fix timer cleanup

app/src/gen3/talent.py

@@ -77,13 +77,13 @@ class Talent(Message):
     '''
     def close(self) -> None:
         logging.debug('Talent.close()')
-        # we have refernces to methods of this class in self.switch
+        # we have references to methods of this class in self.switch
         # so we have to erase self.switch, otherwise this instance can't be
         # deallocated by the garbage collector ==> we get a memory leak
         self.switch.clear()
         self.log_lvl.clear()
         self.state = State.closed
-        del self.mb_timer
+        self.mb_timer.close()
         super().close()
 
     def __set_serial_no(self, serial_no: str):

app/src/gen3plus/solarman_v5.py

@@ -134,13 +134,13 @@ class SolarmanV5(Message):
     '''
     def close(self) -> None:
         logging.debug('Solarman.close()')
-        # we have refernces to methods of this class in self.switch
+        # we have references to methods of this class in self.switch
         # so we have to erase self.switch, otherwise this instance can't be
         # deallocated by the garbage collector ==> we get a memory leak
         self.switch.clear()
         self.log_lvl.clear()
         self.state = State.closed
-        del self.mb_timer
+        self.mb_timer.close()
         super().close()
 
     def __set_serial_no(self, snr: int):

app/src/my_timer.py

@@ -30,6 +30,6 @@ class Timer:
         logging.debug(f'[{self.id_str}]Timer expired')
         self.__timeout_cb(next(self.exp_count))
 
-    def __del__(self) -> None:
+    def close(self) -> None:
         self.stop()
         self.__timeout_cb = None