GLOBALSAT TR-203A - Manual (Page 75)

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7.4.2 Enter Geo-fence Alert
Geo-fence is independent from the other general tracking modes. Sending
geo-fence command to TR-203 will not stop the other general tracking
modes. TR-203 could execute general tracking mode and geo-fence at the
same time
In geo-fence mode, it requires extra to turn on GPS on.
There are two ways for turning on GPS, one is to keep GPS always on by
parameter C0, and the other is to use timer. Keep GPS always on will make
the power run up within 10 hours.
The recommended method of making GPS on is to use timer.
While using timer, you could set the report media (X4 or Y4 or Z4) as 80,
then TR-203 will turn on the GPS.
Code
word
Parameters Value Description
C0 GPS always on 1/0
Applicable to all
modes except
Sleeping and Off
mode
X0 Start time u32, in seconds
X1 End time u32, in seconds
X2 Report interval u16, in seconds
X3 Weekday mask u8, xx(hex digits)
X4 Report Media
Please refer to
2.9 Report media
Command’s format for enable Geo-fence:
GS C ,N6*Checksum!
Commands Codeword Parameters
N6 Enable Geo-fence
Example 1:
Asking TR-203 enter geo-fence alert state and make GPS