Cirrus Link Website
Contact Us (Sales/Support)
Forum
Cirrus Link Modules Docs for Ignition 8.3.x
Cirrus Link Modules Docs for Ignition 7.9.x
Ignition User Manual
Knowledge Base Articles
Inductive University
Forum
...
The chart below summarizes how Quality of Service (QOS), Clean Session flag and Retain Message flag affects what messages are receivedpersisted.
| Retain Message flag | Clean Session flag | Subscribe QOS | Publish QOS | Published Message Persisted |
|---|---|---|---|---|
| False | True | 0 | 0 | No |
| False | True | 0 | 1 or 2 | No |
| False | True | 1 or 2 | 0 | No |
| False | True | 1 or 2 | 1 or 2 | No |
| False | False | 0 | 0 | No |
| False | False | 0 | 1 or 2 | No |
| False | False | 1 or 2 | 0 | No |
| False | False | 1 or 2 | 1 or 2 | Yes - all messages |
| True | True | 0 | 0 | Yes - last message only for each unique MQTT topic |
| True | True | 0 | 1 or 2 | Yes - last message only for each unique MQTT topic |
| True | True | 1 or 2 | 0 | Yes - last message only for each unique MQTT topic |
| True | True | 1 or 2 | 1 or 2 | Yes - last message only for each unique MQTT topic |
| True | False | 0 | 0 | Yes - last message only for each unique MQTT topic |
| True | False | 0 | 1 or 2 | Yes - last message only for each unique MQTT topic |
| True | False | 1 or 2 | 0 | Yes - last message only for each unique MQTT topic |
| True | False | 1 or 2 | 1 or 2 | Yes - all messages |
...