Get gateway firmware at every update

Author: bouwew

plugwise/helper.py

@@ -273,7 +273,8 @@ def _appliance_info_finder(self, appl: Munch, appliance: etree.Element) -> Munch
     def _appl_gateway_info(self, appl: Munch, appliance: etree.Element) -> Munch:
         """Helper-function for _appliance_info_finder()."""
         self._gateway_id = appl.entity_id
-        appl.firmware = str(self.smile.version)
+        locator = "./gateway/firmware_version"
+        appl.firmware = self._domain_objects.find(locator).text
         appl.hardware = self.smile.hw_version
         appl.mac = self.smile.mac_address
         appl.model = self.smile.model