cannot convert 'const char*' to 'float'

Projects Programming
1

I would like to convert GPS data which are const char example: 5020.37660 to float number but I have a problem. I used the code:

float latitude = atof(pdop.value());
float deg = (int) latitude; 
serial.print (deg);

Unfortunately it does not work in serial monitor shows 0
How to make this conversion work ?

2

Post your code, post your error messages.

3

Please post the entire sketch, and the link where you downloaded the GPS library.

As a test, your program should print out the contents of the presumed character array populated by pdop.value().

4

results from code below -- capitalized the "s" in serial.print

5020.37660
5020.00

const char *s = "5020.37660";

struct {
    const char *value () { return s; };
} pdop;

void
setup (void)
{
    Serial.begin (9600);

    Serial.println (pdop.value());

    float latitude = atof(pdop.value());
    float deg      = (int) latitude;
    Serial.print (deg);
}

void
loop (void)
{
}
5

gcjr Thanks a lot for the sketch it works great.

Maybe you can tell me how to do it.
instead of 5020.00 it was at exit 50203766

6

Please post the minimum sketch that demonstrates the error.

it was at exit 50203766

Nonsensical value.

7

Damian01:
instead of 5020.00 it was at exit 50203766

isn't 50203766 too large to be an integer (which is cast it to)

8

Is this another learning exercise or are you actually trying to initialize the variable, e.g.

    float latitude = 5020.37660;

?

You will certainly never get a const anything from a GPS.