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Okay, so now that the installation process is done, let's build our IoT platform.
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But first of all, what are our requirements?
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What we want to do is to have a simple dashboard with two datas: the temperature, which is the user
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payload sent by the device and the RSSI
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so we can track the signal power received on the gateway for a specific device.
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We're going to do this in three steps.
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First, we're going to build an MQTT subscriber on Node-RED to get the uplink data.
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We've done it already in the previous chapter, but we'll do it quickly again.
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And at any time, if we want to check if the Node-RED configuration is correct, we'll use a debug node
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to display the logs and verify that everything works well.
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Secondly, among all the data received on the subscriber node, we're going to extract the exact value
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we want to use for our dashboard.
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In our case it will be the temperature and the RSSI.
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And finally we'll send the temperature on the RSSI value to the Influxdb database. To check that the values
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have been stored properly,
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we'll connect the database thanks to the Influxdb user interface and check that our data are available.
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The third and last step is to tell Grafana how it can access the database.
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So we'll configure it with all the required value and credentials.
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Then we'll just have to create a new request with the name and the range of time of the needed value.
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Again, our value will be the temperature and the RSSI.
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Let's start with the first step in the next video.