Interfacing a GPS to Arduino using NewSoftSerial

Forum 2005-2010 (read only) Hardware Interfacing
1

Hi,

I'm having a trouble using NewSoftSerial to read data from a GPS. I'm using a very basic sketch (attached), but I just get strings of garbage on the screen

I can read the GPS data using hyperterminal without problems, it auto-detects the connections settings as 4800 baud, 8 bit, no parity. The data displayed by hyperterminal is fine, so I know the GPS is working.

Any suggestions appreciated.

Thanks

Mike

#include <NewSoftSerial.h>
NewSoftSerial mySerial = NewSoftSerial(2, 3);
#define BUFFSIZ 90 // plenty big
char buffer[BUFFSIZ];
char buffidx;
void setup()
{

  • Serial.begin(4800);*
  • mySerial.begin(4800);*
  • Serial.println("\n\rNewSoftSerial + GPS test");*
    }

void loop()
{

  • Serial.print("\n\rread: ");*
  • readline();*
    }
    void readline(void) {
  • char c;*
  • buffidx = 0; // start at begninning*
  • while (1) {*
  • c=mySerial.read();*
  • if (c == -1)*
  • continue;*
  • Serial.print(c);*
  • if (c == '\n')*
  • continue;*
  • if ((buffidx == BUFFSIZ-1) || (c == '\r')) {*
  • return;*
  • }*
  • buffidx++;*
  • }*
    }
2

Another suggestion: try using the TinyGPS object -- relieves you of a lot of work.
http://arduiniana.org/libraries/tinygps

-Rusty-