Digifly AIR-BT - Page 77

AIR_Manual_506a_ENG_rev_1.pdf Page 77/96
15.1.1
Digi-FLYBOX TELEMETRY DATA TYPE SELECTION
 Select the telemetry data type with the
ADVANCED SETUP \ n. 25 TELE
parameter:
 TELE=OFF: no data transmitted (default).
 TELE=CAR: GPS($GPGGA + $GPRMC) sent once per second
 TELE=FL1: GPS($GPGGA + $GPRMC) sent once per second and $PDGFTL1 sent once per second.
 TELE=FL2: GPS($GPGGA + $GPRMC) sent once per second and $PDGFTL1 sent 10 times per second.
 TELE=FL3: LK8EX1 sent 10 times per second.
 TELE=FL4 and FL5: (reserved for future implementations).
 TELE=FL6: barometer in thousandths of mb in 6 digit hex “xxxxxx[CR][LF]” sent 10 times per second.
 TELE=FL7: barometer in hundreds of mb in 5 digit hex “PSR[SP]xxxxx[CR][LF]” sent 10 times per second
 DATA COMMUNICATION SETTINGS:
115200 bauds
, no parity, 8 data bit, 1 stop bit
 The Nmea field “checksum” is composed by "*" and 2 hex digits representing the "exclusive OR”
$GPRMC,112426.000,A,4429.6564,N,01120.8056,E,0.62,15.74,271218,,,A*53<CR><LF>
Name
Example
Units
Description
Message ID
$GPRMC
RMC protocol header
UTC Time
112426.000
hhmmss.sss
Status
A
A=data valid or V=data not valid
Latitude
4429.6564
ddmm.mmmm
N/S indicator
N
N=north or S=south
Longitude
01120.8056
dddmm.mmmm
E/W indicator
E
E=east or W=west
Speed Over Ground
0.62
knots
Course Over Ground
15.74
degrees
True
Date
271218
ddmmyy
Magnetic Variation degrees
degrees
(not used)
Magnetic Variation E/W
E=east or W=west (not used)
Mode indicator A
N=data not valid, A=Autonomous, D=Differential,
E=Estimated
Checksum
*53
Nmea checksum
<CR><LF>
End of message termination
$GPGGA,112426.000,4429.6564,N,01120.8056,E,1,6,1.37,58.9,M,47.6,M,,*6F<CR><LF>
Name
Example
Units
Description
Message ID
$GPGGA
GGA protocol header
UTC Time
112426.000
hhmmss.sss
Latitude
4429.6564
ddmm.mmmm
N/S indicator
N
N=north or S=south
Longitude
01120.8056
dddmm.mmmm
E/W indicator
E
E=east or W=west
Position Fix Indicator
1
0=fix not available, 1=GPS fix, 2=Differential GPS fix
Satellites Used
6
Range 0 to 14
Number of satellites used in position fix
HDOP
1.37
Horizontal Dilution of Precision
MSL Altitude
58.9
meters
mean-sea-level Altitude (geoid)
Units of MSL Altitude
M
meters
Geoidal Separation 47.6 meters
Difference between the WGS-84 reference ellipsoid
surface and the mean-sea-level altitude (geoid)
Units of Geoidal Separation
M
meters
Age of Differential Correction
second
Null field when DGPS is not used
Differential Ref. Station ID
Null field when DGPS is not used
Checksum
*6F
Nmea checksum
<CR><LF>
End of message termination