OpenPeripheralsAddons Sensor event

Is there an event we can pull from the OpenPeripheralsAddons Sensor when a player is detected or do we really have to do a fast loop? Also is this documented somewhere or is it like OpenPeripherals?

No there is no event, you have to loop through the entities list.
Yes OpenPeripheral-Addons is like OpenPeripheral, and just like OpenPeripheral you can use the docs program to tell you the methods and their arguments.