SeaGauge-Remote G2
User’s Manual
version 031119
Brookings, OR 97415
51
www.chetcodigital.com
Serial Port Protocols
The serial port interface of the SeaGauge-Remote unit can be used for real-time status and
reprogramming. The status information is sent in either NMEA 0183 format using the
$IIXDR sentence format or NMEA 2000 PGNs. Custom NMEA control sentences are
used to control the unit via the serial port interface.
To access the serial port information
–
connect the supplied cable to computer RS232 port.
Set the baud rate of the computer interface to match the baud rate of the unit (57600). Use
the standard 8 bits, no parity, and 1 stop bit (8-N-1). Start a serial interface program such as
HyperTerminal with these settings then power up the unit. If the connection is correct you
will status message from the unit
–
SeaGauge-Remote Version 1.02. This indicates the settings are correct.
NMEA 0183 support custom message formats for command and control of propriety
equipment. SeaGauge-Remote uses the sentence structures:
$PCDIC,X - for control were X is the control command
•
N
= Next menu. Same as pressing the top button
•
S
= Set function. Same as pressing the bottom button
•
G
= Start dumping NMEA $IIXDR sentences in real-time at two updates per
second
•
P
= Initiate programming the unit
•
B
= Initialize the Bluetooth module.
$PCDIS,YYYYY
–
for status where YYYYY is the returned status information
•
$PCDIS,SEAGAUGE-REMOTE,0001.100,,*79 = Model Name and Firmware
revision
Instrumentation data is returned using the standard NMEA $IIXDR sentence structure:
$IIXDR,X,DATA,U,LABEL,CHECKSUM
•
X
= sensor type (G,P,C,..)
•
DATA
= 8 character sensor data value returned from the lookup table
•
U
= unit of measurement specifier
•
LABEL
= 8 character sensor label and a 1 character number representing the
channel
•
CHECKSUM
= NEMA check sum calculation on the string
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