* @param port The API's port.
* @param path The optional path (may be NULL).
* @param topic The optional topic part of the URL (may be NULL).
+ * @param ring_buf_size Ring buffer size (>=100) ~ Avg Messages in 1hr
* @param secure Whether to use HTTPS (0=HTTP, 1=HTTPS).
* @param cert_file_path Path to client certificate file
* @param key_file_path Path to client key file
int port,
const char * const path,
const char * const topic,
+ int ring_buf_size,
int secure,
const char * const cert_file_path,
const char * const key_file_path,