I've ordered this Tiny GPS module of
eBay and as usual by the time it arrives in Namibia (~ 3 months later) I can't remember why I got it in the first place. So I decided to hooked it up to my Arduino Uno.
After Googling I found a
DFRobot Wiki with some sample code, wiring, and links to the required library.
I've modifying the code a bit and was able to retrieve information from the GPS, but the format was decimal degrees and I would like to get the DMS format. This was the most tricky part, but I finally got it right, or at least I think so.
I've also added some additional readings just for fun...
The code
#include
<TinyGPS.h>
#include
<Wire.h>
#include
<LiquidCrystal.h>
TinyGPS
gps;
LiquidCrystal
lcd(8, 9, 4, 5, 6, 7); //LCD
driver pins
int led =
13;
long lat,
lon;
unsigned
long fix_age, time, date, speed, course;
unsigned
long chars;
unsigned
short sentences, failed_checksum;
int year;
byte
month, day, hour, minute, second, hundredths;
int
Timezone = 2; //GMT
+2:00
long alt;
int DEG;
int MIN;
float
SEC;
long
LATT, LONG;
char N_S,
E_W;
int
counter;
void
LAT(){ //Latitude
state
LATT=lat;
if (LATT < 0)
{
N_S = 'S';
LATT = -LATT;
}
else
{
N_S = 'N';
}
DEG = (int)(LATT/1000000); //Get the Degrees
LATT = LATT - (DEG*1000000); //Remove the degrees from the
calculation
MIN = LATT*60/1000000; //Convert to minutes
LATT = LATT*60 - (MIN*1000000); //Remove the minutes from the
calculation
SEC = float(LATT)*60/1000000;
lcd.setCursor(0,0); // set the LCD cursor position
lcd.print(N_S);
lcd.print(DEG);
lcd.write(0xDF);
lcd.print(MIN);
lcd.print("'");
lcd.print(SEC);
lcd.write(0x22);
lcd.print(" ");
}
void
LON(){ //Longitude
state
LONG=lon;
if (LONG < 0)
{
E_W = 'W';
LONG = -LONG;
}
else
{
E_W = 'E';
}
DEG = (int)(LONG/1000000); //Get the Degrees
LONG = LONG - (DEG*1000000); //Remove the degrees from the
calculation
MIN = LONG*60/1000000; //Convert to minutes
LONG = LONG*60 - (MIN*1000000); //Remove the minutes from the
calculation
SEC = float(LONG)*60/1000000;
lcd.setCursor(0,1); // set the LCD cursor position
lcd.print(E_W);
lcd.print(DEG);
lcd.write(0xDF);
lcd.print(MIN);
lcd.print("'");
lcd.print(SEC);
lcd.write(0x22);
lcd.print(" ");
}
void
setup()
{
Serial.begin(9600); //Set the GPS baud rate.
pinMode(led, OUTPUT);
lcd.begin(16, 2); // start the library
lcd.setCursor(0,0); // set the LCD cursor position
lcd.print("Nico's GPS"); // print a simple message on the LCD
delay(2000);
counter = 0;
}
void
Date_Time() {
lcd.setCursor(0,0); // set the LCD cursor position
lcd.print(year);
lcd.print("-");
lcd.print(month);
lcd.print("-");
lcd.print(day);
lcd.print(" ");
lcd.setCursor(0,1); // set the LCD cursor position
lcd.print(hour + Timezone);
lcd.print(":");
lcd.print(minute);
lcd.print(":");
lcd.print(second);
lcd.print(" ");
}
void
Altitude(){
lcd.setCursor(0,0); // set the LCD cursor position
lcd.print("Alt: ");
lcd.print(gps.f_altitude());
lcd.print(" m ");
}
void
Satellites(){
lcd.setCursor(0,1); // set the LCD cursor position
lcd.print("Satellites: ");
lcd.print(gps.satellites());
lcd.print(" ");
}
void
Speed(){
lcd.setCursor(0,0); // set the LCD cursor position
lcd.print("KM/h: ");
lcd.print(gps.f_speed_kmph());
lcd.print(" ");
}
void
Course(){
lcd.setCursor(0,1); // set the LCD cursor position
lcd.print("Course: ");
lcd.print(gps.f_course());
lcd.write(0xDF);
lcd.print(" ");
}
void
loop()
{
while (Serial.available())
{
digitalWrite(led, HIGH);
int c = Serial.read(); // Read the GPS data
if (gps.encode(c)) // Check the GPS data
{
// process new gps info here
}
}
digitalWrite(led, LOW);
gps.get_position(&lat, &lon,
&fix_age); // retrieves +/-
lat/long in 100000ths of a degree
gps.get_datetime(&date, &time,
&fix_age); // time in hhmmsscc,
date in ddmmyy
gps.crack_datetime(&year, &month,
&day, &hour, &minute, &second, &hundredths,
&fix_age);
counter++;
if (counter >= 0 && counter
<=1000) {
LAT();
LON();
}
if (counter >= 1001 && counter
<=2000) {
Date_Time();
}
if (counter >= 2001 && counter
<=3000) {
Altitude();
Satellites();
}
if (counter >= 3001 && counter
<=4000) {
Speed();
Course();
}
if (counter > 4000) {
counter = 0;
}
}
With the data I can now collect from the GPS module, I decided to search for a SD Card module to create a log file with entries every 5 seconds or so. I found and ordered the module again from eBay.
In the meanwhile I decided to replace the Arduino Uno with one of those cheap eBay Arduino Nanos.
After struggling for a while to get the cheap clone Arduino Nano to work I found this great posting on
kiguino.moos.io explaining the issue and how to fix it.
I also had to add a symbolic link to get it working on my Mac:
sudo ln
-s/dev/cu.usbmodem411 /dev/tty.wchusbserial1410
So what's next
Once the logger arrives I will add that to the Arduino Nano and if I'm brave enough I will attempt to get it all working on a PIC Micro Controller.
