.TH "MQTTAsync_failureData" 3 "Sat Aug 16 2025 14:15:23" "Paho Asynchronous MQTT C Client Library" \" -*- nroff -*- .ad l .nh .SH NAME MQTTAsync_failureData .SH SYNOPSIS .br .PP .PP \fR#include \fP .SS "Data Fields" .in +1c .ti -1c .RI "\fBMQTTAsync_token\fP \fBtoken\fP" .br .ti -1c .RI "int \fBcode\fP" .br .ti -1c .RI "const char * \fBmessage\fP" .br .in -1c .SH "Detailed Description" .PP The data returned on completion of an unsuccessful API call in the response callback onFailure\&. .SH "Field Documentation" .PP .SS "\fBMQTTAsync_token\fP token" A token identifying the failed request\&. .SS "int code" A numeric code identifying the error\&. .SS "const char* message" Optional text explaining the error\&. Can be NULL\&. .SH "Author" .PP Generated automatically by Doxygen for Paho Asynchronous MQTT C Client Library from the source code\&.