diff --git a/readme.md b/readme.md
index ce02a75..64bdca5 100644
--- a/readme.md
+++ b/readme.md
@@ -78,6 +78,9 @@ Falls Sie die Datenbank lokal testen möchten, starten Sie Docker Compose im Pro
 docker-compose up -d
 ```
 
+### 4. Software für USB Relay Board installieren
+https://github.com/scheiber-sa/sainsmartUsbRelay
+
 ## Anwendung
 
 ### Programmstart
diff --git a/workflow.py b/workflow.py
index f657a54..c143130 100644
--- a/workflow.py
+++ b/workflow.py
@@ -29,7 +29,7 @@ import cv2
 import os
 
 import lib.sainsmartrelay as sainsmartrelay
-
+import lib.wledControl as wledControl
 
 db_config = {
     'user': 'dbUser',
@@ -456,7 +456,7 @@ class Ui_MainWindow(object):
         self.graphicsView.setGeometry(QtCore.QRect(10, int(1080/2), 661, int(480*1.05))) # position and size of camera frame # int(640*1.05)
         self.graphicsView.setObjectName("graphicsView")
 
-        # relay control
+        # relay control buttons
         self.startSpotlightBtn = QtWidgets.QPushButton(self.centralwidget)
         self.startSpotlightBtn.setGeometry(QtCore.QRect(700+200, int(1080/2)+100, 161, 25)) #int(1080/2)+100
         self.startSpotlightBtn.setObjectName("startSpotlightBtn")
@@ -464,6 +464,18 @@ class Ui_MainWindow(object):
         self.stopSpotlightBtn.setGeometry(QtCore.QRect(700+200, int(1080/2)+150, 161, 25))
         self.stopSpotlightBtn.setObjectName("stopSpotlightBtn")
 
+        # led control buttons
+        self.redLightBtn = QtWidgets.QPushButton(self.centralwidget)
+        self.redLightBtn.setGeometry(QtCore.QRect(700+200, int(1080/2)+200, 161, 25))
+        self.yellowLightBtn = QtWidgets.QPushButton(self.centralwidget)
+        self.yellowLightBtn.setGeometry(QtCore.QRect(700+200, int(1080/2)+250, 161, 25))
+        self.greenLightBtn = QtWidgets.QPushButton(self.centralwidget)
+        self.greenLightBtn.setGeometry(QtCore.QRect(700+200, int(1080/2)+300, 161, 25))
+        self.offLightBtn = QtWidgets.QPushButton(self.centralwidget)
+        self.offLightBtn.setGeometry(QtCore.QRect(700+200, int(1080/2)+350, 161, 25))
+        self.blinkLightBtn = QtWidgets.QPushButton(self.centralwidget)
+        self.blinkLightBtn.setGeometry(QtCore.QRect(700+200, int(1080/2)+400, 161, 25))
+
         #self.myTestLambda = lambda: self.worker.checkWaageStartSignal.emit(einzelteilID, self.teileZuViel, self.auftragsnummer)
         
         '''
@@ -567,10 +579,16 @@ class Ui_MainWindow(object):
         # self.camWorkFlowcheckBox.clicked.connect(self.onCheckboxCheck)
         self.modelComboBox
 
-        # relay control
+        # relay control buttons
         self.startSpotlightBtn.setText(_translate("MainWindow", "Turn on light"))
         self.stopSpotlightBtn.setText(_translate("MainWindow", "Turn off light"))
-        
+
+        # led control buttons
+        self.redLightBtn.setText(_translate("MainWindow", "Turn on red LED"))
+        self.yellowLightBtn.setText(_translate("MainWindow", "Turn on yellow LED"))
+        self.greenLightBtn.setText(_translate("MainWindow", "Turn on green LED"))
+        self.offLightBtn.setText(_translate("MainWindow", "Turn off all LEDs"))
+        self.blinkLightBtn.setText(_translate("MainWindow", "Blink last LED"))
 
 
     def mousePressEvent(self, event):
@@ -1054,8 +1072,8 @@ class CameraStreamApp(QtWidgets.QMainWindow):
             self.yolo_stream.cap.release()
         event.accept()
 
-# new class for relay control
-class RelayControl(QtWidgets.QMainWindow):
+# new class for light control
+class LightControl(QtWidgets.QMainWindow):
     def __init__(self, ui):
         super().__init__()
         self.ui = ui
@@ -1064,6 +1082,13 @@ class RelayControl(QtWidgets.QMainWindow):
         self.ui.stopSpotlightBtn.clicked.connect(self.spot_off)
         self.r = sainsmartrelay.SainsmartRelay()
 
+        self.ui.redLightBtn.clicked.connect(self.red_on)
+        self.ui.yellowLightBtn.clicked.connect(self.yellow_on)
+        self.ui.greenLightBtn.clicked.connect(self.green_on)
+        self.ui.offLightBtn.clicked.connect(self.leds_off)
+        self.ui.blinkLightBtn.clicked.connect(self.leds_blink)
+        self.w = wledControl.WLEDController(port="/dev/serial/by-path/pci-0000:00:14.0-usbv2-0:1:1.0-port0")
+
     def spot_on(self):
         print("Turn on light clicked")
         self.r.turn_on(1)
@@ -1074,27 +1099,23 @@ class RelayControl(QtWidgets.QMainWindow):
     
     def red_on(self):
         print("Red light is on")
-        self.r.turn_on(2)
-    
-    def red_off(self):
-        print("Red light is off")
-        self.r.turn_off(2)
+        self.w.switch_to_red()
 
     def yellow_on(self):
         print("Yellow light is on")
-        self.r.turn_on(3)
-
-    def yellow_off(self):
-        print("Yellow light is off")
-        self.r.turn_off(3)
+        self.w.switch_to_yellow()
 
     def green_on(self):
         print("Green light is on")
-        self.r.turn_on(4)
+        self.w.switch_to_green()
 
-    def green_off(self):
-        print("Green light is off")
-        self.r.turn_off(4)
+    def leds_off(self):
+        print("LEDs are off")
+        self.w.turn_off_all()
+
+    def leds_blink(self):
+        print("Previous color is blinking")
+        self.w.change_effect()
 
 if __name__ == "__main__":
     import sys
@@ -1105,8 +1126,8 @@ if __name__ == "__main__":
 
     # Initialize the CameraStreamApp with the UI
     camera_app = CameraStreamApp(ui)
-    # initialize relay app
-    relay_app = RelayControl(ui)
+    # initialize light control app
+    light_app = LightControl(ui)
 
     MainWindow.show()
     sys.exit(app.exec_())
\ No newline at end of file