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Special Forums IP Networking A Basic example of socket programming in C Post 302999394 by Corona688 on Monday 19th of June 2017 11:03:06 AM
Old 06-19-2017
It sends humidity, temperature, and light as one line because you read from all three:

Code:
 while ((fgets(line1, MAXLINE, pF_temperature) != NULL) &&
        (fgets(line2, MAXLINE, pF_light) != NULL) &&
        (fgets(line3, MAXLINE, pF_humidity) != NULL))

...then remove newlines from all three:
Code:
    line1[strcspn(line1, "\r\n")] = 0;        //remove newline
    line2[strcspn(line2, "\r\n")] = 0;        //remove newline
    line3[strcspn(line3, "\r\n")] = 0;        //remove newline

...then concatenate all three with labels and tabs inbetween:

Code:
    strcat(sendline, "TEMPERATURE = ");
    strcat(sendline, line1);

    strcat(sendline, "\tLIGHT = ");
    strcat(sendline, line2);

    strcat(sendline, "\tHUMIDITY = ");
    strcat(sendline, line3);

Then send all three:

Code:
send(sockfd, sendline, strlen(sendline), 0);

You are not using my code at all.

Last edited by Corona688; 06-19-2017 at 12:13 PM..
 

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STRING(3)						   BSD Library Functions Manual 						 STRING(3)

NAME
stpcpy, strcat, strncat, strchr, strrchr, strcmp, strncmp, strcasecmp, strncasecmp, strcpy, strncpy, strerror, strlen, strpbrk, strsep, strspn, strcspn, strstr, strtok, index, rindex -- string specific functions LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <string.h> char * stpcpy(char *dst, const char *src); char * strcat(char *s, const char * append); char * strncat(char *s, const char *append, size_t count); char * strchr(const char *s, int c); char * strrchr(const char *s, int c); int strcmp(const char *s1, const char *s2); int strncmp(const char *s1, const char *s2, size_t count); int strcasecmp(const char *s1, const char *s2); int strncasecmp(const char *s1, const char *s2, size_t count); char * strcpy(char *dst, const char *src); char * strncpy(char *dst, const char *src, size_t count); char * strerror(int errno); size_t strlen(const char *s); char * strpbrk(const char *s, const char *charset); char * strsep(char **stringp, const char *delim); size_t strspn(const char *s, const char *charset); size_t strcspn(const char *s, const char *charset); char * strstr(const char *big, const char *little); char * strtok(char *s, const char *delim); char * index(const char *s, int c); char * rindex(const char *s, int c); DESCRIPTION
The string functions manipulate strings terminated by a null byte. See the specific manual pages for more information. For manipulating variable length generic objects as byte strings (without the null byte check), see bstring(3). Except as noted in their specific manual pages, the string functions do not test the destination for size limitations. SEE ALSO
bstring(3), index(3), rindex(3), stpcpy(3), strcasecmp(3), strcat(3), strchr(3), strcmp(3), strcpy(3), strcspn(3), strerror(3), strlen(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strstr(3), strtok(3) STANDARDS
The strcat(), strncat(), strchr(), strrchr(), strcmp(), strncmp(), strcpy(), strncpy(), strerror(), strlen(), strpbrk(), strspn(), strcspn(), strstr(), and strtok() functions conform to ISO/IEC 9899:1990 (``ISO C90''). BSD
December 11, 1993 BSD
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