Tested magnetometer calibration method.

src/socket_control.py

@@ -98,8 +98,13 @@ class ClientConnectionThread(Thread):
                         msg = ''
                     else:
                         msg += char
-            except ConnectionResetError:
+            except ConnectionResetError as e:
                 ui_print("A connection was closed by the client.")
+                self.client_socket.close()
+                if self._cage_dev:
+                    self._cage_dev.close()
+                g.MAGNETOMETER.connected = False
+                return
 
     def handle_msg(self, message):
         """ Executes command logic and returns string response (for client). """