$HEADER

The GPIO Ultrasound sensor plugIT allows to read the value of an ultra sound sensor as the HC-SR04 and to define a trigger distance.

	Parameters
1	Raspberry PI GPIO pin number connected on the "Trigger" pin of the module.
2	Raspberry PI GPIO pin number connected on the "Echo" pin of the module.
3	Sets the trigger distance for the in and out events.

	Events
In	Sent when the distance less than or equal to the set value.
Out	Sent when the distance is again greater than the set value.
Current distance	Sends current distance in the link parameter.

$FOOTER