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[Reply #30 on:]

Well, your debug trace doesn't give any indication of how long it took (hint), but I'd probably go for continuous (1Hz) updates from the GPS, and do a rolling average of lat/long.

it still does not work good from my side

I'm sorry to hear that.

[Reply #31 on:]

i am just working on the ranges but not able to define it properly so i need help in defining the ranges if you can do me a favour

[Reply #32 on:]

You can't define the range; the range is simply the distance from where you are to where you want to be, and will obviously vary.

[Reply #33 on:]

only worried about the direction

if ( finaldir < 20 && finaldir > 340 )//if the final direction is +20 or -20 it should go straight
          {
            Serial.println("Straight");
            myLCD.print ("Go Straight");
            //motorForward();//car Forward
            //steering('C');//Steering Centered
          } 
          if(finaldir >180 && finaldir < 339)
          {
            Serial.print("Straight");
            Serial.println("Left");

            myLCD.print ("L");
            //motorForward();
            //steering('L');
          }
          if(finaldir > 20 && finaldir < 179)
          {
            Serial.print("Straight");
            Serial.println("Right");

            myLCD.print ("R");
            //motorForward();
            //steering('R');
          }

[Reply #34 on:]

Code:

if ( finaldir < 20 && finaldir > 340 )/

Doesn't seem very likely, does it?

[Reply #35 on:]

Code:

if ( finaldir < 20 && finaldir > 340 )/

Doesn't seem very likely, does it?

Also you have some gaps where if the value is 179 through 180, 339 through 340, or exactly 20 (as examples) there's no result as you've not tested for >= or <=.

[Reply #36 on:]

tell me the mistakes if any

[Reply #37 on:]

Well, as usual, you're ignoring what you're being told.
How many times do you need to be told that adding the same number twenty times and then dividing by twenty is a waste of time?
How many times have I told you that static analysis of software is about the least productive way of debugging?

Again

Code:

if ( finaldir < 20 && finaldir > 340 )//

Can you list all the values of "finaldir" which are going to trigger this condition?
(Hint: It's a very short list)