https://github.com/sorja/indoorloc

https://github.com/sorja/indoorloc

Last synced: 8 days ago
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• Host: GitHub
• URL: https://github.com/sorja/indoorloc
• Owner: sorja
• Created: 2015-12-02T19:57:17.000Z (almost 9 years ago)
• Default Branch: master
• Last Pushed: 2015-12-11T08:37:53.000Z (almost 9 years ago)
• Last Synced: 2023-08-04T21:04:51.183Z (over 1 year ago)
• Language: Java
• Size: 7.68 MB
• Stars: 0
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# indoorloc

## Install

Easiest way through Android Studio.

Just hit run.

## Thoughts

In the end, it was way easier to create the algorithm then I was expecting.

Everything could be redone, with way less fatigue.

## Steps to create indoor location O(n²):

  - Finger prints!

    - Get enough mac - rssi pairs with XYZ position.

    - When getting the location, go thru the saved fingerprints, let's call this list allfingerprints and the current 'you are here' fingerprint called here as currentfingerprint

    - Find the closest match, ex. pseudo:

##### Here you could also just go with the EUCL. distance instead of doing it in another method after.

##### Like mentioned above, everything could be done faster better harder stronger

```

minfp = null;

min = int_max;

foreach fp : allfingerprints

  foreach currfp : currentfingerprint

    if fp.mac equals currfp.mac

        int diff = abs[fp.rssi - currfp.rssi]

        if diff < min

          minfp = currfp

          min = diff

return minfp

```

## Final thoughts

  - Java = horrible (not as horrible as some other...)

  - Algo = easy, no real algo here imo, nearest neighbour

  - Very low amount of experience with android, seems pretty easy, although stackoverflow and android dev docs were very close.

  - [ZoomableImageView](http://stackoverflow.com/a/17649895) found this on stackoverflow and edited it a little.

    - Added detection for touch to find the X and Y points on click. Little problem was to find the correct as X Y that remain the same when zooming or moving the map.

 - App is pretty buggy, especially because my thoughts weren't that clear when making it. Especially scanprint and fingerprint classes seem to pretty obsolete. And the data/event flow is horrible creating a lot of problems.

 - Better way of creating the app (might be done in coming weeks - maybe)

   - Show pos if data found for curr mac addr

   - Click / select 'mapping' to stop looping saved data and start mapping.

   - Click xy pos on map --> save xyz + fp --> scan wifis (* 1 - 5 ) -->notify user scan done --> don't start new scan yet