Closed jan5650 closed 1 year ago
Hi @jan5650 ,
I do not want to add the code for calculating the "Great Circle Distance" directly into the library as it takes up a significant amount of memory. However, I have added a new example showing how you can calculate the distance and course between two points. Please see the v2.2.16 release notes for more details.
Best wishes, Paul
Thank you for the example!
Can i do a last question?
In this library there is a lot of "Heading" type value. What's the different between them?
getATTheading, getHeading, getHeadingAccEst, getVehicleHeading, getMotionHeading, getHNRheading
I want the heading to where my vechile moving. Because there is no Compass, i can only compute heading by two GPS coordinate. Wich one i need to use fot the best resoult, or is there any meethod?
Thank you!
Hi @jan5650 ,
getHeading
is the one you need. It returns the 2D "heading of motion" (headMot) from the UBX-NAV-PVT message.
getVehicleHeading
is only relevant for sensors which have an internal Inertial Measurement Unit (IMU). It returns the "heading of vehicle" (vehHeading) from the UBX-NAV-PVAT message and compensates for the attitude of the vehicle.
getMotionHeading
returns the heading of motion from the UBX-NAV-PVAT message.
getHNRheading
is only relevant for sensors that support High Navigation Rate.
getATTheading
is only relevant for sensors that support UBX-NAV-ATT and have a built-in IMU.
Best wishes, Paul
Thank you very much, you helped me a lot!
I have one more question: I would like to check somehow if there is GPS fixation, because if there are a sufficient number of satellites, I only start certain calculations when I have a sufficiently accurate latitude-longitude data. As long as there are only 0-5 satellites fixation I don't even start calculations because it is so inaccurate.
So far I have related this to the number of satellites. There was a value in the NEOGps Library that gave back the number of satelites of fixation.
In this libraries how can I get the number of satellites. I wonder if there is a better way? Maybe there is another methode?
Hi @jan5650 ,
getFixType()
will tell you if you have a 3D fix (getFixType() == 3
).
getSIV()
will tell you the number of satellites used in the navigation solution. SIV means "Satellites In View" - an old term - but the number returned is actually the number of satellites used in the navigation solution.
getHorizontalAccEst()
returns the horizontal accuracy estimate in mm. If you wait until getHorizontalAccEst() < 3000
you know you have a good fix.
Best wishes, Paul
Wow! You are so on Top!
If I set:
// Turning off NMEA on both output myGNSS.setUART1Output(COM_TYPE_UBX); myGNSS.setI2COutput(COM_TYPE_UBX);
myGNSS.setMeasurementRate(200) myGNSS.setNavigationRate(1) myGNSS.saveConfiguration();
Then i get a module with 5Hz, that gives output from current latitude and longtitude in every 200ms. And then i need to call myGNSS.getLatitude(); and myGNSS.getLongitude(); in every loop after 200ms?
Am i right?
Hi Guys!
You did great job with this libraray. But sadly some function missed, that i realy want to use.
It would be great, when there will be a function, wich i can measure Distance and Bearingto between two gps coordinate.
Can you write a function for it? NEOGps libraray got it, but sadly i cannot implement it by myself
Thank you for your work!