Question: QoS

[michael-benoit]

How do I specify the QoS of a message to publish?

[SeppPenner]

Good question, I need to check this again. Still some time after my last changes here...

[SeppPenner]

The short answer at the moment is: You can't :D Don't ask me why, but somehow I assumed that all Sparkplug messages should be sent with QoS=1 (Which in 2.2 was only the case for state messages as far as I researched it now). I will try to change this and provide full 3.0 compatibility with the TCK from Ecplise as requested under #39, so I guess you need to wait for that to be done.

[SeppPenner]

Needs to be checked. Some messages must be sent with QoS 0 and retain = false (E.g. NBIRTH, NDATA).

[SeppPenner]

Is checked against Sparkplug version 3.0:

NBIRTH --> QoS = 0
NDEATH --> Not fix
DBIRTH --> QoS = 0
DDEATH --> QoS = 0
NDATA --> QoS = 0
DDATA --> QoS = 0
NCMD --> QoS = 0
DCMD --> QoS = 0
STATE --> QoS = 1

Only NDEATH allows to specify a QoS explicitely.

[SeppPenner]

Update: The request is completely invalid against the V3.0 spec:

• Edge node will message QoS must be set to 1.
• Edge node will message retain flag must be set to false.

Edge node will message = DDEATH