Add EMQX to Internet of Things (#3238)

README.md

@@ -1082,6 +1082,7 @@ A [human resources management system](https://en.wikipedia.org/wiki/Human_resour
 
 - [DeviceHive](https://www.devicehive.com/) - Open Source IoT Platform with a wide range of integration options. ([Demo](https://playground.devicehive.com/), [Source Code](https://github.com/devicehive/devicehive-java-server)) `Apache-2.0` `Java`
 - [Domoticz](https://www.domoticz.com/) - Home Automation System that lets you monitor and configure various devices like: Lights, Switches, various sensors/meters like Temperature, Rain, Wind, UV, Electra, Gas, Water and much more. ([Source Code](https://github.com/domoticz/domoticz), [Clients](https://github.com/domoticz/domoticz-android)) `GPL-3.0` `C/C++`
+- [EMQX](https://www.emqx.io/) - An ultra-scalable open-source MQTT broker. Connect 100M+ IoT devices in one single cluster, move and process real-time IoT data with 1M msg/s throughput at 1ms latency. ([Demo](https://www.emqx.com/en/mqtt/public-mqtt5-broker), [Source Code](https://github.com/emqx/emqx)) `Apache-2.0` `Docker`
 - [FHEM](https://fhem.de/fhem.html) - FHEM is used to automate common tasks in the household like switching lamps and heating. It can also be used to log events like temperature or power consumption. You can control it via web or smartphone frontends, telnet or TCP/IP directly. ([Source Code](https://svn.fhem.de/trac)) `GPL-3.0` `Perl`
 - [Gladys](https://gladysassistant.com/) - Gladys is a privacy-first, open-source home assistant. ([Source Code](https://github.com/GladysAssistant/Gladys)) `Apache-2.0` `Nodejs`
 - [Home Assistant](https://home-assistant.io/) - Open-source home automation platform. ([Demo](https://home-assistant.io/demo/), [Source Code](https://github.com/home-assistant/core)) `Apache-2.0` `Python`