diff --git a/main/config.hpp b/main/config.hpp
index bf32c2a..a4eb5d0 100644
--- a/main/config.hpp
+++ b/main/config.hpp
@@ -1,5 +1,7 @@
 #pragma once
+extern "C" {
 #include "driver/adc.h"
+}
 #include "gpio_evaluateSwitch.hpp"
 #include "buzzer.hpp"
 
diff --git a/main/control.cpp b/main/control.cpp
index cc38a8f..54a54c1 100644
--- a/main/control.cpp
+++ b/main/control.cpp
@@ -320,51 +320,43 @@ void task_control(void *pvParameter)
 
 
 
-        //---------------------------
-        //--------- display ---------
-        //---------------------------
-        //-- show current position on display1 ---
-        sprintf(buf_tmp, "1ST %5.4f", (float)lengthNow/1000); //m
+        //--------------------------
+        //-------- display1 --------
+        //--------------------------
+        //show current position on display
+        sprintf(buf_tmp, "1ST %5.4f", (float)lengthNow/1000);
         //                123456789
         //limit length to 8 digits + decimal point (drop decimal places when it does not fit)
         sprintf(buf_disp1, "%.9s", buf_tmp);
         display1_showString(buf_disp1);
 
-        //--- show target length on display2 ---
-        //sprintf(buf_disp2, "%06.1f cm", (float)lengthTarget/10); //cm
-        sprintf(buf_tmp, "S0LL%5.3f", (float)lengthTarget/1000); //m
-        //                  1234  5678
-        display2_showString(buf_tmp);
-        
+
+        //--------------------------
+        //-------- display2 --------
+        //--------------------------
+        //setting target length: blink target length
+        if (SW_SET.state == true){
+            sprintf(buf_tmp, "S0LL%5.3f", (float)lengthTarget/1000);
+            display2_blinkStrings(buf_tmp, "        ", 400, 100);
+        }
+        //manual state: blink "manual"
+        else if (controlState == MANUAL) {
+            display2_blinkStrings(" MANUAL ", "        ", 1000, 500);
+        }
+        //otherwise show target length
+        else {
+            //sprintf(buf_disp2, "%06.1f cm", (float)lengthTarget/10); //cm
+            sprintf(buf_tmp, "S0LL%5.3f", (float)lengthTarget/1000); //m
+            //                1234  5678
+            display2_showString(buf_tmp);
+        }
+
+
         //TODO: blink disp2 when set button pressed
         //TODO: blink disp2 when preset button pressed (exept manual mode)
         //TODO: write "MAN CTL" to disp2 when in manual mode
         //TODO: display or blink "REACHED" when reached state and start pressed
 
-        //--- write to display ---
-        //max7219_clear(&display); //results in flickering display if same value anyways
-        //max7219_draw_text_7seg(&display, 0, buf_disp1);
-        //max7219_draw_text_7seg(&display, 8, buf_disp2);
-
-        //  //switch between two display pages
-        //  if (esp_log_timestamp() - timestamp_pageSwitched > 1000){
-        //      timestamp_pageSwitched = esp_log_timestamp();
-        //      page = !page;
-        //  }
-        //  max7219_clear(&display);
-        //  if (page){
-        //      //display current position
-        //      display_current_distance(&display, &encoder);
-        //  } else {
-        //      //display counter
-        //      sprintf(display_buf, "lvl: %02d", count);
-        //      max7219_draw_text_7seg(&display, 0, display_buf);
-        //      //count++;
-        //  }
-
-        //sprintf(display_buf, "S0LL 12.3");
-        //max7219_draw_text_7seg(&display, 8, display_buf);
-
     }
 
 }
diff --git a/main/display.cpp b/main/display.cpp
index 7a583c2..152e410 100644
--- a/main/display.cpp
+++ b/main/display.cpp
@@ -5,6 +5,17 @@
 static const char *TAG = "display"; //tag for logging
 max7219_t display;
 
+bool disp1_blinkMode = false;
+
+char disp2_strOn[20];
+char disp2_strOff[20];
+bool disp2_state = false;
+bool disp2_blinkMode = false;
+uint32_t disp2_timestampOn;
+uint32_t disp2_timestampOff;
+uint32_t disp2_msOn;
+uint32_t disp2_msOff;
+
 //========================
 //===== init display =====
 //========================
@@ -62,16 +73,70 @@ void display_ShowWelcomeMsg(){
 
 
 void display1_showString(const char * buf){
-        max7219_draw_text_7seg(&display, 0, buf);
+    max7219_draw_text_7seg(&display, 0, buf);
+    disp1_blinkMode = false;
 }
 void display2_showString(const char * buf){
-        max7219_draw_text_7seg(&display, 8, buf);
+    max7219_draw_text_7seg(&display, 8, buf);
+    disp2_blinkMode = false;
 }
 
 void display_showString(uint8_t pos, const char * buf){
-        max7219_draw_text_7seg(&display, pos, buf);
+    max7219_draw_text_7seg(&display, pos, buf);
 }
 
+
+
+
+//function that handles blinking of display2
+void display2_handle(){
+    if (disp2_blinkMode == false){
+        return;
+    }
+    //--- define state on/off ---
+    if (disp2_state == true){ //display in ON state
+        if (esp_log_timestamp() - disp2_timestampOn > disp2_msOn){
+            disp2_state = false;
+            disp2_timestampOff = esp_log_timestamp();
+        }
+    } else { //display in OFF state
+        if (esp_log_timestamp() - disp2_timestampOff > disp2_msOff) {
+            disp2_state = true;
+            disp2_timestampOn = esp_log_timestamp();
+        }
+    }
+
+    //--- draw text of current state ---
+    if (disp2_state) {
+        max7219_draw_text_7seg(&display, 8, disp2_strOn);
+    } else {
+        max7219_draw_text_7seg(&display, 8, disp2_strOff);
+    }
+}
+
+
+
+//function switches between two strings in a given interval
+void display2_blinkStrings(const char * strOn, const char * strOff, uint32_t msOn, uint32_t msOff){
+    //copy variables
+    strcpy(disp2_strOn, strOn);
+    strcpy(disp2_strOff, strOff);
+    disp2_msOn = msOn;
+    disp2_msOff = msOff;
+    //set to blink mode
+    disp2_blinkMode = true;
+    //run handle function for display update
+    display2_handle();
+}
+
+
+
+    
+
+
+
+
+
 //        //---------------------------
 //        //--------- display ---------
 //        //---------------------------
diff --git a/main/display.hpp b/main/display.hpp
index 1c9e250..722ca9a 100644
--- a/main/display.hpp
+++ b/main/display.hpp
@@ -23,3 +23,8 @@ void display_ShowWelcomeMsg();
 void display1_showString(const char * buf);
 void display2_showString(const char * buf);
 void display_showString(uint8_t pos, const char * buf);
+
+//function that handles blinking of display2
+void display2_handle();
+//function switches between two strings in a given interval
+void display2_blinkStrings(const char * strOn, const char * strOff, uint32_t msOn, uint32_t msOff);