Arduino gps speedometer

Forum 2005-2010 (read only) Hardware Development
1

Hey guys,
Im trying to build a speedometer using 2 20*4 lcd's and a gps receiving module 5v ttl, 51 channel.....Please tell me how to extract only the information regarding speed from whole bunch of info ,the gps gives out........and to filter that info to get only speed which i have to print on to my lcd...??

2

http://arduiniana.org/libraries/tinygps/

I suggest working with your LCD first, getting to understand how to print to it and such if you haven't already. There are quite a few examples in the Arduino IDE.

But if you know how to write code for the LCD, using TinyGPS to extract the speed should be fairly easy.

3

Can someone please show me a sample code where u can print only the speed of the object using gps ignoring all other info.....!!

4

Seriously, Captain Obvious wasn't obvious enough for you?

He pointed you at TinyGPS. Which if you scroll down a wee bit reveals:

// returns speed in 100ths of a knot
speed = gps.speed();

So, you don't want speed in knots? OK, scroll a little further down.

float fmph = gps.f_speed_mph(); // speed in miles/hr

You one of those silly people who don't use archaic measurements based on body parts? Fine,

float fmps = gps.f_speed_mps(); // speed in m/sec
float fkmph = gps.f_speed_kmph(); // speed in km/hr

I also recommend you read the section on usage on that page so you know to include the TinyGPS files:

#include "TinyGPS.h"
TinyGPS gps;