How to send float values through serial com?

[php444]

you should use sprintf

char v[4];

sprintf(v,"%.2f",your_var);

then send var v on serial

[Tesla DeLorean]

Likely going to want more than 4 bytes to hold the string and NUL

Do you want to send the data in an ASCII form, or the form it is stored in memory?

For strings also fota() and dtoa() functions.

https://www.geeksforgeeks.org/convert-floating-point-number-string/

https://chromium.googlesource.com/native_client/nacl-newlib/+/master/newlib/libc/stdlib/dtoa.c

[sali.1]

#include <stdio.h>

char buffer[200];

int i, j;

double fp;

char *s = "baltimore";

char c;

int main(void)

{

  c = 'l';

  i = 35;

  fp = 1.7320508;

  /* Format and print various data */

  j = sprintf(buffer, "%s\n", s);

  j += sprintf(buffer+j, "%c\n", c);

  j += sprintf(buffer+j, "%d\n", i);

  j += sprintf(buffer+j, "%f\n", fp);

  printf("string:\n%s\ncharacter count = %d\n", buffer, j);

}

/********************* Output should be similar to: *************

string:

baltimore

l

35

1.732051

character count = 24      */