PUBACK packet - Publish acknowledgement (QoS 1).
MQTT 5.0 §3.4
Readonly
Packet identifier
Optional
PUBACK properties (5.0)
Reason code (5.0, defaults to 0x00)
Packet type discriminator.
PUBACK packet - Publish acknowledgement (QoS 1).
See
MQTT 5.0 §3.4