add small timeout after loading, we should not send any messages to t…

…he control box in this timeframe

duotecno/controller.py

@@ -134,6 +134,7 @@ async def _do_connect(self, testOnly: bool = False, skipLoad: bool = False) -> N
                 for unit in node.get_units():
                     self._log.debug(f"Unit: {unit}")
                     await unit.requestStatus()
+        await asyncio.sleep(5)
         self.hbTask = asyncio.Task(self.heartbeatTask())
         await self.enableAllUnits()