CLUE board management & data collection

The repo is managed into a monorepo style, so each folder holds an application that runs in different places.

Note that there are sub-READMEs with notes specific to that app:

• CLUE README
• collector README

• clue: Adafruit CLUE - nRF52840 Express w/Bluetooth LE
  • can either mean the hardware device itself
  • or the software for it, in the clue folder at this level
• collector: software that listens for clue output & writes it to log files for later use

• differentiate CLUE screen output
  • right now, just outputs the same lines
  • would be better to have a status
• collector status messages
  • collector just sits in silence while running
  • should have some sort of periodic output w/status
  • perhaps "X messages collected in last hour"??
• data analysis
  • perhaps a jupyter notebook or something
  • that can plot out data for a particular time period
  • using old data files seems fine to start
    • but eventually watching for new data eventually
• other forms of connectivity
  • CURRENTLY, only supports USB connection from CLUE to connector
  • but CLUEs support bluetooth, for instance
  • so perhaps I could setup a number of them running independently
    • w/a server that's collecting from multiple at a time