Rover-X User Manual Version 1.0
21
Watch Circle
The watch circle functionality allows users to monitor the position of their mooring by receiving
alarm messages when it exits the circle. This feature aids in the recovery of moorings that could
break free from their planned position.
Setting the Watch Circle
The watch circle parameters can be set (or edited if already set) by using the
$setcircle
command:
$setcircle
Latitude
Longitude
Radius
The minimum radius is 50 meters, while the maximum is 15000 meters.
Example:
$setcircle
47.56989
-53.55682
100
a)
$setcircle
is the command
b)
Latitude is set to
47.56989
degrees
c)
Longitude is set to
-53.55682
degrees
d)
Radius is set to
100
meters
Upon implementing the watch circle, the Rover-X will return a
the configuration.
Recognition of a watch circle exit is tied to the GPS interval of the
device. Once a GPS position is
logged that shows the device is outside the circle, the device immediately transitions to Watch
Circle Alarm mode
(Timer 5)
and transmits according to the set timer intervals of that mode
until the unit re-enters the watch circle, the radius is expanded or edited with
$setcircle
, or the
watch circle is disabled with
$clearcircle
.
Additional Watch Circle Information
•
The watch circle
’s details
are saved between power cycles and are transmitted at start-
up. If no watch circle is set, this message simply states the watch circle is disabled.
•
The settings of the watch circle can be queried with the
$getcircle
command
•
The watch circle can be cleared, and thus disabled with the
$clearcircle
command
•
T
he Watch Circle’s radius
can be adjusted without changing the position of the center by
setting the latitude and longitude parameters to
0
, followed by the new radius.
