# stem_mqtt v0.6.1 - API Reference

## Modules

- [StemMqtt.Broker](StemMqtt.Broker.md): An embeddable MQTT 3.1.1 / 5.0 broker: for tests, edge devices, or an app
that is its own broker.
- [StemMqtt.Client](StemMqtt.Client.md): An MQTT 3.1.1 / 5.0 client.
- [StemMqtt.Message](StemMqtt.Message.md): A PUBLISH delivered to a subscription, sent to the client's owner as
`{:stem_mqtt, client.id, {:message, %StemMqtt.Message{}}}`.