update mqttd, add ID match support

guowenxue

2019-06-26 57b8d8022cf8444cf59cd20a25cfee491ec88799

 modules/c/ds18b20.c

@@ -116,5 +116,7 @@
    /* convert string value to float value */
    *temp = atof(ptr)/1000;
   
    close(fd);

    return 0;
}