only do the toggle on > 2.20

Opentrons · Sep 19, 2024 · 7e22b9d · 7e22b9d
1 parent 22998dd
commit 7e22b9d
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/api/src/opentrons/protocol_api/instrument_context.py b/api/src/opentrons/protocol_api/instrument_context.py
@@ -545,14 +545,16 @@ def mix(
             ),
         ):
             self.aspirate(volume, location, rate)
-            auto_presence = self.liquid_presence_detection
-            self.liquid_presence_detection = False
+            if self.api_version >= APIVersion(2, 20):
+                auto_presence = self.liquid_presence_detection
+                self.liquid_presence_detection = False
             while repetitions - 1 > 0:
                 self.dispense(volume, rate=rate, **dispense_kwargs)
                 self.aspirate(volume, rate=rate)
                 repetitions -= 1
             self.dispense(volume, rate=rate)
-            self.liquid_presence_detection = auto_presence
+            if self.api_version >= APIVersion(2, 20):
+                self.liquid_presence_detection = auto_presence
         return self
 
     @requires_version(2, 0)