Month: March 2017

Composants

• Une carte Arduino Nano
• Un module GPS Ublox neo-6m
• Un adaptateur microSD
• Une plaque à insertion rapide
• Des fils
• Un ordinateur avec l’environnement de développement Arduino

Schéma de câblage

 

Code

#include “SoftwareSerial.h”
#include <SD.h>
#include <SPI.h>
#include <TinyGPS++.h>

int CS_PIN = 10;

File file;

char data;

double latitude;
double longitude;
double latitudedec;
double longitudedec;

TinyGPSPlus gps;

SoftwareSerial mySerial(4, 5); // RX, TX

void setup()
{
Serial.begin(9600);
Serial.println(“uBlox Neo 6M”);
mySerial.begin(9600);
initializeSD();
}
void loop() // run over and over
{
if (mySerial.available())
{

data = mySerial.read();
// Serial.print(data);
gps.encode(data);
if (gps.location.isUpdated())
{
latitudedec = gps.location.rawLat().billionths;
longitudedec = gps.location.rawLng().billionths;
latitude = gps.location.rawLat().deg;
longitude = gps.location.rawLng().deg;

Serial.println(“——– FIX GPS ————“);
Serial.print(“LATITUDE=”); Serial.println(latitude);
Serial.print(“LONGITUDE=”); Serial.println(longitude);
File dataFile = SD.open(“datalog.txt”, FILE_WRITE);
dataFile.println(String(gps.date.value())+”;”+String(gps.time.value())+”;”+String(latitude)+”;”+String(latitudedec)+”;”+String(longitude)+”;”+String(longitudedec));

dataFile.close();
}
}
}

void initializeSD()
{
Serial.println(“Initializing SD card…”);
pinMode(CS_PIN, OUTPUT);

if (SD.begin())
{
Serial.println(“SD card is ready to use.”);
} else
{
Serial.println(“SD card initialization failed”);
return;
}
}

Ci dessous un code en Python pour générer un fichier pour Google-earth

 

#!/usr/bin/python

import math
import os,sys,glob
import os,commands,sys
import datetime,time

class KML_File:
“For creating KML files used for Google Earth”
def __init__(self, filepath):
self.filepath = filepath
“adds the kml header to a file (includes a default style)”
file = open(filepath,”w”)
file.write(
“<?xml version=\”1.0\” encoding=\”UTF-8\”?>\n”\
“<kml xmlns=\”http://www.opengis.net/kml/2.2\”>\n” \
“<Folder>\n”\
“<name></name>\n”)
file.close()

def close(self):
file = open(self.filepath,”a”)
file.write(“</Folder>\n”)
file.write(“</kml>”)
file.close()

def open_folder(self, name):
file = open(self.filepath,”a”)
file.write(
“<Folder>\n”\
” <name>” + name + “</name>\n”)
file.close()

def close_folder(self):
file = open(self.filepath,”a”)
file.write(
“</Folder>\n”)
file.close()

def add_placemarker(self, allLonAndLat, altitude = 0.0, description = ” “, name = ” “, range = 6000, tilt = 45, heading = 0):
“adds the point to a kml file”
file = open(self.filepath,”a”)
file.write(
“<Placemark>\n”\
” <description>” + description + “</description>\n”\
” <name>” + name + “</name>\n”\
” <Point>\n”\
” <coordinates>”+allLonAndLat+”</coordinates>\n”\
” </Point>\n”\
” </Placemark>\n”)
file.close()

def add_coord(self, allLonAndLat, altitude = 0.0, description = ” “, name = ” “, range = 6000, tilt = 45, heading = 0):
“adds the point to a kml file”
file = open(self.filepath,”a”)
file.write(
“<Placemark>\n”\
” <visibility>1</visibility>\n”\
” <LineString>\n”\
” <extrude>1</extrude>\n”\
” <tessellate>1</tessellate>\n”\
” <altitudeMode>absolute</altitudeMode>\n”\
” <coordinates>” + allLonAndLat + “</coordinates>\n”\
” </LineString>\n”\
” </Placemark>\n”)
file.close()
def convert(val):
eval = int(val/100.)
return eval + (float(val) – eval*100.0)/60.0
if __name__ == “__main__”:
a=KML_File(“test.kml”)

f=open(‘DATALOG.TXT’,’r’)
lines=f.readlines()
f.close()

prevlat=0
prevlon=0
n=0
for l in lines:
print l

tmp=l.split(‘;’)
londeg=tmp[4].strip()
latdeg=tmp[2].strip()
londec=tmp[5].strip()
latdec=tmp[3].strip()

lat=float(latdeg)+float(latdec)/1000000000.0
lon=float(londeg)+float(londec)/1000000000.0

if float(lon) < 5 or float(lat)< 30:
continue

if lon == prevlon and lat == prevlat:
continue

prevlat=lat
prevlon=lon
desc=tmp[0]+’ ‘+tmp[1]
tname=tmp[0]+’ ‘+tmp[1]
t=str(lon)+”,”+str(lat)
a.add_placemarker(t, altitude = 0.0, description = desc, name=str(n), range = 6000, tilt = 45, heading = 0)
n=n+1
a.close()

 

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