Hi,
I am using the QLM290P module and am trying to read the RAW data so that I can use it for PPK processing, however I am having trouble doing so. Currently, I’ve tried commands from the protocol specifications in QGNSS V2.2 and straight to the serial terminal. I am new to using this so any help is appreciated!
Once logged the raw data (RTCM), need to convert them into rinex_format for submit to a PPK solution…
Rtklib suite can do this.
How do I log the RAW data though? Whenever I try to read, all I am getting is NMEA output
Ok, having an embedded board you need to locate the specific com port of the gnss module (LG290P).In Qgnss try to send commands and get a response e.g.
$PQTMVERNO*58
note: the version must be at least v5
once get a response the commands are:
$PQTMCFGRTCM,W,7,0,15,07,06,2,30*36
$PQTMSAVEPAR*5A
$PQTMSRR*4B
this command enables rtcm msm7, if the module do not output, try with
$PQTMRESTOREPAR*13
then
$PQTMGNSSSTOP*09
$PQTMCFGPROT,W,1,1,00000005,00000005*38
$PQTMCFGPROT,W,1,2,00000005,00000005*3B
$PQTMCFGPROT,W,1,3,00000005,00000005*3A
$PQTMCFGRTCM,W,7,0,15,07,06,2,30*36
$PQTMCFGMSGRATE,W,RTCM3-1005,0*58
$PQTMCFGMSGRATE,W,RTCM3-1033,0*5D
$PQTMCFGMSGRATE,W,RTCM3-1019,1*54
$PQTMCFGMSGRATE,W,RTCM3-1020,1*5E
$PQTMCFGMSGRATE,W,RTCM3-1041,1*59
$PQTMCFGMSGRATE,W,RTCM3-1042,1*5A
$PQTMCFGMSGRATE,W,RTCM3-1044,1*5C
$PQTMCFGMSGRATE,W,RTCM3-1046,1*5E
$PQTMCFGMSGRATE,W,RTCM3-107X,1,0*2F
$PQTMCFGMSGRATE,W,RTCM3-108X,1,0*20
$PQTMCFGMSGRATE,W,RTCM3-109X,1,0*21
$PQTMCFGMSGRATE,W,RTCM3-111X,1,0*28
$PQTMCFGMSGRATE,W,RTCM3-112X,1,0*2B
$PQTMCFGMSGRATE,W,RTCM3-113X,1,0*2A
$PQTMSAVEPAR*5A
$PQTMSRR*4B
and if want to disable nmea messages ecept GGA
$PQTMCFGMSGRATE,W,GSV,0*08
$PQTMCFGMSGRATE,W,GSA,0*1F
$PQTMCFGMSGRATE,W,VTG,0*0F
$PQTMCFGMSGRATE,W,GLL,0*0D
$PQTMCFGMSGRATE,W,GBS,0*1C
$PQTMCFGMSGRATE,W,GNS,0*10
$PQTMCFGMSGRATE,W,ZDA,0*15
$PQTMCFGMSGRATE,W,GST,0*0A
(without savepar)
now use a logger and for parse can use strsvr of rtklib_suite.
Regards