There is no privacy protection for public access broker. Any device can publish and subscribe to topics on it. Never use it in production.
This public MQTT broker is 2 nodes EMQ X enterprise cluster and deployed in the AWS Oregon region.
For ports 8883 and 8884 you should use the certificate authority file broker.emqx.io-ca.crt to verify the server connection.
Support MQTT v3.1, v3.1.1 and v5.0 protocol specification, and MQTT over WebSocket
Provide subscription sharing, support multiple clients to subscribe to the topic through the way load balancing
This public broker completely supports the message of QoS 0, 1, 2 levels, suitable for the strictly reliable information messaging scenario
Support MQTT/WebSocket encrypted connecting for ensuring the security of information messaging
EMQ provides the online and cross-platform local MQTT test client tool for developers. It can help developers quickly test the subscription, publish/receive messages, connect/disconnect and other features of MQTT protocol.
MQTT WebSocket Toolkit is the MQTT client tool that supports accessing through the browser. It supports multi-client online at the same time, and saving the information of connecting configuration to facilitate multiple tests.Online MQTT Client Tool