| Paho MQTT C Client Library

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Data Fields
MQTTClient_createOptions Struct Reference

`#include <MQTTClient.h>`

## Data Fields
char | struct_id [4]
int | struct_version
int | MQTTVersion

## Detailed Description

Options for the MQTTClient_createWithOptions call

## Field Documentation

## ◆ struct_id

char struct_id[4]

The eyecatcher for this structure. must be MQCO.

## ◆ struct_version

int struct_version

The version number of this structure. Must be 0

## ◆ MQTTVersion

int MQTTVersion

Whether the MQTT version is 3.1, 3.1.1, or 5. To use V5, this must be set. MQTT V5 has to be chosen here, because during the create call the message persistence is initialized, and we want to know whether the format of any persisted messages is appropriate for the MQTT version we are going to connect with. Selecting 3.1 or 3.1.1 and attempting to read 5.0 persisted messages will result in an error on create.

The documentation for this struct was generated from the following file:

- MQTTClient.h