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System Configuration Variables:

  • set the followin variables in the Fleet Configuration application side tab

    • RESIN_HOST_CONFIG_dtoverlay = hifiberry-dac

  • NGROK_AUTH : If you want to manage your ngrok tunnel the ngrok interface.

  • NGROK_REGION : the region you want your tunnel to go through.

  • SPOTIFY_USER : Your user name on spotify (NB: Needs to be premium account)

  • SPOTIFY_PASS : password for the spotify user above.

TODO:

General Structure:

  • add a queue to share data between threads

Music Related:

  • ~~ serve the webUI over ngrok channel ~~
  • ~~ point cache files to /data ~~
  • ~~ move to external audio (pHat) ~~
  • ~~ create a shaunmulligan/mopidy base image ~~
  • create a state/flow diagram
  • ~~ control player via https://github.com/ismailof/mopidy-json-client ~~
    • ~~ need to check that mopidy is ready~~
      • ~~ Should allow play/pause and next track functions~~
    • ~~ need to be able to check current state.~~
  • ~~ print grok URL on dashboard using: https://github.com/peakwinter/python-ngrok ~~
  • get events from mopidy websocket (??)
  • add a timeout in "Alive check" incase mopidy never starts up
  • better exception handling when loading playlist, etc.
  • perhaps use [alsamixer] option to select which audio card to use.
  • mount SDcard in modem to /mnt/music if it exists and allow mopidy to read from that location for local music
  • ~~ [failed] look at improving sound output by following: http://forums.pimoroni.com/t/howto-get-phat-dac-to-play-all-system-sound-software-volume-control/2361 ~~
  • figure out why https causes issues. (it seems because the websocket they use is not secure, i.e: wss instead of ws)
  • figure out how to make the Iris port default to 80 instead of 6680 (https://github.com/jaedb/Iris)
  • broadcast the grok URL using pyeddystone example.
  • add dtoverlay=i2s-mmap to config.txt
  • Huawei E3131 http://hi.link == 192.168.8.1
    • get signal strength

Input:

  • Mode Selection:
    • music control
    • volume control
  • control music playback functionality via GPIO
    • ~~ next_track ~~
    • ~~ toggle (play/pause) ~~
  • control volume
    • up
    • down
  • GPS session:
    • start
    • stop

GPS related:

  • ~~ get A-GPS working on Ultimate GPS Hat.~~
  • ~~ Figure out how to discover/probe the GPS tty port.~~ Not needed
  • ~~ be able to read NMEA sentences from the GPS port.~~
  • ~~ convert nmea to GPX track (https://gist.github.com/ppearson/52774)~~
  • be able to detect if the device has a Fix or not. (need to pull this out of nmea sentence)
  • ~~ write the NMEA sentences to a file in /data with a time stamp of when the run started. I think as a .gpx file which Strava can consume ~~
  • ~~ draw a gpx track on google maps with JS: https://github.com/peplin/gpxviewer ~~ Use strava instead
  • Fix errors with synchronising GPS uart baud rate and failure to write EPO file.
  • ~~ Add coin battery to improve TTFF. ~~
  • Use resin.io dashboard location to feed first location Configuration
  • custom GPS location to the resin.io dashboard: curl 'https://api.resinstaging.io/v2/device(54327)' -X PATCH -H 'Authorization: Bearer BEARER_TOKEN' -H 'Content-Type: application/json;charset=UTF-8' --data-binary '{"custom_latitude":"51.5074603461279","custom_longitude":"-2.6978302001953125"}' —compressed
  • periodically (10seconds?) convert nmea file into GPX and extract info using https://github.com/tkrajina/gpxpy:
    • Distance
    • average pace
    • moving time
  • extract GPS fix quality from NMEA with https://github.com/Knio/pynmea2

Output

  • four RBG neopixels to indicate status: neopixels require the same gpio as i2s audio :/
  • 128*64 OLED LCD with i2c interface:
    • GPS Fix
    • Current Song
    • Distance
    • levels:
      • 3G signal level
      • volume level
      • battery level (maybe)
  • Vibro haptic output:
    • warnings
    • when GPS locks/fix
    • every 1km

Misc:

Hardware:

  • create circuit diagram
  • figure out how to measure battery levels
    • use ADS1x15 if there is space in the enclosure
  • figure out how to mount the SIM card with Huawei E3131 module

Optimisation

  • remove alsa-utils (??)
  • possibly remove libav

import pynmea2 msg = pynmea2.parse("$GPGGA,173004.000,5132.2394,N,00002.7293,W,2,09,0.90,26.1,M,47.0,M,0000,0000*4E")