Fix Ecobee access_token doesn't get refresh after it's expired

devicetypes/smartthings/ecobee-sensor.src/ecobee-sensor.groovy

@@ -64,3 +64,8 @@ void poll() {
 	log.debug "Executing 'poll' using parent SmartApp"
 	parent.pollChildren(this)
 }
+
+//generate custom mobile activity feeds event
+def generateActivityFeedsEvent(notificationMessage) {
+	sendEvent(name: "notificationMessage", value: "$device.displayName $notificationMessage", descriptionText: "$device.displayName $notificationMessage", displayed: true)
+}

devicetypes/smartthings/ecobee-thermostat.src/ecobee-thermostat.groovy

@@ -676,3 +676,8 @@ def generateStatusEvent() {
 	log.debug "Generate Status Event = ${statusText}"
 	sendEvent("name":"thermostatStatus", "value":statusText, "description":statusText, displayed: true)
 }
+
+//generate custom mobile activity feeds event
+def generateActivityFeedsEvent(notificationMessage) {
+	sendEvent(name: "notificationMessage", value: "$device.displayName $notificationMessage", descriptionText: "$device.displayName $notificationMessage", displayed: true)
+}

smartapps/smartthings/ecobee-connect.src/ecobee-connect.groovy

@@ -236,6 +236,7 @@ def getEcobeeThermostats() {
 	]
 
 	def stats = [:]
+    try {
         httpGet(deviceListParams) { resp ->
 
             if (resp.status == 200) {
@@ -257,6 +258,10 @@ def getEcobeeThermostats() {
                 }
             }
         }
+    } catch(Exception e) {
+        log.debug "___exception getEcobeeThermostats(): " + e
+        refreshAuthToken()
+    }
 	atomicState.thermostats = stats
 	return stats
 }
@@ -338,22 +343,19 @@ def initialize() {
 
 	atomicState.thermostatData = [:] //reset Map to store thermostat data
 
+    //send activity feeds to tell that device is connected
+    def notificationMessage = "is connected to SmartThings"
+    sendActivityFeeds(notificationMessage)
+    state.timeSendPush = null
+
 	pollHandler() //first time polling data data from thermostat
 
 	//automatically update devices status every 5 mins
 	runEvery5Minutes("poll")
 
-}
+    //since access_token expires every 2 hours
+    runEvery1Hour("refreshAuthToken")
 
-def uninstalled() {
-	log.info("Uninstalling, removing child devices...")
-	removeChildDevices(getChildDevices())
-}
-
-private removeChildDevices(delete) {
-	delete.each {
-		deleteChildDevice(it.deviceNetworkId)
-	}
 }
 
 def pollHandler() {
@@ -594,6 +596,7 @@ private refreshAuthToken() {
 
         log.debug refreshParams
 
+        def notificationMessage = "is disconnected from SmartThings, because the access credential changed or was lost. Please go to the Ecobee (Connect) SmartApp and re-enter your account login credentials."
         //changed to httpPost
         try {
             def jsonMap
@@ -635,7 +638,10 @@ private refreshAuthToken() {
                 }
             }
         } catch(Exception e) {
-			log.debug "caught exception refreshing auth token: " + e
+            log.error "refreshAuthToken() >> Error: e.statusCode ${e.statusCode}"
+            if (e.statusCode == 401) {
+                sendPushAndFeeds(notificationMessage)
+            }
         }
     }
 }
@@ -727,7 +733,7 @@ def sendJson(child = null, String jsonBody) {
 	} catch(Exception e) {
 		log.debug "Exception Sending Json: " + e
 		debugEvent ("Exception Sending JSON: " + e)
-//        debugEventFromParent(child, "Exception Sending JSON: " + e)
+        refreshAuthToken()
 		return false
 	}
 
@@ -761,3 +767,28 @@ def debugEvent(message, displayEvent = false) {
 def debugEventFromParent(child, message) {
 	if (child != null) { child.sendEvent("name":"debugEventFromParent", "value":message, "description":message, displayed: true, isStateChange: true)}
 }
+
+//send both push notification and mobile activity feeds
+def sendPushAndFeeds(notificationMessage){
+    log.warn "sendPushAndFeeds >> notificationMessage: ${notificationMessage}"
+    log.warn "sendPushAndFeeds >> atomicState.timeSendPush: ${atomicState.timeSendPush}"
+    if (atomicState.timeSendPush){
+        if (now() - atomicState.timeSendPush > 86400000){ // notification is sent to remind user once a day
+            sendPush("Your Ecobee thermostat " + notificationMessage)
+            sendActivityFeeds(notificationMessage)
+            atomicState.timeSendPush = now()
+        }
+    } else {
+        sendPush("Your Ecobee thermostat " + notificationMessage)
+        sendActivityFeeds(notificationMessage)
+        atomicState.timeSendPush = now()
+    }
+    atomicState.authToken = null
+}
+
+def sendActivityFeeds(notificationMessage) {
+    def devices = getChildDevices()
+    devices.each { child ->
+        child.generateActivityFeedsEvent(notificationMessage) //parse received message from parent
+    }
+}