The answer lay here:

https://www.construct.net/en/game-assets/tools/multiplayer-signalling-server-2

I have an existing web-server which provides a web-socket interface and an existing web-app that uses that interface [both of which have been in production for years]. I'm trying to connect a Construct app to it but get this error:

WebSocket connection to 'wss://localhost:3000/data' failed:

The WebSocket plugin has "" for required protocol. It gives close-code of 1006...so, not an error per se but just immediately closing...

Any ideas? Anyone have a working example using WebSockets?

Is it possible for non-Construct apps to connect to the Scirra signaling [multiplayer] server?

If so, are there specs on the protocol, transport, etc.?

That's very helpful...thanks.

If I have a script `c3runtime/lib.js` which has stuff I want to use in my action(s) - how I inject that functionality into my action functions?

Maybe related: how do I access plugin properties from an action function?

Very good, thank you.

Thank you...I got the update and I see the header is set (in dev-tools) but I seem to be in the same spot.

For instance: I open localhost/mod/addon.json in a browser; then bump the version number; then reload - it does not show the new version number.

If I just hit Stop then Start it doesn't update either. However, if I hit Stop then "Test C3 Addon" then I get the new version number...

On the Construct side: is there a way to reload add-ons with restarting the app?

Currently I am using C3IDE. I create a special, lightweight C3 project per plugin.

After I make a change to the plugin I save/close Construct. Then I save & stop/start C3IDE web server. Then, continue.

That seems to be there only way to make changes propagate throughout. Is this the general expectation or is there a better way?

I really like being able to have HTML elements separated per layer. Would an "HTML Elements" mean all my form elements were glommed together? Then you'd have to have separate, concurrent controls for showing/hiding/etc HTML elements that logically coincide with other objects...? Or is there a better pattern you're prescribing?

My use case is a settings screen: one sub-layer for server settings, one for UI settings, etc...

Anyone have any experience using multiple BLE devices in Construct?

Hello...I have one button that is on a disabled, non-interactive sub-layer to toggle fullscreen. I can click this button at any time no matter whether that sub-layer is visible/interactive or not.

Other buttons are not clickable when the layer(s) are invisible/non-interactive. Is this a browser "feature"? Does it have to do with full-screen or some setting on the button itself???

Anyone have experience connecting multiple bluetooth devices?

I have 2 custom devices that I want to connect at the same time. They both work fine individually, but when I connect the 2nd one it doesn't work - only the 1st one works.

It does pull the device_id from each, I have a separate button to initiate the connection to each...but after connecting the first one I get a warning saying this device does not have characteristic ...

Is this a bug or am I missing some setupy thing?