Rover User Manual Version 3.0
24
Changing the Timers
Iridium and GPS intervals can be changed to suit the user’s requirements through the use of the
$timer command:
$timer
SYSTEM
TIMER-MODE
INTERVAL
The GPS and Iridium interval timers can be set independently of each other, but there are several
things to keep in mind. The Rover has by default a limit of 12 GPS fixes per Iridium message and
will retain a maximum of 24 unsent fixes (all fixes are saved in internal flash memory). This puts
a practical limit on the ratio of GPS fixes to Iridium checks.
Regardless the method being used to communicate with the Rover, timer commands are always
the same format:
Example 1
$timer
SBD
2
10m
Changes the SBD interval of Alarm Mode to 10 minutes
Example 2
$timer
SBD
0
1d
Changes the SBD interval of Normal Mode to 1 day
Example 3
$timer
GPS
0
6h
Changes the GPS interval of Normal Mode to 6 hours
After combining the setup of both Example 2 and Example 3, the user would receive 1 message
every day containing 4 GPS fixes. These messages would be sent at approx. 00:00 UTC.
As with all other settings aside from watch circle centres, all timers are retained through resets
and will be employed at the next power-up.
