Index: simulator/plugins/treatmentranges/loader.py
===================================================================
diff -u -rf921975179b1c1ad61d841b9db5976c00432fdcc -r341770d5391499aea02f9a840ac96e6562215699
--- simulator/plugins/treatmentranges/loader.py	(.../loader.py)	(revision f921975179b1c1ad61d841b9db5976c00432fdcc)
+++ simulator/plugins/treatmentranges/loader.py	(.../loader.py)	(revision 341770d5391499aea02f9a840ac96e6562215699)
@@ -1,12 +1,18 @@
 """
     The Treatment Ranges ui loader
 """
+# Python
 import os
-from simulator.dynamicloader import DynamicLoader
+# Qt
 from PySide2 import QtWidgets
 from PySide2.QtCore import QTimer
 from PySide2.QtCore import Slot
-from dialin.squish import denaliMessages
+# parent
+from simulator.dynamicloader import DynamicLoader
+# hd Simulator
+from dialin.ui.hd_simulator import HDSimulator
+# plugin specific
+# -- none --
 
 
 class Loader(DynamicLoader):
@@ -24,8 +30,9 @@
     spnUFVolumeMax: QtWidgets.QSpinBox
     sldDurationValue: QtWidgets.QSlider
 
-    def __init__(self):
-        super().__init__(os.path.dirname(__file__))
+    def __init__(self, hd_simulator: HDSimulator):
+        super().__init__(os.path.dirname(__file__), hd_simulator)
+        print(" ---------- ", self.hd_simulator)
 
     def _init_loader(self):
         """
@@ -47,6 +54,7 @@
         :return: none
         """
         self.timer.timeout.connect(self.do_ranges_data)
+        self.timer.timeout.connect(self.do_duration_data)
         self.sldDurationValue.valueChanged.connect(self.do_duration_data)
 
     def _init_widgets(self):
@@ -58,12 +66,15 @@
         self.timer.start(1000)
 
     @Slot()
-    def do_duration_data(self, value):
+    def do_duration_data(self):
         """
         sends the duration message
         :return: none
         """
-        denaliMessages.setTreatmentTime(self.spnDurationMax.value() * 60, value)
+        value = self.sldDurationValue.value()
+        self.hd_simulator.cmd_set_treatment_time(
+            self.spnDurationMax.value() * 60, value
+        )
 
     @Slot()
     def do_ranges_data(self):
@@ -77,7 +88,7 @@
             self.sldDurationValue.setMinimum(duration_min * 60)
             self.sldDurationValue.setMaximum(duration_max * 60)
 
-            denaliMessages.setTreatmentParamRanges(
+            self.hd_simulator.cmd_set_treatment_parameter_ranges(
                 duration_min,
                 duration_max,
                 self.spnUFVolumeMin.value(),