I use my Pi as an interface to different public APIs, that I access from my phone via Pushbullet.
For example: I send "train details" via Pushbullet and the Pi answers with live information, like arrival time, about my train connections.
The app is based on Node.js. For the communication I use the public pushbullet api.
That's a great use case. Would love to know more about which libraries you use for communication with public api
Thanks! I use the 'request-promise' module for sending the http requests and the 'websocket' module for the pushbullet stream.
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