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RoyalTek GPS Receiver REB-2000/REB-12R REV-2000 Operational Manual
10
Absolute maximum ratings
REB-2000/REB-2100
Parameter Symbol Unit Min. Value Max. Value
Supply voltage VCC_3 V -0.3 3.6
Input pin voltage V -0.3 VCC_3 + 0.3
Output pin voltage V -0.3 VCC_3 + 0.3
Output current mA ±25
RTC power VBAT V 1.5 3.6
REB-12R
Parameter Symbol Unit Min. Value Max. Value
Supply voltage VCC_5 V -0.3 6
RTC power VBAT V -0.3 3.6
Software interface
NMEA V2.2 Protocol
It is the RS-232 interface:9600 bps, 8 bit
data, 1 stop bit and no parity. It supports the
following NMEA-0183 messages:GGA, GLL,
GSA, GSV, RMC and VTG.
NMEA Output Messages
The Engine board outputs the following
messages as shown in Table 1:
Table 1 NMEA-0183 Output Messages
NMEA Record Description
GGA Global positioning system fixed data
GLL Geographic position – latitude / longitude
GSA GNSS DOP and active satellites
GSV GNSS satellites in view
RMC Recommended minimum specific GNSS data
VTG Course over ground and ground speed
GGA-Global Positioning System
Fixed Data
Table 2 contains the values of the following
example: $GPGGA, 161229.487,
3723.2475, N, 12158.3416, W, 1,
07, 1.0, 9.0, M, , , ,0000*18
Table 2 GGA Data Format
Name Example Units Description
Message ID $GPGGA GGA protocol header
UTC Position 161229.487 hhmmss.sss
Latitude 3723.2475 ddmm.mmmm
N/S Indicator N N=north or S=south
Longitude 12158.3416 dddmm.mmmm
E/W Indicator W E=east or W=west
Position Fix Indicator 1 See Table 2-1
Satellites Used 07 Range 0 to 12
HDOP 1.0 Horizontal Dilution of Precision
MSL Altitude 9.0 meters
Units M meters
Geoid Separation meters
Units M meters