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Limitations and notes

The things worth knowing before you commit a design to a customer's site.

Choosing an icon​

The setup app shows the real Crestron glyphs in a searchable, grouped picker — pick the one you want and it appears on the control. A small number of the more obscure icon names have no preview in the app and show as a name chip instead; they still render correctly on the tile. If a name is not a valid Crestron icon the app flags it, because it would otherwise draw blank on the tile.

HTTP requests are bounded​

  • A request times out after at most 30 seconds — a tile must never hang on a slow endpoint. If a device legitimately takes longer than that to respond, it is not something a button press should wait on.
  • Ignore TLS certificate errors exists for LAN gear with a self-signed certificate. Leave it off for anything on the internet — turning it on there defeats the point of TLS.

The activity log is in memory​

The Activity tab holds roughly the last 100 calls and is cleared on a reboot. It is a commissioning and debugging aid, not a permanent audit trail. Nothing is written to disk, and no request log is kept — deliberately, since a request log would eventually hold a secret.

Webhook URLs are secrets​

The webhook token is carried in the URL, so a webhook URL is a credential. Keep it out of anything public, and regenerate the token (Webhooks tab) if one leaks — remembering that regenerating invalidates every URL you have handed out.

Everything is gated on the licence​

An unlicensed driver shows its tile but does nothing: presses, programming actions and inbound webhooks are all inert until a valid licence is active. A licensed site comes back from a reboot licensed on its own — you do not have to re-run the wizard after a power cut.

The setup app and the driver version together​

The setup app ships inside the driver package, so it always matches the driver and works on a site with no outbound internet. The flip side: updating the setup app means updating the driver. Importing a new driver package refreshes the app automatically.

Coexistence during changeover​

The new and previous UI Dynamic drivers can be installed side by side while you migrate a site — they are different drivers. See Migrating from the previous driver.