GPS - Reducing NMEA Output - LocoSys GPS
Dec 26, 2024
24
Q: How can I add or reduce the NMEA Sentences outputted by the GPS?
A: Please follow the below steps:
| NMEA sentence | Software command |
|---|---|
| Factory default | $PMTK314,-1 |
| Only GLL at 1Hz | $PMTK314,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 |
| Only RMC at 1Hz | $PMTK314,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 |
| Only VTG at 1Hz | $PMTK314,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 |
| Only GGA at 1Hz | $PMTK314,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 |
| Only GSA at 1Hz | $PMTK314,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0 |
| Only GSV at 1Hz | $PMTK314,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0 |
| Only ZDA at 1Hz | $PMTK314,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0 |
| RMC, GGA, GSA at 1Hz and GSV at 0.2Hz |
$PMTK314,0,1,0,1,1,5,0,0,0,0,0,0,0,0,0,0,0,0,0 |
- Download GetacGPSCommand from the following link:
- https://gps.getac.com
- See below table to show the different commands per NMEA Sentence.
- Unzip the file downloaded
- Open Command Prompt as Administrator
- Change Directory to folder containing GetacGPSCommand.exe
- You can combine multiple sentences together to customize what you would like to have active
- Example: Enabling GLL, RMC and VTG Only
Type the following command and press enter:
For GPS at COM2 Type: GetacGPSCommand.exe 2 9600 “$PMTK314,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0”
For GPS at COM3 Type: GetacGPSCommand.exe 3 9600 “$PMTK314,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0”
If your GPS is already programmed for 4800 then replace the 9600 above with 4800 instead.
