|  | MQTT C Client Libraries Internals
    | 
The data returned on completion of an unsuccessful API call in the response callback onFailure. More...
#include <MQTTAsync.h>
| Data Fields | |
| 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.  More... | |
The data returned on completion of an unsuccessful API call in the response callback onFailure.
| const char* MQTTAsync_failureData::message | 
Optional text explaining the error.
Can be NULL.
 1.8.17
 1.8.17