Setting up MQTT on the Pi with AdafruitIO
In order to set up MQTT, we'll need a broker. While the Pi can itself serve as a broker (see the Further reading section), we don't need broker functionality on the Pi. We can use AdafruitIO to create a broker that we can subscribe to topics with on our Pi.Â
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Creating an account and a feed
First, we'll go to https://io.adafruit.com/ and create a free account. Then, you'll be taken to a dashboard:
We'll need to set up a feed and get our AIO key in order to get started on the Pi. To set up a feed, select Feeds in the left-hand menu. Then, click the Actions button in the upper left corner:
Next, select Create New Feed from the dropdown. Name your feed (I named mine hands-on-robotics-with-js to make it easy to remember what I created it for). Then, you'll be taken to your new feed's page:
Now that we've created our feed, we can get all the information we need to get the Pi hooked up to it. First, let's get the Feed key to give to the MQTT module. Click Feed...
