Device prop subscribe

Description

device_prop_subscribe(prop_name, callback)
device_prop_subscribe(device_id, prop_name, callback)

device_prop_subscribe is used to subscribe to a property for a device. Available properties depend on the device type. A callback is called when the property changes value.

See Device list for available properties.

Return value

This function won't return a value.

Arguments

#	Argument	Type	Description
1	device_id	id	(Optional) Device id. This can be obtained through Device_add function. Not needed when starting script within Device plugin.
2	prop_name	String	Property name which need to be set. See the Device list for available properties.
3	callback	function	Function that is called when property value changes. First argument contains the data.

Example

-- Subscribe to property
device_prop_subscribe("PROP_NAME", function(data)
  print("got " .. tostring(data) )
)