wolfMQTT support for MQTT v5.0

We are working on adding MQTT v5.0 support to wolfMQTT.

Some of the new MQTT 5 features include:

  • AUTH packet type to submit authentication method/data information after connect.
  • CONNACK packets now include a reason code to better describe connect failures.
  • DISCONNECT now supports server to client.
  • Packets can include optional key/value properties.
  • New data type for UTF-8 string pairs.
  • No retry for QoS 1 and 2 packets (let assumed TCP handle retry).
  • Passwords can be provided without a username

The new specification can be found here:

Support for these new features will be release in the next few weeks as wolfMQTT v1.0.