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Once again, I represent at the top of the LoRaWAN server and at the bottom the IoT platform.
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We want to connect them with the MQTT protocol, but this time the broker is not on the LoRaWAN
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server, as we've seen before, it's a complete independent entity between the LoRaWAN server and
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the IoT platform.
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In that case, we need to install and configure it.
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Of course, we could use a public MQTT broker and try this configuration, but keep in mind that
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if you do so, all datas are public, so please try that only for testing purposes.
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Great.
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So now same question as before.
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Who is the subscriber and who is the publisher?
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Let's separate the uplink stream and the downlink stream.
For the uplink stream,
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there is one publisher on the LoRaWAN server.
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It will publish on the Broker all uplink messages on a specific topic that you can often choose yourself
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or at least customize.
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And there is one subscriber on the IoT platform.
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It's going to receive data of its favorite topic on the broker.
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For the downlink stream, there is one publisher on the IoT platform.
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It will publish on the broker all downlink messages on a specific topic.
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And there is one subscriber on the LoRaWAN server.
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It will receive all messages sent by the IoT platform and depending on the topic, the messages will
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have a different meaning.