Need feedback when user enters ThingsBoard parameters

[mhlmhl]

The "Iot Hub (ThingsBoard) / ThingsBoard Parameters" setup screen gives no feedback when the user enters the parameters. See attached image.

Current experience: user enters 3 fields (URL, port, access token) and hits submit. All three fields are then blanked out with no indication whether the entered data is correct or not.

• UI should give feedback indicating success (ability to connect to TB with supplied parameters) or failure.
• Ideally, the UI should indicate which field is wrong, e.g. by outlining it in red. This may not be possible in the case of a timeout, but it might be possible to distinguish particular errors, such as DNS failure when looking up the server URL.
• Rather than automatically blanking out all three fields, it would be much kinder to users if they previously-entered parameters are left unchanged so that the user can just correct the fields that are wrong.
• I'm told that the UI automatically defaults the port if left blank. That should be noted on the screen.

[glossyio]

I agree- This would be worth taking a look at again. Some thoughts:

• This should more tightly be integrated with the node-red-project/environment file. Perhaps we should only handle these variables through the environment file, similar to Frigate's config?
• Right now we're only using ThingsBoard HTTP APIs, but we should plan to have variables for MQTT APIs, too. So, we'll need port designations for both.
• We'd also need a fleshed out UX, pre-filled fields, etc.
• Agree on test/success/failure indicator for it.

Maybe we handle this as we move towards Node-RED Dashboard-2? Since node-red-dashboard is deprecated.