NMEA Manual based on MediaTek chipset - Manual
FTX-HW-13002-A
Preliminary
Page 21 of 39
Command number:
313
DataField:
Enabled: Enable or disable
‘0’ = Disable
‘1’ = Enable
Example:
$PMTK313,1*2E<CR><LF>
Reply:
$PMTK001,313,3*31<CR><LF>
SBAS can be used only with 1Hz (Default) output rate!
2.26
PMTK314 API SET NMEA OUTPUT
Command purpose:
Set NMEA sentence output frequencies.
Command number:
314
DataField:
There are totally 19 data fields that present output frequencies for the 19 supported NMEA sentences
individually.
Supported NMEA Sentences
0 NMEA_SEN_GLL, // GPGLL interval - Geographic Position - Latitude longitude
1 NMEA_SEN_RMC, // GPRMC interval - Recomended Minimum Specific GNSS Sentence
2 NMEA_SEN_VTG, // GPVTG interval - Course Over Ground and Ground Speed
3 NMEA_SEN_GGA, // GPGGA interval - GPS Fix Data
4 NMEA_SEN_GSA, // GPGSA interval - GNSS DOPS and Active Satellites
5 NMEA_SEN_GSV, // GPGSV interval - GNSS Satellites in View
6 NMEA_SEN_GRS, // GPGRS interval - GNSS Range Residuals
(not supported on fw 150M)
7 NMEA_SEN_GST, // GPGST interval - GNSS Pseudorange Erros Statistics
(not supported on fw
150M)
13 NMEA_SEN_MALM, // PMTKALM interval - GPS almanac information
(not supported, all versions)
14 NMEA_SEN_MEPH, // PMTKEPH interval - GPS ephmeris information
(not supported, all versions)
15 NMEA_SEN_MDGP, // PMTKDGP interval - GPS differential correction information
(not supported,
all versions)
16 NMEA_SEN_MDBG, // PMTKDBG interval – MTK debug information
(not supported, all versions)
17 NMEA_SEN_ZDA, // GPZDA interval – Time & Date
18 NMEA_SEN_MCHN, // PMTKCHN interval – GPS channel status
Supported Frequency Setting
0 - Disabled or not supported sentence
1 - Output once every one position fix
2 - Output once every two position fixes
3 - Output once every three position fixes
4 - Output once every four position fixes
5 - Output once every five position fixes
Example:
