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| == Introduction ==
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| Geofencing is a key feature in GPS tracking. It allows users to define virtual boundaries on a map. When a vehicle or asset enters or exits these boundaries, the system can trigger alerts or actions.
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| == How Geofence Works ==
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| * A geofence can be circular or polygonal.
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| * The GPS tracker regularly checks its position via satellites.
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| * The system compares the location against the defined geofence.
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| * When the boundary is crossed, it logs or notifies the event.
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| == Getting Coordinates from Google Maps ==
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| # Open [https://maps.google.com Google Maps].
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| # Search for your location (e.g., office, school).
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| # Right-click the spot and select '''"What’s here?"'''
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| # Copy the decimal coordinates shown (e.g., 10.0556255, 76.3544891).
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| Use these coordinates:
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| * As the center for circular geofences.
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| * As corners for polygon geofences (3–6 recommended points).
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|
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| == Geofence Command Format ==
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| * '''Status''': 1 = Enable, 0 = Disable
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| * '''Geofence ID''': Unique number (e.g., 1313)
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| * '''Alert Type''': 1 = Entry, 2 = Exit, 3 = Both
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| * '''Shape''': 0 = Circle, 1 = Polygon
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| * '''Latitude/Longitude''': Decimal format
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| * '''Radius''': In meters (only for circular type)
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| * '''#''': Parameter separator
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| * '''&''': Required at end of polygon commands
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|
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| == Circular Geofence Example ==
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| Objective: Create a 1000-meter circular geofence at 10.0556255, 76.3544891
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|
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| <pre>
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| SET CUGF:1-1313-3-0#10.0556255-76.3544891#1000
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| </pre>
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| Response:
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| <pre>
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| IMEI: 862942074896044
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| Command: SET CUGF:1-1313-3-0#10.0556255-76.3544891#1000
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| Response: Error : 0
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| </pre>
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| == Polygon Geofence Example ==
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| Objective: Create a polygon geofence with 4 corner points.
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| Coordinates:
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| * 10.0535097, 76.334262
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| * 10.0504267, 76.3328855
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| * 10.0474386, 76.3439598
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| * 10.0503084, 76.3437023
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| * (Repeat the first point to close the shape)
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| Command:
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| <pre>
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| SET CUGF:1-1777-3-1#10.0535097-76.334262#10.0504267-76.3328855#10.0474386-76.3439598#10.0503084-76.3437023#10.0535097-76.334262&
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| </pre>
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| == Save the Configuration ==
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| After setting geofences, save to memory:
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| <pre>
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| SET TSMR:2
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| </pre>
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|
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| == Check Configured Geofences ==
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| To view saved geofences:
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| <pre>
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| GET CUGF
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| </pre>
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|
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| == Final Checklist ==
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| * Confirm GPS fix is available on device.
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| * Move the vehicle inside and outside geofence area.
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| * Verify alerts or logs are triggered correctly.
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