icon <uuid>
Any active device (see preamble at top of light bus article) may send this message to the HUD device to change its appearance on the HUD.

<uuid> should be the UUID of a texture icon to use, ideally a 32x32 pixel image or larger that has been designed to look good at 16x16 pixels, and consists of only white, transparent, and translucent white pixels.

Only works if using Native 8.6.3 and later. Builds before Oct 6, 2021 do not support this feature. Screen does not support this feature (see add-section instead.)

icon messages should generally be sent in response to the icon-q message, back to the key that sent the icon-q message. You can also determine the correct target for this message by sending devices to the controller.