update infinfrared, monitored, sht20, ds18b20 python code

Guo Wenxue

2019-03-19 9d78305854750d631a2c74b3fa77eeadf4616856

 apue/2.Socket/socket_client.c

@@ -109,7 +109,8 @@
          }
       }

       //printf("Read %d bytes data from server: '%s'\n", rv, buf);

       sleep(5);
    }