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Value | Return Code Response | Description |
|---|---|---|
0 | 0x00 Connection Accepted | Connection accepted |
1 | 0x01 Connection Refused, unacceptable protocol version | The Server does not support the level of the MQTT protocol requested by the Client |
2 | 0x02 Connection Refused, identifier rejected | The Client identifier is correct UTF-8 but not allowed by the Server. This can be caused by a duplicate |
3 | 0x03 Connection Refused, Server unavailable | The Network Connection has been made but the MQTT service is unavailable |
4 | 0x04 Connection Refused, bad user name or password | The data in the user name or password is malformed |
5 | 0x05 | Not used by IoT Core |
13 | 0x13 | All other events for connect, disconnect, publish and subscribe |
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