Index: TD_Pressures/loader.py
===================================================================
diff -u -r03501309d607343ba120663e0abce74faeb34f59 -r2127613b536bd68ebbcec1923b5b31d95234be0c
--- TD_Pressures/loader.py	(.../loader.py)	(revision 03501309d607343ba120663e0abce74faeb34f59)
+++ TD_Pressures/loader.py	(.../loader.py)	(revision 2127613b536bd68ebbcec1923b5b31d95234be0c)
@@ -13,6 +13,9 @@
 
 # Plugin specific
 from leahi_dialin.ui.common import Ranges
+from leahi_dialin.protocols       import CAN
+from leahi_dialin.common.msg_defs import MsgIds
+from leahi_dialin.utils           import conversions
 
 # hd Simulator
 from leahi_dialin.ui.td_messaging import TD_Messaging
@@ -25,7 +28,12 @@
 
     def __init__(self):
         self.td_interface = TD_Messaging()
+        self.can_interface = self.td_interface.can_interface
         super().__init__(os.path.dirname(__file__))
+        if self.can_interface is not None:
+            self.can_interface.register_receiving_publication_function(CAN.DenaliChannels.ui_to_td_ch_id,
+                                                                       MsgIds.MSG_ID_UI_PRESSURE_LIMIT_WIDEN_REQUEST.value,
+                                                                       self.handle_pressures_widen_request)
 
     def _init_loader(self):
         """
@@ -59,7 +67,11 @@
         self.sldTMPValue                = self.find_widget(QtWidgets.QSlider        ,'sldTMPValue'          )
 
         self.spnLimitState              = self.find_widget(QtWidgets.QSpinBox       ,'spnLimitState'        )   
+        self.tbPressureWidenSend        = self.find_widget(QtWidgets.QToolButton    ,'tbPressuresWidenSend' )
+        self.spnPressureWidenRejection  = self.find_widget(QtWidgets.QSpinBox       ,'PressuresWidenReasonSpinBox'  ) 
+        self.lblPressureWidenReq        = self.find_widget(QtWidgets.QLabel         ,'lbPressureWidenRequest'       )
 
+
         self.lblArterialTitle       .setText    (f"{self.lblArterialTitle   .text()} [{Ranges.ARTERIAL_PRESSURE_MINIMUM},{Ranges.ARTERIAL_PRESSURE_MAXIMUM}]" )
         self.lblVenousTitle         .setText    (f"{self.lblVenousTitle     .text()} [{Ranges.VENOUS_PRESSURE_MINIMUM},{Ranges.VENOUS_PRESSURE_MAXIMUM}]"     )
         self.lblTMPTitle            .setText    (f"{self.lblTMPTitle        .text()} [{Ranges.TMP_PRESSURE_MINIMUM},{Ranges.TMP_PRESSURE_MAXIMUM}]"           )
@@ -118,6 +130,8 @@
         self.spnTMPLimitHigh        .setValue   (Ranges.TMP_PRESSURE_HIGH_DEF)
 
         self.spnLimitState          .setValue(0)
+        self.spnPressureWidenRejection.setValue(0)
+        self.lblPressureWidenReq.setText("-")
 
     
     def _init_connections(self):
@@ -143,8 +157,10 @@
         self.spnTMPLimitHigh        .valueChanged.connect(self.do_pressures_data)
 
         self.spnLimitState          .valueChanged.connect(self.do_pressures_data)
+        self.tbPressureWidenSend    .clicked.connect(self.do_pressures_widen_response)
 
 
+
     @Slot()
     def do_pressures_data(self):
         """
@@ -177,4 +193,20 @@
             tmp_pressure          ,
             tmp_min               ,
             tmp_max               
-        )
\ No newline at end of file
+        )
+
+
+    @Slot()
+    def handle_pressures_widen_request(self, message, timestamp = 0.0):
+        """
+        Called when the user requests to firmware from UI
+        @return: None
+        """
+        self.lblPressureWidenReq.setText("Requested")
+
+
+    @Slot()
+    def do_pressures_widen_response(self):
+        self.lblPressureWidenReq.setText("-")
+        reason      = self.spnPressureWidenRejection.value()
+        self.td_interface.td_pressures_widen_adjustment_response(reason)
\ No newline at end of file