linux 下上传 datapoint数据到yeelink 修改版本

  1 /*client.c*/
  2 #include <stdio.h>
  3 #include <stdlib.h>
  4 #include <string.h>
  5 #include <netinet/in.h>
  6 #include <arpa/inet.h>
  7 #include <unistd.h>
  8 #include <fcntl.h>
  9 #include <sys/stat.h>
 10 #include <sys/types.h>
 11 #include <sys/socket.h>
 12 #define PORT 80
 13 #define REMOTE_IP "42.96.164.52" //api.yeelink.net = 42.96.164.52
 14 
 15 //#define PORT 4321
 16 //#define REMOTE_IP "192.168.1.104"
 17 
 18 
 19 // int GetCpuTemp() {
 20 //char *GetCpuTemp() {
 21 float GetCpuTemp() {
 22 
 23     int fd, size;
 24     int temp = 0;
 25    char buffer[15] = { };
 26    fd = open("/sys/class/thermal/thermal_zone0/temp", O_RDONLY);
 27    size = read(fd,buffer, sizeof(buffer));
 28    close(fd);
 29     int tmp;
 30   // strcpy(tmp,buffer);
 31 
 32    temp = atoi(buffer);
 33    float tf = atof(buffer);
 34    printf("float temp = %2.2f
", tf/1000);
 35 
 36   // printf("temp = %d
",temp / 1000);
 37 
 38   // sprintf(tmp,"%d",temp / 1000);
 39   // printf(" temp1 =%s
",tmp);
 40   // printf(" temp2 = %s
",buffer);
 41 
 42   // return (temp/1000) ;
 43      return (tf/1000);
 44 }
 45 
 46 
 47 
 48 int   main(int argc,char *argv[])
 49 {
 50    int s ;
 51    struct sockaddr_in addr ;
 52     char mybuffer[256];
 53         char *str1="POST /v1.0/device/19374/sensor/33945/datapoints HTTP/1.0
Host: api.yeelink.net
Accept: */*
";
 54         char *str2="U-ApiKey: 108968b03a7e9334b2aca7c45b199dee
Content-Length: 15
Content-type: application/json;charset=utf-8
"; //
 //                             此处的Content-Length: 15是决定改善的数据的长度 = strlen("values":33.35) = 15 
 55         char *str3="
";
 56         char *str10;
 57         printf("GetCpuTemp() = %2.2f
",GetCpuTemp());
 58 
 59        sprintf(str10,"{"value":%2.2f}
",GetCpuTemp());
 60      //    str10 = "{"value":33.0}
";
 61        printf("str10 = %s
", str10);
 62    //    char *str10="{"value":14}
";
 63    //  printf("str10 = %s
",str10);
 64 
 65    if( (s=socket(AF_INET,SOCK_STREAM,0))<0 )  //IPV4 TCP
 66    {
 67       perror("socket");
 68       exit(1);
 69    }
 70    else
 71    {
 72         printf("socket created .
");
 73         printf("socked id: %d 
",s);
 74         }
 75 
 76    bzero(&addr,sizeof(addr));
 77    addr.sin_family =AF_INET;  //IPV4
 78    addr.sin_port=htons(PORT); //SERVER PORT
 79    addr.sin_addr.s_addr=inet_addr(REMOTE_IP);  //SERVER IP
 80 
 81    if(connect(s,(struct sockaddr *)&addr,sizeof(addr))<0)
 82    {
 83       perror("connect");
 84       exit(1);
 85    }
 86    else
 87    {
 88            printf("connected ok!
");
 89            printf("remote ip:%s
",REMOTE_IP);
 90            printf("remote port:%d
",PORT);
 91     }
 92 
 93         bzero(mybuffer,sizeof(mybuffer));
 94 
 95 //send http request
 96         printf("tcp send start!--");
 97    if(send(s,str1,strlen(str1),0)<0)
 98       {
 99          perror("send");
100          exit(1);
101       }
102    if(send(s,str2,strlen(str2),0)<0)
103       {
104          perror("send");
105          exit(1);
106       }
107    if(send(s,str3,strlen(str3),0)<0)
108       {
109          perror("send");
110          exit(1);
111       }
112 //body
113    if(send(s,str10,strlen(str10),0)<0)
114       {
115          perror("send");
116          exit(1);
117       }
118 
119    printf("tcp send ok!--");
120 
121    recv(s ,mybuffer,sizeof(mybuffer),0);
122    printf("%s
",mybuffer);
123    printf("enter os");
124 
125    while(1 )
126    {
127          bzero(mybuffer,sizeof(mybuffer));
128          recv(s ,mybuffer,sizeof(mybuffer),0);
129        //  printf("received:%s
",mybuffer);
130          if (strlen(mybuffer) == 0 ){    // if strlen(mybuffer) == 0, exit the loop
131            return 0;
132         }
133     }
134     return 0;
135 }
修改传递数据的数值参考自：http://home.eeworld.com.cn/my/space-uid-487728-blogid-236541.html
编译方法
gcc -o upload_cpu_temp client.c
./upload_cpu_temp
运行效果如下图：
上传float数值到yeelink
yeelink 上的展示数据如下图：