Same situation for SUBACK
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3.9.2.1 SUBACK Properties3.9.2.1.1 Property Length
The length of Properties in the SUBACK packet Variable Header encoded as a Variable Byte Integer. If the Remaining Length is less than 3, there is no Properties.
Am 03.09.2017 um 13:19 schrieb Christoph Krey <>:
In MQTT V5, the UNSUBACK Payload will be always at least 1 byte long to contain the reason code(s).
Keeping this in mind the Remaining length will always be at least 4 bytes long and the property length variable byte can never be left out.
Please remove the sentence "If the Remaining Length is less than 3 there is no Properties."
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3.11.2.1 UNSUBACK Properties3.11.2.1.1 Property Length
The length of the Properties in the UNSUBACK packet Variable Header encoded as a Variable Byte Integer. If the Remaining Length is less than 3 there is no Properties.
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3.11.3 UNSUBACK Payload
The Payload contains a list of Reason Codes. Each Reason Code corresponds to a Topic Filter in the UNSUBSCRIBE packet being acknowledged. The order of Reason Codes in the UNSUBACK packet MUST match the order of Topic Filters in the UNSUBSCRIBE packet [MQTT-3.11.3-1].
Christoph Krey
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