fix simulator returns

Opentrons · Nov 18, 2024 · 6c9ddaf · 6c9ddaf
1 parent 2b58d3e
commit 6c9ddaf
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/hardware-testing/hardware_testing/modules/flex_stacker_evt_qc/driver.py b/hardware-testing/hardware_testing/modules/flex_stacker_evt_qc/driver.py
@@ -47,11 +47,13 @@ def build_simulator(cls, port: str = "") -> "FlexStacker":
 
     def __init__(self, port: str, simulating: bool = False) -> None:
         """Constructor."""
-        self._serial = serial.Serial(port, baudrate=STACKER_FREQ)
         self._simulating = simulating
+        if not self._simulating:
+            self._serial = serial.Serial(port, baudrate=STACKER_FREQ)
 
     def _send_and_recv(self, msg: str, guard_ret: str = "") -> str:
         """Internal utility to send a command and receive the response."""
+        assert self._simulating
         self._serial.write(msg.encode())
         ret = self._serial.readline()
         if guard_ret:
@@ -87,4 +89,5 @@ def set_serial_number(self, sn: str) -> None:
 
     def __del__(self) -> None:
         """Close serial port."""
-        self._serial.close()
+        if not self._simulating:
+            self._serial.close()