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MQTT

test broker connection

docker run -it hivemq/mqtt-cli shell
 
con -h mqtt.example.com -p 1884

mosquitto_pub -h mqtt.example.com -p 1884 -t test -m “test” 

sudo apt install node-mqtt
mqtt publish -t 'test' -m 'test' -h 'mqtt.example.com' -p 1884