REST interface with Adafruit-IO
The project contains small classes showing how to communicate with Adafruit-IO through REST services.
You need to have your own key, and provide it as a system variable, using
-Dkey=50c0707070c070302030a01040d020a0a0908050 from the command line.
In the examples, the code feeds and reads data to a feed named
onoff, which is a switch. It takes the values
adafruit.io.rest.HttpClient contains a main that pushes data to the
onoff feed, you can take a look at
your Adafruit-IO dashboard and see the widget change its value, when running the code.
Similarly, the sample named
adafruit.io.sample.Poll reads the feed, and will exit when its value changes.
You can change the value from the Adafruit-IO dashboard, and the program will exit.
The classes depend on
json.org to manage the json objects used as payload. The dependency is mentioned in the
gradle build file.
To run the classes, use a command line similar to this ones:
CP=./classes CP=$CP:./lib/json.jar # java -cp $CP -Dkey=50c0707070c070302030a01040d020a0a0908050 adafruit.io.rest.HttpClient # java -cp $CP -Dkey=50c0707070c070302030a01040d020a0a0908050 adafruit.io.sample.Poll
The classpath and the key depend on your own configuration...
See in the
web directory, there is an example of the interaction with a feed defined in Adafruit-IO,
written using jQuery - because it looks good, and it is easy.
Just like before, all you need is an Adafruit-IO key.
With a camera
Run the following commands:
Prompt> sudo ./snap.loop & Prompt> ./snap.REST.IO <your adafruit.io key>
Then from a browser, reach
image.html, in the
You might be interested in this document too, on the same topic, with more options.