Subscribe to MQTT messages from an AMQP client on RabbitMQ?

Question

I run a RabbitMQ node with the MQTT/WebMQTT plugins enabled. All MQTT plugin settings use the default configuration. Various MQTT clients are sending messages to MQTT channels. The MQTT channel names follow the format of devices/{device_id_here}/{special_name_here}

I wish to subscribe to all MQTT messages that would match devices/#/logs in MQTT. How can I accomplish this using an AMQP client on the same broker as the MQTT users?

I am using Bunny as my (Ruby) AMQP client.

Answer 1

You can not use the # wildcard in the middle of a MQTT topic subscription as it is capable of matching multiple levels.

The correct wildcard is + as this only matches a single level in the topic hierarchy. E.g.

device/+/logs