diff --git a/GreengrassAwareConnection.py b/GreengrassAwareConnection.py
index b3e6941..3b92376 100644
--- a/GreengrassAwareConnection.py
+++ b/GreengrassAwareConnection.py
@@ -13,9 +13,7 @@
 
 from AWSIoTPythonSDK.core.greengrass.discovery.providers import DiscoveryInfoProvider
 from AWSIoTPythonSDK.core.protocol.connection.cores import ProgressiveBackOffCore
-# from AWSIoTPythonSDK.MQTTLib import AWSIoTMQTTClient
 from AWSIoTPythonSDK.exception.AWSIoTExceptions import DiscoveryInvalidRequestException
-# from AWSIoTPythonSDK.MQTTLib import AWSIoTMQTTShadowClient
 
 from AWSIoTPythonSDK.MQTTLib import *
 
@@ -33,6 +31,7 @@ def shadowDelete_callback(payload, responseStatus, token):
 class GreengrassAwareConnection:
     MAX_DISCOVERY_RETRIES = 10
     GROUP_CA_PATH = "./groupCA/"
+    OFFLINE_QUEUE_DEPTH = 100
 
     def __init__(self, host, rootCA, cert, key, thingName):
         self.logger = logging.getLogger("GreengrassAwareConnection")
@@ -162,8 +161,7 @@ def connectShadow(self):
         self.shadowClient.configureConnectDisconnectTimeout(10)  # 10 sec
         self.shadowClient.configureMQTTOperationTimeout(5)  # 5 sec
 
-        self.shadowClient._AWSIoTMQTTClient.configureOfflinePublishQueueing(20, DROP_OLDEST)
-
+        self.shadowClient._AWSIoTMQTTClient.configureOfflinePublishQueueing(self.OFFLINE_QUEUE_DEPTH, DROP_OLDEST)
 
         self.shadowClient.connect()
 
@@ -180,7 +178,7 @@ def updateShadow(self, update):
         state = {'state': {
                     'reported': update
         }}
-        self.deviceShadowHandler.shadowUpdate(json.dumps(state), shadowUpdate_callback, 5)
+        self.deviceShadowHandler.shadowUpdate(json.dumps(state), shadowUpdate_callback, 10)
 
 
 
diff --git a/Observer.py b/Observer.py
index d7b1dc6..568a090 100644
--- a/Observer.py
+++ b/Observer.py
@@ -47,6 +47,26 @@ def notifyObservers(self, arg = None):
             pass
 
 
+def mkObs(cls):
+    class Wrapper(cls):
+        def __init__(self, x=None):
+            print(f"init wrapper with {x}")
+            super().__init__(x)
+            # self.wrap = cls(x)
+            # print(f'wrap is {self.wrap}')
+            self.dirty = False
+
+        def __setitem__(self, key, item):
+            print(f'set item: {key}:{item}')
+            # self.wrap.__setitem__(key, item)
+            super().__setitem__(key, item)
+            self.dirty = True
+            print(f'{self.dirty}')
+            
+    return Wrapper
+
+
+
 # an observable chunk of raw data from the serial port, or a file, or ?
 class ObservableString(Observable):
     def __init__(self):
diff --git a/pentair-control.py b/pentair-control.py
index fbdee54..ff831d5 100755
--- a/pentair-control.py
+++ b/pentair-control.py
@@ -173,7 +173,7 @@ def update(self, objects):
 try:
     iotConnection = GreengrassAwareConnection(host, rootCA, cert, key, thingName)
 
-    # iotConnection.deleteShadow()
+    iotConnection.deleteShadow()
 except Exception as e:
     logger.error(f'{str(type(e))} Error')
 
@@ -182,7 +182,7 @@ def update(self, objects):
     frames.addObserver(publisher)
 
 
-def do_something(last_update = {}):
+def do_something():
     if not connection.isOpen():
         connection.open()
 
@@ -192,30 +192,47 @@ def do_something(last_update = {}):
     for k in ['hour', 'min', 'dow', 'day', 'month', 'year', 'adjust', 'dst']:
         if k in accState:
             accState.pop(k)
-
-    if accState != last_update:
-        stateMessage = json.dumps(accState)
-        logger.info(stateMessage)
-        iotConnection.updateShadow(accState)
-        last_update = accState
-    # iotConnection.publishMessageOnTopic(stateMessage, thingName + '/t')
+    
+    # segregate immutable properties to a telemetry update
+    telemetry = {}
+    # for k in ['airTemp', 'solarTemp', 'spaTemp', 'tempUnits', 'timeout', 'waterTemp', 'pumpRPM', 'pumpWatts']:
+    #     if k in accState:
+    #         telemetry[k] = accState.pop(k)
+
+    if len(accState) > 0:
+        try:
+            stateMessage = json.dumps(accState)
+            logger.info(stateMessage)
+            iotConnection.updateShadow(accState)
+        except Exception as e:
+            logger.warn("Exception updating Shadow " + e)
+
+    if len(telemetry) > 0:
+        try:
+            telemetryMessage = json.dumps(telemetry)
+            logger.info(telemetryMessage)
+            iotConnection.publishMessageOnTopic(telemetryMessage, thingName + '/t')
+        except Exception as e:
+            logger.warn("Exception sending telemetry " + e)
 
     stats = json.dumps(protocol.getStats())
-    logger.info(stats + "\n")
-    iotConnection.publishMessageOnTopic(stats, thingName + '/s')
-    
+    if len(stats) > 0:
+        try:
+            logger.info(stats + "\n")
+            iotConnection.publishMessageOnTopic(stats, thingName + '/s')
+        except Exception as e:
+            logger.warn("Exception sending stats " + e)
+
     protocol.resetStats()
 
-    return last_update
 
 def run():
     if not connection.isOpen():
         connection.open()
 
-    last_update = {}
     while True:
-        time.sleep(0.9*timeout)         # crude approach to timing adjustment
-        last_update = do_something(last_update)
+        time.sleep(timeout)         # crude approach to timing adjustment
+        do_something()
 
 if __name__ == "__main__":