> For the complete documentation index, see [llms.txt](https://docs.eseye.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.eseye.com/smartconnect/at-command-reference/mqtt-at-commands/mqtt-rx-queue.md).

# MQTT Rx Queue

When AnyNet SMARTconnect™ is subscribed to a topic and receives new MQTT messages, it can perform either of the following functions:

* Immediately forward the messages on the AT port in URC format. See [+EMQ Unsolicited Response Codes (URCs)](/smartconnect/at-command-reference/mqtt-at-commands/+emq-unsolicited-response-codes-urcs.md).

  The response format is:

  ```
  +EMQ:
  ```

  It includes the message index, length in bits, and forwarded MQTT message.
* If the MQTT Rx Queue is enabled, store up to three MQTT messages in a queue in the module’s volatile memory.

  If AnyNet SMARTconnect™ receives further messages, it overwrites the existing messages, starting with the oldest.

  Messages use the following [+EMQREAD](/smartconnect/at-command-reference/mqtt-at-commands/emqread-read-message-from-mqtt-rx-queue.md) format:

  ```
  +EMQREAD:
  ```

  Use the `[mqtt] mqttenablerxqueue` parameter in the [AnyNet SMARTconnect™ configuration file](/smartconnect/getting-started/using-the-anynet-smartconnect-tm-configuration-file.md) to enable or disable the MQTT Rx Queue.

## Status flags

If the MQTT Rx Queue is enabled, you can use the following status flags to obtain information about the internal status of AnyNet SMARTconnect™:

* `MQTT RX` — Set when messages appear in the MQTT Rx Queue.
* `MQTT RXov` — Set when the oldest received message is overwritten.
* `MQTT TX Internal error` — Set when a message cannot be stored.
* `MQTT TXov` — Set when the oldest transmitted message is overwritten.
* `MQTT TX OK` — Set when a transmitted message is published.
* `MQTT TX Refused` — Set when the broker rejects a message or closes the SSL connection five times.
* `Reboot required` — Set when an update requires a reboot.
* `Update fail` — Set when a host firmware, configuration, or AnyNet SMARTconnect™ update fails.
* `Update success` — Set when a host firmware, configuration, or AnyNet SMARTconnect™ update completes.

The module clears the flags when their documented reset condition occurs.

Check the status flags with [ETMINFO – displays AnyNet SMARTconnect™ and device information](/smartconnect/at-command-reference/management-at-commands/etminfo-displays-anynet-smartconnect-tm-and-device-information.md).


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.eseye.com/smartconnect/at-command-reference/mqtt-at-commands/mqtt-rx-queue.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.