= MQTT Consumer A consumer that allows you to send messages using the MQTT protocol. == Beans for injection The `MqttConsumerConfiguration` auto-configuration provides the following bean: `Consumer<Message<?>> mqttConsumer` You can use `mqttConsumer` as a qualifier when injecting. == Configuration Options All configuration properties are prefixed with `mqtt.consumer`. For more information on the various options available, please see link:src/main/java/org/springframework/cloud/fn/consumer/mqtt/MqttConsumerProperties.java[MqttConsumerProperties]. A `ComponentCustomizer<MqttPahoMessageHandler>` bean can be added in the target project to provide any custom options for the `MqttPahoMessageHandler` configuration used by the `mqttConsumer`. == SSL Configuration The MQTT Paho client can accept an SSL configuration via `MqttConnectOptions.setSSLProperties()`. These properties are exposed on the `MqttProperties.sslProperties` map. The keys for these SSL properties should be taken from the `org.eclipse.paho.client.mqttv3.internal.security.SSLSocketFactoryFactory` constants, which all start with the `com.ibm.ssl.` prefix. == Tests See this link:src/test/java/org/springframework/cloud/fn/consumer/mqtt/MqttConsumerTests.java[test suite] for the various ways, this consumer is used. == Other usage See this https://github.com/spring-cloud/stream-applications/blob/master/applications/sink/mqtt-sink/README.adoc[README] where this consumer is used to create a Spring Cloud Stream application where it makes a MQTT sink.