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...It is a publish/subscribe, extremely simple and lightweight messaging protocol, designed for constrained devices and low-bandwidth, high-latency or unreliable networks. To run MQTT Broker locally, EMQX is recommended: An Open-Source, Cloud-Native, Distributed MQTT Broker for IoT. After the MQTT is connected successfully, you can perform MQTT publish and subscription tests.

ThingsBoard is an open-source IoT platform for data collection, processing, visualization, and device management. It enables device connectivity via industry standard IoT protocols, MQTT, CoAP and HTTP and supports both cloud and on-premises deployments. ThingsBoard combines scalability, fault-tolerance and performance so you will never lose your data.

Zigbee2MQTT is an open-source bridge that lets users operate Zigbee devices without relying on proprietary vendor gateways. It connects compatible Zigbee adapters to devices and translates their events and controls into MQTT messages. This makes Zigbee hardware usable with a wide range of home automation platforms rather than tying it to one ecosystem.