Name: Geofence
Author: matias001

Datafield app that provides geofencing functionality.

After setting mode of operation, datafield will notify about going outside the geofence:
- notifications with sound and display color change
- notifications are triggered during activity only
- time of notifications and interval between notifications can be adjusted

Modes of operation:
1. Radius mode
- set center point coordinates and radius in meters
- datafield shows current location and distance to center

2. Polygon mode
- 3 or 4 points supported initially. 0.0 values in last point coordinates makes it discarded
- due to limited user input capabilities of datafield app user must guarantee correctness of settings
- only simple triangle or quadrangle geofence area supported

NEW: up to 6 points  supported, unused points should be set 0.0  0.0 .

Trial version allows 5 mins of geofencing.

Settings:
Settings accessed through Garmin Express or Garmin Connect mobile app configure:
- mode selection
- input geofence points / radius
- configurable notification time after going outside and intervals
- license string

How it works:
1. Add Datafield to an app
2. Set datafield settings through Garmin connect app from smartphone or Garmin Express from PC
* Set notification time in seconds - time of sound when going outside the geofence
* Set notification interval in seconds - interval between notifications
* Select Geofence mode: Radius / Polygon
* Set center point 
* set from 3 to 6 points ( leave unused points set to 0.0  and 0.0 )
3. Unique ID - is a device number 
4. Set license key if you have one
5. Run app with datafield, when going outside the geofence, datafield should trigger notifications until going back inside the geofence.
