NMEA ZDA Time Code
This string is in accordance with NMEA-0183 standard in content, but is transmitted at 9600bps by default.
Transmission is once per second. The leading edge of the "start" bit of the "$" character is exactly on the second.
Default settings: 9600bps, 8-bit ASCII, no parity.
Definition:
$GPZDA,hhmmss.00,dd,MM,yyyy,s,xx,YY*CC<CR><LF>
Table 12-15. NMEA ZDA Time Code Content Specification
Placeholder Content
$GPZDA
ASCII "$GPZDA"
,
ASCII "," (comma)
hh
UTC hour: "00"-"23" ASCII
mm
UTC minute: "00"-"59" ASCII
ss
UTC second: "00"-"59" ASCII
.00
ASCII ".00" (fullstop zero zero)
dd
UTC day of month: "01"-"31" ASCII
MM
UTC month: "01"-"12", "01" = January ASCII
yyyy
UTC year, 4 digits
s
Local time zone offset sign (positive means local time leads UTC)
xx
Local time zone offset from UTC in hours
YY
Local time zone offset from UTC in minutes
*
ASCII "*" (asterisk)
CC
2-digit hex representation of the result of XORing the 8 data bits of each character between, but not
including, the "$" and "*". ("00"-"FF")
<CR>
Carriage return (HEX 0D)
<LF>
Line feed (HEX 0A)
Example:
$GPZDA,123456.00,23,04,2010,+,12,00* <CR><LF>
UTC time 12:34:56, UTC date 23 April 2010, local time offset is +12:00
NMEA RMC Time Code
This string is compatible with and defined by the NMEA-0183 standard.
Transmission is once every second. The leading edge of the "start" bit of the "$" character is exactly on the second.
Default settings: 9600bps, 8-bit ASCII, no parity.
Definition:
$GPRMC,hhmmss.00,a,tttt.tttt,N,ggggg.gggg,W,0.0,0.0,DDMMYY,0.0,E*CC<CR><LF>
Appendix A: Specifications
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2022 Microchip Technology Inc.
and its subsidiaries
Manual
DS00004572A-page 249
