ENH: added error catching when address is wrong

motor_stage_ui/PIStagesInterface.py

@@ -69,6 +69,9 @@ def _read(self):
             .decode()
             .strip(self._terminator)
         )
+        if msg == "":
+            self.log.error("No responds from motor controller.")
+            raise ValueError
         return msg
 
     def _write_read(self, command: str, address: int = None):
@@ -276,8 +279,16 @@ def _get_position(self, address: int) -> None:
         Returns:
             int: current position of motorstage in integer step sizes
         """
-        msg = self._write_read("TP", address)[3:].replace("+", "").replace(":", "")
-        return int(msg)
+        try:
+            msg = int(
+                self._write_read("TP", address)[3:].replace("+", "").replace(":", "")
+            )
+        except ValueError:
+            self.log.error(
+                "Invalid motor stage responds:, check addresses, baudrate..."
+            )
+            raise ValueError
+        return msg
 
     def _calculate_value(
         self, amount: str, unit: str, stage: str, step_size: float

motor_stage_ui/motor_stage_gui.py

@@ -210,7 +210,7 @@ def motor_gui(
             name (int, optional): Name of the motorstage. Defaults to 1.
         """
         name = QLineEdit(text=name, parent=self)
-        name.move(0, (address - 1) * 30 + 20)
+        name.move(0, index * 30 + 20)
         name.resize(100, 30)
         name.setAlignment(Qt.AlignCenter)