I’ve been using Java Processing for some while, now tried the p5.js examples on Windows and RPi.
I’d like to be able to make a p5.js application on the RPi that auto-runs separately from the IDE, has a static url (not random :8xxx port), and comms to a backend. For the comms to backend I keep finding mention of websockets and node.js, but no simple get-going guide.
I’ve always had a lot of luck following the @shiffman tutorials, and there are a few on this sort of thing. Here is a node/sockets one: https://youtu.be/bjULmG8fqc8
Thanks @bmoren and @matthewjohnjamieson. I’ve copied the video and web examples, then a few of my own. It’s all good stuff.
One issue I have, is that the sketch examples refer to the host as localhost or 127.0.0.1 which is all good while everything is on one PC. Now I have server on RPi and web-page on PC or phone I put the server’s current IP address in the code. Is there a way for the web-page to get the server’s IP address?
If this is only on your local network (LAN), then you can make your rPI have a static IP on that network, that way it shouldn’t change and you can just memorise the IP on all the other machines
Yes, simply having static address works fine at home, but we also go to e.g. code-clubs. Anyway, at one of these events I met someone who knew the answer: socket = io.connect(location.host);
the connect/io argument is a 'url' *(String)* (defaults to 'window.location' )
let socket = io.connect(); should get you connected to window.location which should work flawlessly if you’re serving out your express and socket setup on the same port and url/ip