Trimble Outdoors SK8 - Manual (Page 151)

Lassen-SK8 Embedded GPS Module C-5
Trimble ASCII Interface Protocol (TAIP)
C.3 Time and Distance Reporting
The “D message qualifier allows you to specify a minimum distance traveled as well as a
minimum and maximum time interval for the next report. Units that are stationed at a
fixed location can be programmed to report only when the unit moves “off station or after
a certain elapsed time since last report, but no more often than the specified minimum time
interval.
The message format used with the D qualifier is shown below:
>DAABBBBCCCCEEEEFFFF[;ID=GGGG][;*HH]<
Table C-4. Time and Distance Reporting Message Format Qualifiers
*
Note – If BBBB = 0, then the message output is disabled. If FFFF = 0, maximum time
feature is disabled (the unit will only report if current position is greater than or equal to the
delta distance specified in EEEE).
Example:
When the message: >DPV0030000505000900;ID=0105< is sent to the GPS receiver, it
specifies that vehicle number 105 (GGGG = 0105) is to report the Position Velocity
message (AA = PV) whenever its current position differs from the previously reported
position by at least 500 meters (EEEE = 0500), but no more often than every 30 seconds
(BBBB = 0030) or less often than every 15 minutes (FFFF = 0900 seconds). The
minimum and maximum time-out reports are to be issued with a 5 second offset (CCCC =
0005) from the top of the hour. The optional checksum was not used in this example. The
square brackets, [...], shown in the format description above are used to indicate optional
data. The brackets themselves are never included in the actual TAIP message string.
ID Meaning
> start of message delimiter
D the Distance message qualifier
AA message to report (i.e. PV means Position Velocity message)
BBBB minimum time (seconds) interval between reports (Tinterval)
CCCC report epoch (number of seconds from top of the hour)
EEEE delta distance (meters) from last reported distance
FFFF maximum time (seconds) interval between reports (Tmax)
GGGG optional vehicle identification number (user selected)
HH optional checksum
< End of message delimiter