Another option:
x = 23.123456
x = x * 1000, now x = 23123.456
x = int x, now x = 12123
x = x/10, now x = 12.123
See it that helps. Maybe it's too simplistic an approach, makes sense in my mind anyway.
Data-wise, maybe you lose too much position detail that way, and it will put you 1000 feet from where you want to be or something.
i was trying how to get the average of 10 samples of the GPS reading but i think it i dont know how to convert it into code can you make out a code for me that takes 10 samples of GPS reading and compute me the direction
??
float gps_data = 0;
for (int x = 0; x<10; x=x+1){
gps_data = gps_data + new_reading_value;
}
float gps_avg = gps_data/10;
can i get a good heading using this code with the GPS
I was providing the example, you'll have to take the approach and adapt it to your specific code.
You may have to average in both Lat, Long, and Altitude for example.
I would think you'd need to perform the averaging here:
if (myGPS.decode(mygps.read())) {
// if so, set status led on
digitalWrite(13, HIGH);
// calculate direction to destination, relative to my own direction of movement
float lat = myGPS.gprmc_latitude();
float longi = myGPS.gprmc_longitude();
so make that section do 10 readings with the averaging as discussed:
float lat = 0;
float longi = 0;
for (int x = 0; x<10; x=x+1){
if (myGPS.decode(mygps.read())) {
// if so, set status led on
digitalWrite(13, HIGH);
// calculate direction to destination, relative to my own direction of movement
lat = lat+ myGPS.gprmc_latitude();
longi = longi + myGPS.gprmc_longitude();
}
lat = lat/10;
longi = longi/10;
}
// continue to the display code
Is this ok
#include <math.h>
#include <nmea.h>
#include <LiquidCrystal.h>
#include <NewSoftSerial.h>
NewSoftSerial mygps(7, 8);
NMEA myGPS(GPRMC);
LiquidCrystal myLCD = LiquidCrystal(12, 11, 5, 4, 3, 2);
float dest_latitude = 25.37106;
float dest_longitude = 68.355681;
void setup() {
myLCD.begin(16,2);
mygps.begin(4800);
pinMode(13, OUTPUT); // diagnostic led on Wiring-board
pinMode(6, OUTPUT);
myLCD.clear();
myLCD.home();
myLCD.print(":) :)");
delay(1000);
}
void loop() {
if (mygps.available() > 0 ) {
float lat = 0;
float longi = 0;
for (int x = 0; x<10; x=x+1){
if (myGPS.decode(mygps.read())) {
// if so, set status led on
digitalWrite(13, HIGH);
// calculate direction to destination, relative to my own direction of movement
lat = lat+ myGPS.gprmc_latitude();
longi = longi + myGPS.gprmc_longitude();
}
lat = lat/10;
longi = longi/10;
}
// continue to the display code
myLCD.setCursor(0,0);
myLCD.print("D:");
float d=(round(myGPS.gprmc_distance_to(dest_latitude, dest_longitude, MTR)));
myLCD.print(d);
myLCD.print("m");
float mydir=0;
for (int y=0;y<10;y++)
{
if (myGPS.gprmc_status() == 'A') {
// calculate relative direction to destination
d = myGPS.gprmc_course_to(dest_latitude, dest_longitude) - myGPS.gprmc_course();
mydir=mydir+d;
if (d < 0) {
d += 360;
}
if (d > 180) {
d -= 360;
}
}
mydir=mydir/10;
myLCD.setCursor(1,1);
myLCD.print(mydir);
if(d<5)
{
digitalWrite(5,HIGH);
}
else {
digitalWrite(5,LOW);
}
if(d>-5){
digitalWrite(13,HIGH);
}
else {
digitalWrite(13,LOW);
}
}
}
}
I don't see it doing anything with the new averaged values that are calculated.
it still does not gives me good direction why?
it still does not gives me good direction why?
Grow up. Learn to use capital letters and punctuation. Learn to read all replies before blurting "it doesn't work".
Do you have any idea how much, distance-wise, the variation of actual location that you are getting corresponds to?
The other reason your GPS says you are moving when you are not is so you can't "roll your own cruise missile"!
A military GPS won't do that.
Your smart phone gets better accuracy by using cell tower triangulation.
That falls down here 'coz I only get 1 cell tower.
If you want your trundle bot to move between waypoints you will have to live with a few metres of error.
The other thing I'm doing is using a digital compass, well 2 actually, one tilt compensated, one not.
The 2 digital compass' always agree on the heading, the GPS doesn't.
"A military GPS won't do that" as much.