MagTarget provides a Meeting Room Management Way-Finder Solution for Android, iPad Mini, Air, new iPad & iPad Pro, which relies on a series of beeps and tones to control status LEDs for a connected case.
You can read more here: https://magtarget.com/collections/visualtarget
The end result is, when the integration is enabled, the lights change from Red to Green based on the availability status of the display.
Setup
You will need to create two Advanced Configuration editor keys to enable tone playback, which triggers LED status light changes on a connected MagTarget case.
occupiedTone: 4645
availableTone: 4125
Testing your Hardware
You can set up a test page on your device to see if your hardware works.
Just navigate to the test URL on any browser, and connect your device. You will need to allow audio playback, if prompted.