Revert "Revert "WWST-40 Philips Hue: Implement device watch""

devicetypes/smartthings/hue-bulb.src/hue-bulb.groovy

@@ -17,6 +17,7 @@ metadata {
 		capability "Switch"
 		capability "Refresh"
 		capability "Sensor"
+		capability "Health Check"
 
 		command "setAdjustedColor"
         command "reset"
@@ -64,6 +65,10 @@ metadata {
 	}
 }
 
+void installed() {
+	sendEvent(name: "checkInterval", value: 60 * 30, data: [protocol: "lan"], displayed: false)
+}
+
 // parse events into attributes
 def parse(description) {
 	log.debug "parse() - $description"
@@ -182,3 +187,7 @@ def verifyPercent(percent) {
         return false
     }
 }
+
+def ping() {
+    log.trace "${parent.ping(this)}"
+}