devices: added trasnmission

src/aare/daq/devices.py

@@ -102,6 +102,12 @@ class BeamlineDevices:
         self.__cryojet_temperature_get = PV(f"{BEAMLINE}-ES-CS:TEMP_RBV")
         self.__cryojet_temperature_set = PV(f"{BEAMLINE}-ES-CS:TEMP.VAL")
 
+        self.__transmission = SetGetPV(
+            name = "transmission",
+            setpv = f"{BEAMLINE}-ES-SSFI:TRANSM-SET",
+            getpv = f"{BEAMLINE}-ES-SSFI:TRANSM-GET"
+        )
+
         self.magnet_position_sensor = PV(f"{BEAMLINE}-ES-DFS:CBOX-CMP1")
         self.magnet_position_sensor_readout = PV(f"{BEAMLINE}-ES-DFS:CBOX-USER1")
         #self.magnet_position_sensor_readout = PV(f"{BEAMLINE}-ES-DFS:CBOX-REFVAL1")
@@ -137,14 +143,15 @@ class BeamlineDevices:
 # Transmission
     @property
     def transmission(self) -> float:
-        return 1.0
+        return self.__transmission.value
 
     @transmission.setter
     def transmission(self, value: float):
         self.set_transmission(value, wait=False)
 
     def set_transmission(self, value: float, /, wait: bool = True):
-        pass
+        logger.warning("Setting Transmission is untested")
+        self.__transmission.move(value, wait=wait)
 
 # Lamp light
     @property