Haicom HI-203E, Use Manual, Page: 13 / 16

SECTION 4
SOFTWARE INTERFACE
This section describes the details of the serial port commands through
which the HI-203E is controlled and monitored. The serial port
commands allow users to set the receiver parameters, configure output
message type, and retrieve status information. The baud rate and
protocol of the host COM port must match the baud rate and protocol of
the GPS receiver serial port for commands and data to be successfully
transmitted and received. The default receiver protocol is 4800baud, 8
data bits, 1 stop bit, and none parity.
4.1 NMEA OUTPUT MESSAGE SPECIFICATION
The HI-203E supports NMEA-0183 output format as defined by the
National Marine Electronics Association (http://www.nmea.org). The
currently supported NMEA messages for GPS applications are:
GGA
GLL
GSA
GSV
RMC
VTG
4.1.1 NMEA Checksum Calculation
The optional NMEA checksum can be enabled or disabled when setting
up the NMEA protocol. The checksum consists of a "*" and two
hexidecimal digits derived by exclusive-OR of all the characters
between, but not inlcuding, the "$" and "*" characters.
Global Positioning System Fix Data
Geographic Position Latitude / Longitude
GNSS DOP and Active Satellites
GNSS Satellites in View
Recommended Minimum Specific GNSS Data
Course Over Ground and Ground Speed
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