Config for my moto harpia to turn it into a bike computer. We will
need

- working gps
- bluetooth (ble) stuff
- wayland "cage" compositor
- an app
- rsync service so that trails can be downloaded to a computer
- ip connectivity with flight mode
 - give it telent and dandroid as APs
 - use rfkill aggressively to save battery
 

Absent any reason I should not write the app in fennel I'm going to
write the app in fennel. I want it to

- display speed/cadence/time of day/power
- show where I am on a map
- record trail of where I've been (note: indoor counts too)

we can use l"ove2d instead of dragging in that gtk stuff

   SDL2

   To run an SDL2 application on Wayland, set
   SDL_VIDEODRIVER=wayland. 

can we do bluetooth not through dbus? dbus seems to make it flakey



cool extras
===========

adjust screen brightness (go dark when not moving)