| value |
description |
| -4 : <code>MQTT_CONNECTION_TIMEOUT</code> |
the server didn't respond within the keepalive time |
|
| value |
description |
| -3 : <code>MQTT_CONNECTION_LOST</code> |
the network connection was broken |
|
| value |
description |
| -2 : <code>MQTT_CONNECT_FAILED</code> |
the network connection failed |
|
| value |
description |
| -1 : <code>MQTT_DISCONNECTED</code> |
the client is disconnected cleanly |
|
| value |
description |
| 0 : <code>MQTT_CONNECTED</code> |
the client is connected |
|
| value |
description |
| 1 : <code>MQTT_CONNECT_BAD_PROTOCOL</code> |
the server doesn't support the requested version of MQTT |
|
| value |
description |
| 2 : <code>MQTT_CONNECT_BAD_CLIENT_ID</code> |
the server rejected the client identifier |
|
| value |
description |
| 3 : <code>MQTT_CONNECT_UNAVAILABLE</code> |
the server was unable to accept the connection |
|
| value |
description |
| 4 : <code>MQTT_CONNECT_BAD_CREDENTIALS</code> |
the username/password were rejected |
|
| value |
description |
| 5 : <code>MQTT_CONNECT_UNAUTHORIZED</code> |
the client was not authorized to connect |
|
