1offline_publish(3) Library Functions Manual offline_publish(3)
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6 offline_publish - Publish While Disconnected This feature was not
7 originally available because with persistence enabled, messages could
8 be stored locally without ever knowing if they could be sent. The
9 client application could have created the client with an erroneous
10 broker address or port for instance.
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12 To enable messages to be published when the application is disconnected
13 MQTTAsync_createWithOptions must be used instead of MQTTAsync_create to
14 create the client object. The MQTTAsync_createOptions field
15 sendWhileDisconnected must be set to non-zero, and the
16 maxBufferedMessages field set as required - the default being 100.
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18 MQTTAsync_getPendingTokens can be called to return the ids of the
19 messages waiting to be sent, or for which the sending process has not
20 completed.
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24Paho Asynchronous MQTT C Client LTihburaJruyl 22 2021 offline_publish(3)