OSKER User Manual Version 3.0
20
Changing the Timers
The length of the OSKER’s various modes cannot be altered.
Start-up mode
is fixed at 1 hour.
However, the Ir
idium and GPS intervals can be changed to suit the user’s requirements.
The GPS and Iridium interval timers can be set independently of each other, but there are several
things to keep in mind. The OSKER has a limit of 24 GPS fixes per Iridium message and will retain
a maximum of 40 unsent fixes. This puts a practical limit on the ratio of GPS fixes to Iridium
checks.
Regardless the method being used to communicate with the OSKER, timer commands are always
the same format:
$timer
SYSTEM
TIMER-MODE
INTERVAL
Typed out as:
$timer
SBD
0
2h
Command
Timer
Mode
Interval
Example 1
$timer
GPS
0
1h
Example 2
$timer
SBD
0
6h
Example 1
would change the GPS interval of Normal mode to every hour, while
Example 2
would
change the SBD message interval to 6 hours. After sending the commands from both
Example
1
and
Example 2
, the user would receive 1 message every 6 hours containing 6 GPS fixes. These
messages would be sent at approx. 00:00 UTC, 06:00 UTC, 12:00 UTC and 18:00 UTC.
