String object to int

Projects Programming
1

This is an old question that seems it doesn't want to disappear, but after all and reading old posts and google around it, I've not found the solution :frowning: I try to do a simple task like convert one String object to int (or float).

  int length = values[0].length();
  char time[length+1];
  values[0].toCharArray(time, sizeof(time));
  int t = atoi(time);
  Serial.println(t);
  Serial.println(time);

If values[0] has 227759 value... when I execute the code before, I receive the next result:

31151
227759

The char time is correct, but fails miserably the atoi() conversion... What am I doing wrong? It turns me mad!

Thanks for advance!
Xavier

2

It may not be obvious, but you can't fit

227759

into an int.

Try a "long" and "atol"

3

ints can contain values from -32,768 to 32,767. Anything outside that and you get overflow. You'll need to use a long to contain larger values.

4

Epic fail!!!!

It was obvious!

double t = atof(time);

Thanks!!

5

Epic fail!!!!

Is right.

double t = atof(time);

The time string does not contain a float value. It contains an unsigned long!

6

Ok, but wha'ts the right function? is there any atod? :roll_eyes:

7

Pssst, up there ^^^ reply #1

8

Double epic fail! :blush: