Software Spezifikation - Evermore Gm-R700/St-K700 Bedienungsanleitung

Software Specification
GM-R700 NMEA Protocol
The GM-R700 software is capable of supporting the following NMEA message formats
NMEA Message
Prefix
$GPGGA(1)*
$GPGLL
$GPGSA(3)*
$GPGSV(3)*
$GPRMC(1)*
$GPVTG(1)*
$GPZDA
*: (1): 1sec output 1msg , (3): 3sec output 1msg , 9600 baud rate (Standard output)
General NMEA Format
The general NMEA format consists of an ASCII string commencing with a '$' character and terminating
with a <CR><LF> sequence. NMEA standard messages commence with 'GP' then a 3-letter message
identifier. The message header is followed by a comma delimited list of fields optionally terminated with a
checksum consisting of an asterix '*' and a 2 digit hex value representing the checksum. There is no
comma preceding the checksum field. When present, the checksum is calculated as a bitwise exclusive of
the characters between the '$' and '*'. As an ASCII representation, the number of digits in each number
will vary depending on the number and precision, hence the record length will vary. Certain fields may be
omitted if they are not used, in which case the field position is reserved using commas to ensure correct
interpretation of subsequent fields.
The tables below indicate the maximum and minimum widths of the fields to allow for buffer size
allocation.
EverMore Technology Inc.
2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C.
Format
GPS fix data.
Geographic position Latitude / Longitude.
GNSS DOP and actives satellites
Satellites in view.
Recommended minimum specific GNSS data.
Velocity and track over ground.
Date and time.
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GM-R700 Bedienungsanleitung
Direction
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