Broker Disconnect Error Codes
Error Code | Reason | Details | Suggested Action |
|---|---|---|---|
21/22/23 | Timeout waiting for PUBACK/PUBREC/PUBCOMP | The MQTT client connection is publishing with a specific QoS and is expecting a response back from the broker that was never received. This could happen for several reasons but the main two are that the broker may not support the QoS that is configured or the message was lost in transit. | Try lowering the QoS on your publisher object or publish schedules |
15 | Lookup Error | The broker address could not be connected to, this might be because the DNS could not be reached. | Ensure your broker address is reachable from the node |