> For the complete documentation index, see [llms.txt](https://docs.kiloiot.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.kiloiot.io/kilo-docs-pt/kilo-center/kilo-mioty-service-center/integrations/mqtt-first-steps.md).

# Primeiros Passos com MQTT

Primeiros passos com o MQTT do KiloCenter — ative o broker desativado por predefinição, subscreva eventos e publique downlinks.

### Objetivo

Ativar a integração MQTT e validar o consumo de eventos e a publicação de comandos.

### Pré-requisitos

MQTT está **desativado por predefinição** no KiloCenter. Antes de usar MQTT:

1. Certifique-se de que o broker Mosquitto está em execução (incluído na stack do Docker Compose).
2. Ative o MQTT em `kilocenter-modules/KC-Core/config.yaml`:

```yaml
mqtt:
  enabled: true
  host: "localhost"
  port: 1883
  username: "admin"
  password: "KiloCenter"
```

3. Reinicie o KC-Core para que a alteração tenha efeito.

### Predefinições do Broker Local

| Definição           | Valor                                   |
| ------------------- | --------------------------------------- |
| Broker              | `localhost:1883`                        |
| Nome de utilizador  | `admin`                                 |
| campo Palavra-passe | `KiloCenter`                            |
| Prefixo do tópico   | `mioty` (configurável em `config.yaml`) |

### Subscrever aos Eventos de Uplink

```bash
mosquitto_sub -h localhost -p 1883 \
  -u admin -P KiloCenter \
  -t 'mioty/+/device/+/event/up' -v
```

### Publicar um Comando de Downlink

```bash
mosquitto_pub -h localhost -p 1883 \
  -u admin -P KiloCenter \
  -t 'mioty/default/device/<EP_EUI_HEX>/command/down' \
  -m '{"data":"AQIDBA==","confirmed":false}'
```

Substitua `<EP_EUI_HEX>` pelo EUI do seu endpoint em formato hexadecimal.

### Observe o Tópico de Resultado

```bash
mosquitto_sub -h localhost -p 1883 \
  -u admin -P KiloCenter \
  -t 'mioty/+/device/<EP_EUI_HEX>/event/downlink_result' -v
```

### Contrato de Tópicos e Referência de Payload

Para a estrutura completa dos tópicos e formatos de payload, consulte:

* `kilocenter-modules/docs/mqtt-integration.md`


---

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