MSA-2184: This app will automatically lock a lock when it is unlocked. There is an adjustable time delay that sets how many seconds to wait before auto-locking. If set to less than 5 seconds, the auto-lock feature is disabled. Works similar to the auto-lock feature on many keypad entry locks, but the time delay is adjustable and can be disabled without having to physically open the lock.

smartapps/spruce-meadows/auto-lock.src/auto-lock.groovy

@@ -0,0 +1,66 @@
+/**
+ *  Lock After Time Delay
+ *
+ *  Copyright 2017 Larry Tillack
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ *  in compliance with the License. You may obtain a copy of the License at:
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software distributed under the License is distributed
+ *  on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License
+ *  for the specific language governing permissions and limitations under the License.
+ *
+ */
+definition(
+    name: "Auto-Lock",
+    namespace: "Spruce Meadows",
+    author: "Larry Tillack",
+    description: "Relocks a lock after a time delay.  If seconds is < 5, then the lock will NOT auto-lock",
+    category: "Convenience",
+    iconUrl: "http://www.tillack.us/smart-apps/icons/doors/autoLock.png",
+    iconX2Url: "http://www.tillack.us/smart-apps/icons/doors/autoLock@2x.png",
+    iconX3Url: "http://www.tillack.us/smart-apps/icons/doors/autoLock@3x.png")
+
+
+preferences {
+	section("Lock this lock") {
+		input "thelock", "capability.lock", required: true
+	}
+    section("Lock after (<5 won't auto-lock)") {
+		input "seconds", "number", required: true, title: "Seconds?"
+	}
+}
+
+def installed() {
+	initialize()
+}
+
+def updated() {
+	unsubscribe()
+	initialize()
+}
+
+def initialize() {
+	subscribe(thelock,"lock.unlocked", lockedHandler)
+}
+
+def lockedHandler(evt) {
+	runIn(seconds, checkLock)
+}
+
+def checkLock() {
+	def lockState = thelock.currentState("lock")
+    
+    if (lockState.value == "unlocked") {
+    	def elapsed = now() - lockState.date.time
+       	def threshold = 1000 * seconds
+        
+        if (threshold >= 5000) {
+			if (elapsed >= threshold) {
+				thelock.lock()
+			}
+		}
+    }
+}