一、可用：

broker.mqttdashboard.com

broker.hivemq.com

• TCP Port: 1883
• Websocket Port: 8000

test.mosquitto.org

• 1883 : MQTT, unencrypted, unauthenticated
• 1884 : MQTT, unencrypted, authenticated
• 8883 : MQTT, encrypted, unauthenticated
• 8884 : MQTT, encrypted, client certificate required
• 8885 : MQTT, encrypted, authenticated
• 8886 : MQTT, encrypted, unauthenticated
• 8887 : MQTT, encrypted, server certificate deliberately expired
• 8080 : MQTT over WebSockets, unencrypted, unauthenticated
• 8081 : MQTT over WebSockets, encrypted, unauthenticated
• 8090 : MQTT over WebSockets, unencrypted, authenticated
• 8091 : MQTT over WebSockets, encrypted, authenticated

broker.emqx.io:1883

二、已停用：

mqtt.eclipse.org

tcp端口：1883

三、本地

emqx下载地址，记得选开源版

开始和停止命令：

emqx start
emqx stop

emqx本地：127.0.0.1   

端口1883

web端口18083

dashboard账号：admin/public