reachable_state_updated – gets sent if a ZWave device reachable state has been changed 
				
					{
    event = "reachable_state_updated",
    node_id = 2,
    value = true
}
fields type description
event string type of an event
node_id int a unique id of a ZWave device within a Zwave network
value bool true if ZWave device is reachable, false otherwise