NMEA Manual based on MediaTek chipset - Manual
FTX-HW-13002-A
Preliminary
Page 22 of 39
$PMTK314,1,1,1,1,1,5,1,1,1,1,1,1,0,1,1,1,1,1,1*2C<CR><LF>
This command set GLL output frequency to be outputting once every 1 position fix, and RMC to be outputting
once every 1 position fix, and so on.
Reply:
$PMTK001,314,3*36<CR><LF>
You can also restore the system default setting via issue:
$PMTK314,-1*04<CR><LF>
Messages ALM, EPH, DGB and DBG are not currently supported.
Messages GRS, GST, ZDA and MCHN are not supported on 150M firmware.
2.27
PMTK330 API SET DATUM
Command purpose:
Set default datum.
Command number:
330
DataField:
PMTK330,Datum
Datum: 0: WGS84
1: TOKYO-M
2: TOKYO-A
Support 219 different datums. The total datums list in
Appendix A
.
Example:
$PMTK330,0*2E<CR><LF>
Reply:
$PMTK001,330,3*30<CR><LF>
2.28
PMTK331 API SET DATUM ADVANCE
Command purpose:
Set user defined datum.
Command number:
331
DataField:
PMTK331,majA,ecc,dX,dY,dZ
majA: User defined datum semi-major axis [m]
ecc: User defined datumeccentric [m]
dX: User defined datum to WGS84 X axis offset [m]
dY: User defined datum to WGS84 X axis offset [m]
dZ: User defined datum to WGS84 X axis offset [m]
Example:
$PMTK331, 6377397.155, 299.1528128, -148.0, 507.0,685.0*16<CR><LF>
Reply:
$PMTK001,331,3*31<CR><LF>
