树莓派-获取温度传到服务器

/************** *description:this is client which gets time and temperature, then sends them to server *file: ds_client.c *author:xiong *vision:2.0 ****************/ #include <stdio.h> #include <sys/types.h> #include <sys/socket.h> #include <unistd.h> #include <arpa/inet.h> #include <string.h> #include <errno.h> #include <netinet/in.h> #include "ds18b20.h" #include "ds18b20.c" #include <stdlib.h> #include <time.h> #define BUF_SIZE 1024 #define PORT 8899 #define MSG_STR "hello\n" #define SERVER_IP "127.0.0.1" int main(int argc, char **argv) { int con_fd = -1; int rv = -1; float temper; char dest_file[BUF_SIZE]; char buf[BUF_SIZE]; struct tm timeStruct; struct sockaddr_in serv_addr; char temp[BUF_SIZE]; time_t timep; struct tm *p; char year[20]; char month[20]; char day[20]; char hour[20]; char min[20]; char second[20]; while(1) { memset(buf, 0, sizeof(buf)); memset(temp, 0, sizeof(temp)); //获取温度 Get_file(dest_file); temper = Get_tempera(dest_file); //获取时间 /* time_t currentTime = time(NULL); localtime_r(&currentTime, &timeStruct); char buffer[20]; strftime(buffer, 20, "%Y-%m-%d %H:%M:%S", &timeStruct); */ /*time(&timep); p = gmtime(&timep); sprintf(year,"%d", (1900+p->tm_year)); strcat(buf, year); strcat(buf, "-"); sprintf(month,"%02d", (1+p->tm_mon)); strcat(buf, month); strcat(buf, "-"); sprintf(day,"%02d", p->tm_mday); strcat(buf, day); strcat(buf, " "); sprintf(hour,"%02d", p->tm_hour+8); strcat(buf, hour); strcat(buf, ":"); sprintf(min,"%02d", p->tm_min); strcat(buf, min); strcat(buf, ":"); sprintf(second,"%02d", p->tm_sec); strcat(buf, second); */ time_t tt = time(0); strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", localtime(&tt)); strcat(buf," DS18B20 get temperature: "); snprintf(temp, 11, "%.3f", temper); strcat(buf, temp); printf("%s\n", buf); con_fd = socket(AF_INET, SOCK_STREAM, 0); if(con_fd < 0) { printf("create socket failure:%s\n", strerror(errno)); return -1; } memset(&serv_addr, 0, sizeof(serv_addr)); serv_addr.sin_family = AF_INET; serv_addr.sin_port = htons(PORT); inet_aton(SERVER_IP, &serv_addr.sin_addr); if( connect(con_fd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0 ) { printf("connect to server [%s:%d] failure:%s\n", SERVER_IP, PORT, strerror(errno)); return -2; } if( write(con_fd, buf, strlen(buf)) < 0 ) { printf("write data to server [%s:%d] failure:%s\n", SERVER_IP, PORT, strerror(errno)); goto cleanup; } sleep(3); } cleanup: close(con_fd); return 0; }