This is a preview version of the DisplayLink DL-7450 Software Development Kit Documentation. The functionality that is described and made available in this version is subject to addition, removal or change without warning.

class MqttError

Represents an error during an MQTT operation.

class mqtt.MqttError

errno: int

This table gives some of the possible error codes. For debugging purposes, the mqtt.ErrorDescription function can be used to obtain a human-readable version of the error code.

errno	Meaning
0	No error
-1	Generic error
-2	Persistence error
-3	The client is disconnected
-4	The maximum number of in-flight messages reached
-5	Invalid UTF-8 string
-6	Invalid None value provided
-9	Invalid QOS value
-10	No more message IDs
-14	Bad protocol in URL

args: List

Further arguments for the error. At present only args[1] is used, and is a human-readable string describing the error. Please note, MqttError.args[0] is equivalent to MqttError.errno.