printf("Failed to start connect, return code %d\n", rc); exit(EXIT_FAILURE); } 在上述代码中,`MQTTAsync_connect`函数用于连接到MQTT服务器。第一个参数是客户端实例,第二个参数是连接选项,第三个参数是用户上下文,第四个参数是响应选项,其中`onSuccess`指定了连接成功后的回调函数
_successData; 313 324typedef MQTT_onSuccessvoid* context, MQTT_success*response); 325 336 typedef voidMQTTAsync_onFailure(void context, MQTT_failure* response); 337 338typedefstruct 339 { 341 char struct_id[4]; 343 int struct_version; 349 MQTTAsync_onSuccessonSuccess;...
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(void* contextMQTTAsync_failureData* response) { printf("Connectfailed, rc %d\n, response? response->code : 0); finished = 1; } void onConnectvoid* contextAsync_successData* response) { MQTTAsync client = (MQTTAsync)context...
Next is my code after modify: static MQTTAsync_queuedCommand* MQTTAsync_restoreCommand(char* buffer, int buflen) { MQTTAsync_command* command = NULL; MQTTAsync_queuedCommand* qcommand = NULL; char* ptr = buffer; int i; size_t data_size; FUNC_ENTRY; qcommand = malloc(sizeof(MQTTAsync...
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dnsServer.setErrorReplyCode(AsyncDNSReplyCode::ServerFailure); //start DNS server for a specific domain name dnsServer.start(DNS_PORT,"*", apIP); server.onNotFound(handleNotFound); server.begin(); Serial.print(F("HTTP EthernetWebServer is @ IP :")); ...