GLOBALSAT TR-203A - Manual (Page 71)

70
bit2=Tuesday
bit3=Wednesday
bit4=Thursday
bit5=Friday
bit6=Saturday
format
which
specifies
applicable
day in a
week,
where bit 0
represents
Sunday,
bit1
represents
Monday,
etc.
* * End of field
Checksum The checksum value is derived
by the same method of NMEA
standard. It is calculated by
‘exclusive OR’ the 8 data bits of
each character before “*” in the
sentence, but excluding “*”. The
hexadecimal value of the most
significant and least significant
4 bits of the result are converted
to two ASCII characters (0-9,
A-F) for transmission. The most
significant character is
transmitted first.
! ! Message
delimiter
You can set up to 512 sets of geo-fence areas.
Example 1:
Set up 152
nd
~157
th
sets of geo-fence areas
GSG,130738902846156,1,0,152=(2,121752441,24756536,1217529
24,24755863),153=(2,121743236,24748254,12174845,24744844)
*78!