|  | Paho Asynchronous MQTT C Client Library
    | 
#include <MQTTAsync.h>
| Data Fields | |
| MQTTAsync_token | token | 
| int | code | 
| const char * | message | 
The data returned on completion of an unsuccessful API call in the response callback onFailure.
| MQTTAsync_token token | 
A token identifying the failed request.
| int code | 
A numeric code identifying the error.
| const char* message | 
Optional text explaining the error. Can be NULL.
 1.8.17
 1.8.17