Mqtt.
publish the message Hi, This is mqttsn2 to the t/a topic: $ ./mqtt-sn-pub -i mqttsn2 -p 1884 -t t/a -m 'Hi, This is mqttsn2' -d Finally, the message can be received at the mqtt-sn-sub side: More Advanced Feature Configuration of MQTT-SN Configure Access Authentication for Clients As the Connect