process ALARM_ACK msg in device state

@@ -291,4 +291,11 @@ class AlarmState {
         }
         return updated;
     }
+
+    public void processAckAlarm(Alarm alarm) {
+        if (currentAlarm != null && currentAlarm.getId().equals(alarm.getId())) {
+            currentAlarm.setStatus(alarm.getStatus());
+            currentAlarm.setAckTs(alarm.getAckTs());
+        }
+    }
 }

@@ -140,6 +140,8 @@ class DeviceState {
             stateChanged = processAttributesDeleteNotification(ctx, msg);
         } else if (msg.getType().equals(DataConstants.ALARM_CLEAR)) {
             stateChanged = processAlarmClearNotification(ctx, msg);
+        } else if (msg.getType().equals(DataConstants.ALARM_ACK)) {
+            processAlarmAckNotification(ctx, msg);
         } else {
             ctx.tellSuccess(msg);
         }
@@ -161,6 +163,16 @@ class DeviceState {
         return stateChanged;
     }
 
+    private void processAlarmAckNotification(TbContext ctx, TbMsg msg) {
+        Alarm alarmNf = JacksonUtil.fromString(msg.getData(), Alarm.class);
+        for (DeviceProfileAlarm alarm : deviceProfile.getAlarmSettings()) {
+            AlarmState alarmState = alarmStates.computeIfAbsent(alarm.getId(),
+                    a -> new AlarmState(this.deviceProfile, deviceId, alarm, getOrInitPersistedAlarmState(alarm)));
+            alarmState.processAckAlarm(alarmNf);
+        }
+        ctx.tellSuccess(msg);
+    }
+
     private boolean processAttributesUpdateNotification(TbContext ctx, TbMsg msg) throws ExecutionException, InterruptedException {
         Set<AttributeKvEntry> attributes = JsonConverter.convertToAttributes(new JsonParser().parse(msg.getData()));
         String scope = msg.getMetaData().getValue("scope");