26 DG14 and DG16 Board & Sensor Reference Manual
Use Query commands to request information from the DG16, such as the current
operating parameters, current position, or DGPS status. Query commands begin
with the command string $PASHQ.
The DG16 responds to query and set commands by issuing an acknowledgement
of a change in operating parameters or with the specific information requested
through a query.
To become familiar with the DG16 messages, send a few common commands to
the DG16 and observe the responses. In the following steps, command
messages appear as COMMAND, and response messages appear as
RESPONSE.
Chapters 5, 6, 7, and 8 contains details on these commands and responses, as well as the rest of
the commands and responses supported by the DG16.
1. Type $PASHQ,PRT and press <Enter>. This command queries the
communication setup of the port. If you have connected the PC to serial port
A, the response message is:
$PASHR,PRT,A,5
This message indicates Port A of the DG16 is using its default
communications setup 5: 9600 baud, eight data bits, no parity, and one stop
bit.
See “PRT: Serial Port Baud Rate” on page 145 for more information on this
command.
2. Type $PASHQ,STA and press <Enter>. This command queries which
satellites are locked and their signal strength at the time the command is
sent.The response message typically might display:
TIME: 18:38:31 UTC
LOCKED:03 23 16
COUNT :54 26 17
See “STA: Satellite Tracking Status” on page 159 for more information on this
command.
3. If interfacing through port A, type $PASHS,NME,POS,A,ON,1 and press
<Enter>. This commands the DG16 to return comprehensive position
information through port A at a set rate. The default rate for NME commands
is once per second. The response message output rate is 1 HZ:
$PASHR,POS,0,08,164152.90,3721.06962,N,12156.12176,W,+00003.16
,????,008.64,000.55,+000.03,01.7,01.0,01.4,00.9,GH00*20
The data string contains the position information, assuming the receiver is
tracking a sufficient number of satellites to compute a position.
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