Hi I recently bought a GP-635T (GPS Receiver - GP-735 (56 Channel) - GPS-13670 - SparkFun Electronics) and installed the TinyGps library. I was wondering if any one could supply me with a simple code to test to see if it works and how to hook it up to my arduino.
Thank you!
Look page 8-9 of the datasheet http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Sensors/GPS/GP-635T-121130.pdf
If you've bought the UART version, then :
gps ------ Arduino
pin 1 - > GND ( Arduino GND)
pin 2 -> VCC (Arduino +5V )
pin 3 (Tx)-> D0 (Arduino Rx)
pin 4 (Rx)-> D1 (Arduino Tx)
and you're done
if you want to control the power from arduino, you can connect pin 6 (gps) to an digital output of arduino, and put it to LOW when you want to power off the gps.
I don't use the tinygps library, but I'm sure you'll easily find code examples 
To start with, use softserial and just echo anything the GPS sends you to the hardware serial port so you can view it in the IDE terminal.
TinyGPS comes with 3 tutorials when you install the library. In the menu, Click on File, Examples, Tiny GPS, you will find them there. The sketch called "simple_test" will get you going.
Dave
GunnerCAF:
TinyGPS comes with 3 tutorials when you install the library. In the menu, Click on File, Examples, Tiny GPS, you will find them there. The sketch called "simple_test" will get you going.Dave
Unless you are using 1.5.2 then you get more errors than I can be bothered to try to fix....
EDIT: 1.5.2 is not the problem apparently. Target board = DUE is the problem.
//#include <SoftwareSerial.h>
#include <TinyGPS.h>
/* This sample code demonstrates the normal use of a TinyGPS object.
It requires the use of SoftwareSerial, and assumes that you have a
4800-baud serial GPS device hooked up on pins 3(rx) and 4(tx).
*/
TinyGPS gps;
//SoftwareSerial nss(3, 4);
static void gpsdump(TinyGPS &gps);
static bool feedgps();
static void print_float(float val, float invalid, int len, int prec);
static void print_int(unsigned long val, unsigned long invalid, int len);
static void print_date(TinyGPS &gps);
static void print_str(const char *str, int len);
void setup()
{
Serial.begin(115200);
while(!Serial) {
}
Serial1.begin(4800);
Serial.print("Testing TinyGPS library v. ");
Serial.println(TinyGPS::library_version());
Serial.println("by Mikal Hart");
Serial.println();
Serial.print("Sizeof(gpsobject) = ");
Serial.println(sizeof(TinyGPS));
Serial.println();
Serial.println("Sats HDOP Latitude Longitude Fix Date Time Date Alt Course Speed Card Distance Course Card Chars Sentences Checksum");
Serial.println(" (deg) (deg) Age Age (m) --- from GPS ---- ---- to London ---- RX RX Fail");
Serial.println("--------------------------------------------------------------------------------------------------------------------------------------");
}
void loop()
{
bool newdata = false;
unsigned long start = millis();
// Every second we print an update
while (millis() - start < 1000)
{
if (feedgps())
newdata = true;
}
gpsdump(gps);
}
static void gpsdump(TinyGPS &gps)
{
float flat, flon;
unsigned long age, date, time, chars = 0;
unsigned short sentences = 0, failed = 0;
static const float LONDON_LAT = 51.508131, LONDON_LON = -0.128002;
print_int(gps.satellites(), TinyGPS::GPS_INVALID_SATELLITES, 5);
print_int(gps.hdop(), TinyGPS::GPS_INVALID_HDOP, 5);
gps.f_get_position(&flat, &flon, &age);
print_float(flat, TinyGPS::GPS_INVALID_F_ANGLE, 9, 5);
print_float(flon, TinyGPS::GPS_INVALID_F_ANGLE, 10, 5);
print_int(age, TinyGPS::GPS_INVALID_AGE, 5);
print_date(gps);
print_float(gps.f_altitude(), TinyGPS::GPS_INVALID_F_ALTITUDE, 8, 2);
print_float(gps.f_course(), TinyGPS::GPS_INVALID_F_ANGLE, 7, 2);
print_float(gps.f_speed_kmph(), TinyGPS::GPS_INVALID_F_SPEED, 6, 2);
print_str(gps.f_course() == TinyGPS::GPS_INVALID_F_ANGLE ? "*** " : TinyGPS::cardinal(gps.f_course()), 6);
print_int(flat == TinyGPS::GPS_INVALID_F_ANGLE ? 0UL : (unsigned long)TinyGPS::distance_between(flat, flon, LONDON_LAT, LONDON_LON) / 1000, 0xFFFFFFFF, 9);
print_float(flat == TinyGPS::GPS_INVALID_F_ANGLE ? 0.0 : TinyGPS::course_to(flat, flon, 51.508131, -0.128002), TinyGPS::GPS_INVALID_F_ANGLE, 7, 2);
print_str(flat == TinyGPS::GPS_INVALID_F_ANGLE ? "*** " : TinyGPS::cardinal(TinyGPS::course_to(flat, flon, LONDON_LAT, LONDON_LON)), 6);
gps.stats(&chars, &sentences, &failed);
print_int(chars, 0xFFFFFFFF, 6);
print_int(sentences, 0xFFFFFFFF, 10);
print_int(failed, 0xFFFFFFFF, 9);
Serial.println();
}
static void print_int(unsigned long val, unsigned long invalid, int len)
{
char sz[32];
if (val == invalid)
strcpy(sz, "*******");
else
sprintf(sz, "%ld", val);
sz[len] = 0;
for (int i=strlen(sz); i<len; ++i)
sz[i] = ' ';
if (len > 0)
sz[len-1] = ' ';
Serial.print(sz);
feedgps();
}
static void print_float(float val, float invalid, int len, int prec)
{
char sz[32];
if (val == invalid)
{
strcpy(sz, "*******");
sz[len] = 0;
if (len > 0)
sz[len-1] = ' ';
for (int i=7; i<len; ++i)
sz[i] = ' ';
Serial.print(sz);
}
else
{
Serial.print(val, prec);
int vi = abs((int)val);
int flen = prec + (val < 0.0 ? 2 : 1);
flen += vi >= 1000 ? 4 : vi >= 100 ? 3 : vi >= 10 ? 2 : 1;
for (int i=flen; i<len; ++i)
Serial.print(" ");
}
feedgps();
}
static void print_date(TinyGPS &gps)
{
int year;
byte month, day, hour, minute, second, hundredths;
unsigned long age;
gps.crack_datetime(&year, &month, &day, &hour, &minute, &second, &hundredths, &age);
if (age == TinyGPS::GPS_INVALID_AGE)
Serial.print("******* ******* ");
else
{
char sz[32];
sprintf(sz, "%02d/%02d/%02d %02d:%02d:%02d ",
month, day, year, hour, minute, second);
Serial.print(sz);
}
print_int(age, TinyGPS::GPS_INVALID_AGE, 5);
feedgps();
}
static void print_str(const char *str, int len)
{
int slen = strlen(str);
for (int i=0; i<len; ++i)
Serial.print(i<slen ? str[i] : ' ');
feedgps();
}
static bool feedgps()
{
while (Serial1.available())
{
if (gps.encode(Serial1.read()))
return true;
}
return false;
}
Code listed handles incoming GPS on pins 18 & 19 ( Serial 1, 18 TX, 19 RX) with DUE as target board.. Hopefully helps other noobs...
Now getting some of this :- 
Yeay!!
4 630 53.12169 -1.26565 731 08/14/2013 18:55:49 754 170.50 0.00 0.00 N 195 156.23 SSE 86334 580 0
4 640 53.12169 -1.26564 762 08/14/2013 18:55:50 784 170.40 0.00 0.00 N 195 156.23 SSE 86630 582 0
4 640 53.12169 -1.26564 759 08/14/2013 18:55:51 782 170.10 0.00 0.00 N 195 156.23 SSE 86926 584 0
4 640 53.12169 -1.26563 780 08/14/2013 18:55:52 802 169.80 0.00 0.00 N 195 156.23 SSE 87222 586 0
4 640 53.12169 -1.26563 797 08/14/2013 18:55:53 820 169.60 0.00 0.00 N 195 156.23 SSE 87518 588 0
4 640 53.12170 -1.26562 805 08/14/2013 18:55:54 827 169.50 0.00 0.00 N 195 156.23 SSE 87818 590 0
I must admit it does get a bit irksome that you need to spend 2/3 of your time fixing stuff BEFORE you can do what you set out to do in the first place.....
Regards,
Graham
Hello everyone!
I am using GP-635T gps module and arduino uno to get the GPS data. The NMEA sentences that I get are as follows.
$GPGGA,,,,,,0,00,99.99,,,,,,*48
$GPGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*30
$GPGSV,1,1,00*79
$GPGLL,,,,,,V,N*64
$GPTXT,01,01,02,ANTSTATUS=INIT*25
$GPRMC,,V,,,,,,,,,,N*53
$GPVTG,,,,,,,,,N*30
$GPGGA,,,,,,0,00,99.99,,,,,,*48
$GPGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*30
What are these commas??? What do they mean??? These commas should actually separate different parameters like latitude, longitude, time in NMEA sentences to the best of my knowledge. Is there something that I am missing?
Hi,
It looks like the GPS is working, but cannot find any satellites.
I have a GPS with built in antenna as well, and you need to go outside to get satellite reception.
My room is under a corrugated iron roof and only late at night can I see any satellites there, and only 3 or 4.
Which library are you using, look in the examples for the library, there should be a sketch that displays on the monitor, all the GPS data, long, lat , satellites etc, in an ordered table.
Tom... 
Get a copy of the NMEA reference manual.
Read through it.
Decide which sentences provide the data that you need.
Ignore the rest.....