MQTT NIO

A Swift NIO based MQTT v3.1.1 and v5.0 client.

MQTT (Message Queuing Telemetry Transport) is a lightweight messaging protocol that was developed by IBM and first released in 1999. It uses the pub/sub pattern and translates messages between devices, servers, and applications. It is commonly used in Internet of things (IoT) technologies.

MQTTNIO is a Swift NIO based implementation of a MQTT client. It supports

• MQTT versions 3.1.1 and 5.0.
• Unencrypted and encrypted (via TLS) connections
• WebSocket connections
• Posix sockets
• Apple's Network framework via NIOTransportServices (required for iOS).
• Unix domain sockets

You can find documentation for MQTTNIO here. There is also a sample demonstrating the use MQTTNIO in an iOS app found here