Eclipse Paho C Client Library for the MQTT Protocol

The Paho C client comprises four variant libraries, shared or static:

    paho-mqtt3a - asynchronous (MQTTAsync)
    paho-mqtt3as - asynchronous with SSL (MQTTAsync)
    paho-mqtt3c - "classic" / synchronous (MQTTClient)
    paho-mqtt3cs - "classic" / synchronous with SSL (MQTTClient)