CoDeSys2 MQTT Library

This project initially started from backporting of http://codesys-mqtt-library.sourceforge.net/ version 3.5.0.0.
This Client follows MQTT Specifications v3.1.1.
The only dependencies are Standard, SysLibSockets and SysLibMem libraries.

The following MQTT features are supported:

• CONNECT (incl. randomized or defined ClientId, User/Password authentication, Last Will QoS 0, auto. reconnection) / DISCONNECT
• Keep Alive (PINGREQ / PINGRESP)
• PUBLISH QoS 0 (incl. Retain)
• SUBSCRIBE QoS 0 (SUBACK) / UNSUBSCRIBE (UNSUBACK)