Open source bike GPS: with Strava segments !
This application is an open-source small form-factor bicycle GPS computer.
Included features:
Autonomy depends on the use: it uses <8mA in indoor mode (100+ hours), and around 35mA in outdoor modes (30+ hours).
This project uses Nordic nRF52840, a Cortex M4F MCU which can do BLE/ANT+ RF communications.
The PCB can be found under: https://github.com/vincent290587/EAGLE/tree/master/Projects/myStravaB_V3
The BOM costs around 100€
Must be compiled with GCC 6 2017-q2-update and nRF SDK V16.0 with softdevice s340 V6.1.1
/!\ The USB bootloader must be programmed before using the dfu targets (found in dfu subfolder)
cd pca10056/s340/armgcc
make
make flash_softdevice (or) make dfu_softdevice
make flash (or) make dfu
Outdoor modes:
Indoor mode:
Menu: