diff --git a/lib/obp60task/OBP60Hardware.h b/lib/obp60task/OBP60Hardware.h
index c0319ca..293c4ae 100644
--- a/lib/obp60task/OBP60Hardware.h
+++ b/lib/obp60task/OBP60Hardware.h
@@ -54,7 +54,7 @@
     #define TONE4 4000          // 4000Hz
     // Analog Input
     #define OBP_ANALOG0 4       // Voltage power supplay
-    #define MIN_VOLTAGE 9.0     // Min voltage for under voltage detection (then goto deep sleep)
+    #define MIN_VOLTAGE 10.0    // Min voltage for under voltage detection (then goto deep sleep)
     #define POWER_FAIL_TIME 2   // in [ms] Accept min voltage until 2 x 1ms (for under voltage gaps by engine start)
     // Touch buttons
     #define TOUCHTHRESHOLD 50000// Touch sensitivity, lower values more sensitiv
diff --git a/lib/obp60task/OBPSensorTask.cpp b/lib/obp60task/OBPSensorTask.cpp
index 70d19d9..d807136 100644
--- a/lib/obp60task/OBPSensorTask.cpp
+++ b/lib/obp60task/OBPSensorTask.cpp
@@ -19,47 +19,7 @@
 #include "movingAvg.h"                  // Lib for moving average building
 
 // Timer Interrupts for hardware functions
-void underVoltageDetection();
-Ticker Timer1(underVoltageDetection, 1);    // Start Timer1 with maximum speed with 1ms
-Ticker Timer2(blinkingFlashLED, 500);       // Satrt Timer2 for flash LED all 500ms
-
-// Undervoltage function for shutdown display
-void underVoltageDetection(){
-    float actVoltage = (float(analogRead(OBP_ANALOG0)) * 3.3 / 4096 + 0.17) * 20;   // V = 1/20 * Vin
-    long starttime = 0;
-    static bool undervoltage = false;
-
-    if(actVoltage < MIN_VOLTAGE){
-        if(undervoltage == false){
-            starttime = millis();
-            undervoltage = true;
-        }
-        if(millis() > starttime + POWER_FAIL_TIME){
-            Timer1.stop();                          // Stop Timer1
-/*
-            setPortPin(OBP_BACKLIGHT_LED, false);   // Backlight Off
-            setFlashLED(false);       // Flash LED Off
-*/            
-            buzzer(TONE4, 20);                      // Buzzer tone 4kHz 20ms
-            setPortPin(OBP_POWER_50, false);        // Power rail 5.0V Off
-            // Shutdown EInk display
-            /*
-            display.setPartialWindow(0, 0, display.width(), display.height()); // Set partial update
-            display.fillScreen(GxEPD_WHITE);        // Draw white sreen
-            display.nextPage();                     // Partial update
-            display.powerOff();                     // Power off
-            */
-
-            // Stop system
-            while(true){
-                esp_deep_sleep_start();             // Deep Sleep without weakup. Weakup only after power cycle (restart).
-            }
-        }
-    }
-    else{
-        undervoltage = false;
-    }
-}
+Ticker Timer1(blinkingFlashLED, 500);       // Satrt Timer2 for flash LED all 500ms
 
 // Initialization for all sensors (RS232, I2C, 1Wire, IOs)
 //####################################################################################
@@ -112,7 +72,7 @@ void sensorTask(void *param){
     if(uvoltage == true){
         Timer1.start();     // Start Timer1 for undervoltage detection
     }
-    Timer2.start();         // Start Timer2 for blinking LED
+    Timer1.start();         // Start Timer2 for blinking LED
    
     // Direction settings for NMEA0183
     String nmea0183Mode = api->getConfig()->getConfigItem(api->getConfig()->serialDirection, true)->asString();
@@ -387,8 +347,7 @@ void sensorTask(void *param){
 
     while (true){
         delay(100);                 // Loop time 100ms
-        Timer1.update();            // Update for Timer1
-        Timer2.update();            // Update for Timer2
+        Timer1.update();            // Update for Timer2
         if (millis() > starttime0 + 100)
         {
             starttime0 = millis();
diff --git a/lib/obp60task/obp60task.cpp b/lib/obp60task/obp60task.cpp
index 0cee921..a4423ed 100644
--- a/lib/obp60task/obp60task.cpp
+++ b/lib/obp60task/obp60task.cpp
@@ -221,6 +221,48 @@ void registerAllPages(PageList &list){
     list.add(&registerPageGenerator);
 }
 
+// Undervoltage detection for shutdown display
+void underVoltageDetection(GwApi *api){
+    int textcolor = GxEPD_BLACK;
+    int pixelcolor = GxEPD_BLACK;
+    int bgcolor = GxEPD_WHITE;
+    // Read settings
+    String displaycolor = api->getConfig()->getConfigItem(api->getConfig()->displaycolor,true)->asString();
+    float vslope = uint(api->getConfig()->getConfigItem(api->getConfig()->vSlope,true)->asFloat());
+    float voffset = uint(api->getConfig()->getConfigItem(api->getConfig()->vOffset,true)->asFloat());
+    // Read supplay voltage
+    float actVoltage = (float(analogRead(OBP_ANALOG0)) * 3.3 / 4096 + 0.17) * 20;   // V = 1/20 * Vin
+    actVoltage = actVoltage * vslope + voffset;
+    if(actVoltage < MIN_VOLTAGE){
+        // Switch off all power lines
+        setPortPin(OBP_BACKLIGHT_LED, false);   // Backlight Off
+        setFlashLED(false);                     // Flash LED Off            
+        buzzer(TONE4, 20);                      // Buzzer tone 4kHz 20ms
+        setPortPin(OBP_POWER_50, false);        // Power rail 5.0V Off
+        // Shutdown EInk display
+        if(displaycolor == "Normal"){
+            textcolor = GxEPD_BLACK;
+            bgcolor = GxEPD_WHITE;
+        }
+        else{
+            textcolor = GxEPD_WHITE;
+            bgcolor = GxEPD_BLACK;
+        }
+        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        getdisplay().fillScreen(bgcolor);       // Clear screen
+        getdisplay().setTextColor(textcolor);
+        getdisplay().setFont(&Ubuntu_Bold20pt7b);
+        getdisplay().setCursor(65, 150);
+        getdisplay().print("Undervoltage");
+        getdisplay().nextPage();                // Partial update
+        getdisplay().powerOff();                // Display power off
+        // Stop system
+        while(true){
+            esp_deep_sleep_start();             // Deep Sleep without weakup. Weakup only after power cycle (restart).
+        }
+    }
+}
+
 // OBP60 Task
 //####################################################################################
 void OBP60Task(GwApi *api){
@@ -355,6 +397,7 @@ void OBP60Task(GwApi *api){
     String backlightColor = api->getConfig()->getConfigItem(api->getConfig()->blColor,true)->asString();
     CHSV color = colorMapping(backlightColor);
     uint brightness = 2.55 * uint(api->getConfig()->getConfigItem(api->getConfig()->blBrightness,true)->asInt());
+    bool uvoltage = api->getConfig()->getConfigItem(api->getConfig()->underVoltage,true)->asBoolean();
 
     // refreshmode defined in init section
     // displaycolor defined in init section
@@ -391,6 +434,12 @@ void OBP60Task(GwApi *api){
     while (true){
         delay(100);     // Delay 100ms (loop time)
 
+    
+        // Undervoltage detection
+        if(uvoltage == true){
+            underVoltageDetection(api);
+        }
+
         if(millis() > starttime0 + 100){
             starttime0 = millis();
             commonData.data=shared->getSensorData();