MQTT - The Standard for IoT Messaging
https://mqtt.org/
MQTT is an OASIS standard messaging protocol for the Internet of Things (IoT). It is designed as an extremely lightweight publish/subscribe messaging transport that is ideal for connecting remote...
MQTT - Wikipedia
https://en.wikipedia.org/wiki/MQTT
The Message Queuing Telemetry Transport (MQTT) is a lightweight, publish-subscribe network protocol that transports messages between devices. The protocol usually runs over TCP/IP; however, any network protocol that provides ordered, lossless, bi-directional connections can support MQTT.
Beginners Guide To The MQTT Protocol
http://www.steves-internet-guide.com/mqtt/
MQTT stands for MQ Telemetry Transport but previously was known as Message Queuing Telemetry Transport. MQTT is fast becoming one of the main protocols for IOT (internet of things)...
Getting Started with MQTT
https://www.hivemq.com/blog/how-to-get-started-with-mqtt/
MQTT is a publish/subscribe protocol that is lightweight and requires a minimal footprint and bandwidth to connect an IoT device. Unlike HTTP's request/response paradigm...
MQTT - Lightweight IoT Messaging Protocol | EMQ
https://www.emqx.io/mqtt
MQTT protocol is an IoT messaging protocol based on the publish-subscribe model. It has occupied half of the IoT protocol because of its simple and easy to implement, supporting QoS and small packet.
Use the AWS IoT MQTT messaging protocol for your devices.
https://docs.aws.amazon.com/iot/latest/developerguide/mqtt.html
MQTT is a lightweight and widely adopted messaging protocol that is designed for constrained For information about how AWS IoT differs from the MQTT v3.1.1 specification, see AWS IoT differences...
MQTT X - An Elegant Cross-platform MQTT 5.0 Desktop Client
https://mqttx.app/
MQTT X is a cross-platform MQTT 5.0 desktop client tool open sourced by EMQ, which can run on macOS, Linux and Windows, and supports formatting MQTT payload.
mqtt - npm
https://www.npmjs.com/package/mqtt
Note: MQTT v5 support is experimental as it has not been implemented by brokers yet. v2.0.0 removes support for node v0.8, v0.10 and v0.12, and it is 3x faster in sending packets.