MQTT-SN To MQTT Gateway Using Node-Red @stevecope

Uploaded August 2024 | Updated September 2026, 3 weeks ago

In this video tutorial we look at a demo flow that implements an MQTT-SN to MQTT gateway in node red using QOS -1 or QOS 3 in MQTT-SN. This allows you to publish without a connection.
The video also demonstrates sending data between two MQTT-SN clients without using a broker or Gateway.
Although sending messages from MQTT to MQTT_SN is possible it isn't really feasible dur to the lack of a subscription.
Therefore it is only really suitable for messages from MQTT-SN to MQTT. This isn't really a big drawback as many sensors like smoke alarms,temperature,motion sensors only need to send data.
Although it is currently only available for node-red the idea could be easily transported to python, c, nodejs etc to create a very simple gateway .

The mqttsn-packet module used is here
npmjs.com/package/mqttsn-packet
Demo Flow
buymeacoffee.com/steveh5u/e/286019

MQTT-SN tutorials
steves-internet-guide.com/mqtt-sn
steves-internet-guide.com/using-the-paho-mqtt-sn-gateway
steves-internet-guide.com/mqtt-sn-publish-and-subscribe-test-tools

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