features

Overview

• GNSS capability (GPS, GLONASS, Galileo, and BeiDou)
• Lower-power 400x240 monochrome LCD display and MCU
• Projected one month runtime on two AA batteries
• Support for multiple coordinate systems
  • Lat/long: DMS, DMM, DD
  • MGRS
  • UTM
  • Maidenhead
• Configurable display parameters:
  • Altitude MSL: ft, m
  • Time: local, UTC
  • Speed: mph, kph, kts, ft/s, m/s
  • Tripmeter: mi, km, NM, ft, m
  • Projected battery life remaining
• Configurable update periods for time and position to save battery life
  • Automatic update mode: 1 second
  • Periodic update mode: configurable up to 4 hours (updates manually triggerable)
  • Manual update mode: manually triggered

Parts

• MCU: STM32L010RB
• GPS: u-blox SAM-M10Q
• LCD: Sharp LS027B7DH01A

Building

Prerequisites

• Windows 10 (x64)
• STM32CubeMX 6.8.0
• STM32CubeIDE 1.15.1

Setup

1. Clone the repo into a workspace accessible by STM32CubeIDE.
2. Open STM32CubeMX load the project Kochab.ioc.
3. Generate the project code, downloading any dependencies if prompted.
4. Open and build with STM32CubeIDE.