Better management of obsolete device

plugin.py

@@ -257,7 +257,7 @@ class BasePlugin:
                         product_key = device['product_key']
                         alias = device['dev_alias']
                         did = device['did']
-                        self.did[product_key] = {"did":did, "alias":alias}
+                        self.did[product_key] = {"did":did, "alias":alias, "updated_at":0}
                         Domoticz.Status(f"Devide Id from Heatzy API: {alias} - {did}")
                         unit = unit + 1
 
@@ -298,19 +298,22 @@ class BasePlugin:
                     #Domoticz.Error("Headers: " + str(headers))
                     if 'response' in locals() and response != "":
                         Domoticz.Error("Response: " + str(response))
-                return ""
+                return
 
             Domoticz.Debug("Get Mode Response:" + str(response))
 
             #Last Update
             if 'updated_at' in response:
                 obsolete_min = int((time.time() - response["updated_at"])//60)
-                if obsolete_min >= 180:
-                    if Devices[deviceid].TimedOut == 0:
+                if response["updated_at"] == device["updated_at"]:
+                    #No update since last heartbeat
+                    if obsolete_min >= 180 and Devices[deviceid].TimedOut == 0:
                         Domoticz.Status(f"Last update from '{alias}' was {obsolete_min} min earlier.")
                         Devices[deviceid].TimedOut = 1
                     return
-                elif Devices[deviceid].TimedOut == 1:
+                device["updated_at"] = response["updated_at"]
+
+                if Devices[deviceid].TimedOut == 1:
                     Domoticz.Status(f"'{alias}' is now back.")
                     Devices[deviceid].TimedOut = 0