diff --git a/src/nqrduck_autotm/controller.py b/src/nqrduck_autotm/controller.py
index 288d714..35b5bca 100644
--- a/src/nqrduck_autotm/controller.py
+++ b/src/nqrduck_autotm/controller.py
@@ -273,4 +273,42 @@ class AutoTMController(ModuleController):
             data = json.load(f)
             self.module.model.short_calibration = S11Data.from_json(data["short"])
             self.module.model.open_calibration = S11Data.from_json(data["open"])
-            self.module.model.load_calibration = S11Data.from_json(data["load"])
\ No newline at end of file
+            self.module.model.load_calibration = S11Data.from_json(data["load"])
+
+    def set_voltages(self, tuning_voltage : str, matching_voltage : str) -> None:
+        """This method is called when the set voltages button is pressed.
+        It writes the specified tuning and matching voltage to the serial connection.
+        
+        Args:
+            tuning_voltage (str): The tuning voltage in V.
+            matching_voltage (str): The matching voltage in V.
+        """
+        logger.debug("Setting voltages")
+        MAX_VOLTAGE = 5 # V
+        try:
+            tuning_voltage = float(tuning_voltage)
+            matching_voltage = float(matching_voltage)
+        except ValueError:
+            error = "Could not set voltages. Tuning and matching voltage must be floats"
+            logger.error(error)
+            self.module.view.add_info_text(error)
+            return
+        
+        if tuning_voltage < 0 or matching_voltage < 0:
+            error = "Could not set voltages. Tuning and matching voltage must be positive"
+            logger.error(error)
+            self.module.view.add_info_text(error)
+            return
+        
+        if tuning_voltage > MAX_VOLTAGE or matching_voltage > MAX_VOLTAGE:
+            error = "Could not set voltages. Tuning and matching voltage must be between 0 and 5 V"
+            logger.error(error)
+            self.module.view.add_info_text(error)
+            return
+        
+        logger.debug("Setting tuning voltage to %s V and matching voltage to %s V", tuning_voltage, matching_voltage)
+        try:
+            command = "v%sv%s" % (matching_voltage, tuning_voltage)
+            self.module.model.serial.write(command.encode('utf-8'))
+        except AttributeError:
+            logger.error("Could not set voltages. No device connected.")
diff --git a/src/nqrduck_autotm/resources/autotm_widget.ui b/src/nqrduck_autotm/resources/autotm_widget.ui
index 16d3e3c..4e02f66 100644
--- a/src/nqrduck_autotm/resources/autotm_widget.ui
+++ b/src/nqrduck_autotm/resources/autotm_widget.ui
@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>1280</width>
-    <height>645</height>
+    <height>705</height>
    </rect>
   </property>
   <property name="sizePolicy">
@@ -118,7 +118,7 @@
           <widget class="QDoubleSpinBox" name="matchingBox"/>
          </item>
          <item row="2" column="0" colspan="2">
-          <widget class="QPushButton" name="pushButton_2">
+          <widget class="QPushButton" name="setvoltagesButton">
            <property name="text">
             <string>Set Voltages</string>
            </property>
diff --git a/src/nqrduck_autotm/view.py b/src/nqrduck_autotm/view.py
index 8643bf2..280cb69 100644
--- a/src/nqrduck_autotm/view.py
+++ b/src/nqrduck_autotm/view.py
@@ -44,6 +44,12 @@ class AutoTMView(ModuleView):
             self._ui_form.stopEdit.text()
         ))
 
+        # On clicking of the setvoltagesButton call the set_voltages method
+        self._ui_form.setvoltagesButton.clicked.connect(lambda: self.module.controller.set_voltages(
+            self._ui_form.tuningBox.text(),
+            self._ui_form.matchingBox.text()
+        ))
+
         # On clicking of the calibration button call the on_calibration_button_clicked method
         self._ui_form.calibrationButton.clicked.connect(self.on_calibration_button_clicked)
 
@@ -177,8 +183,6 @@ class AutoTMView(ModuleView):
         phase_ax.set_ylim(-180, 180)
         phase_ax.invert_yaxis()
 
-        
-        
         magnitude_ax.set_xlabel("Frequency (MHz)")
         magnitude_ax.set_ylabel("S11 (dB)")
         magnitude_ax.set_title("S11")
diff --git a/src/nqrduck_autotm/widget.py b/src/nqrduck_autotm/widget.py
index 13fcc0a..0bd74f6 100644
--- a/src/nqrduck_autotm/widget.py
+++ b/src/nqrduck_autotm/widget.py
@@ -12,7 +12,7 @@ from PyQt6 import QtCore, QtGui, QtWidgets
 class Ui_Form(object):
     def setupUi(self, Form):
         Form.setObjectName("Form")
-        Form.resize(1280, 645)
+        Form.resize(1280, 705)
         sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.Preferred, QtWidgets.QSizePolicy.Policy.Preferred)
         sizePolicy.setHorizontalStretch(0)
         sizePolicy.setVerticalStretch(0)
@@ -75,9 +75,9 @@ class Ui_Form(object):
         self.matchingBox = QtWidgets.QDoubleSpinBox(parent=self.elecTab)
         self.matchingBox.setObjectName("matchingBox")
         self.gridLayout_3.addWidget(self.matchingBox, 1, 1, 1, 1)
-        self.pushButton_2 = QtWidgets.QPushButton(parent=self.elecTab)
-        self.pushButton_2.setObjectName("pushButton_2")
-        self.gridLayout_3.addWidget(self.pushButton_2, 2, 0, 1, 2)
+        self.setvoltagesButton = QtWidgets.QPushButton(parent=self.elecTab)
+        self.setvoltagesButton.setObjectName("setvoltagesButton")
+        self.gridLayout_3.addWidget(self.setvoltagesButton, 2, 0, 1, 2)
         self.tuningBox = QtWidgets.QDoubleSpinBox(parent=self.elecTab)
         self.tuningBox.setObjectName("tuningBox")
         self.gridLayout_3.addWidget(self.tuningBox, 0, 1, 1, 1)
@@ -176,7 +176,7 @@ class Ui_Form(object):
         self.titletypeLabel.setText(_translate("Form", "T&M Type:"))
         self.pushButton.setText(_translate("Form", "Homing"))
         self.typeTab.setTabText(self.typeTab.indexOf(self.mechTab), _translate("Form", "Mechanical"))
-        self.pushButton_2.setText(_translate("Form", "Set Voltages"))
+        self.setvoltagesButton.setText(_translate("Form", "Set Voltages"))
         self.label_3.setText(_translate("Form", "Voltage Matching"))
         self.label_2.setText(_translate("Form", "Voltage Tuning"))
         self.label_4.setText(_translate("Form", "Voltage Resolution"))