diff --git a/avr/main.asm b/avr/main.asm
index d01bcb2..632b591 100644
--- a/avr/main.asm
+++ b/avr/main.asm
@@ -233,7 +233,7 @@ initialWait:
 initialWait_l1:    ; wait R16 x 10 milliseconds
     ldi r17, 200
 initialWait_l2: ; wait for 10ms
-     Utils_WaitNanoSecs 50000, 0, r22 ; wait for 50 microseconds
+     rcall Utils_WaitFor50MicroSecs ; (R22)
      dec r17
     brne  initialWait_l2
     dec r16
@@ -241,47 +241,3 @@ initialWait_l2: ; wait for 10ms
   ret
 
 
-
-
-#ifdef MODULES_DS18B20
-printDs:
-  in r15, SREG ; debug
-  push r15
-    cli
-    ldi r18, 0
-    ldi r19, 2
-    rcall LCD_SetCursor
-    
-    ldi zl, LOW(textDs18b20)
-    ldi zh, HIGH(textDs18b20)
-    rcall LCD_PrintFromFlash
-    
-    ldi xl, LOW(ds18b20DataBuffer)
-    ldi xh, HIGH(ds18b20DataBuffer)
-    ldi r23, 9
-printDs_loop1:
-      ld r16, X+
-      rcall LCD_PrintHexByte
-      
-      ldi r16, 32
-      rcall LCD_PrintChar
-      dec r23
-    brne printDs_loop1
-  pop r15
-  out SREG, r15
-  ret
-#endif
-
-#endif
-
-
-
-#ifdef MODULES_SI7021
-# ifdef MODULES_LCD
-  textDs18b20:             .db "Rec: ", 0
-# endif
-#endif
-
-
-
-
diff --git a/avr/modules/ds18b20/screen.asm b/avr/modules/ds18b20/screen.asm
new file mode 100644
index 0000000..90c08fa
--- /dev/null
+++ b/avr/modules/ds18b20/screen.asm
@@ -0,0 +1,67 @@
+; ***************************************************************************
+; copyright   : (C) 2024 by Martin Preuss
+; email       : martin@libchipcard.de
+;
+; ***************************************************************************
+; * This file is part of the project "AqHome".                              *
+; * Please see toplevel file COPYING of that project for license details.   *
+; ***************************************************************************
+
+
+; +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+; This file contains timer handlers for the address protocol
+; +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+;
+
+
+; ***************************************************************************
+; code
+
+.cseg
+
+
+DS18B20_Screen:
+  in r15, SREG
+  push r15
+    cli
+
+    ldi r16, 0
+    rcall LCD_Fill
+
+    ldi r18, 0
+    ldi r19, 0
+    rcall LCD_SetCursor
+    ldi zl, LOW(ds18b20ScreenText_title)
+    ldi zh, HIGH(ds18b20ScreenText_title)
+    rcall LCD_PrintFromFlash
+
+    ldi r18, 0
+    ldi r19, 2
+    rcall LCD_SetCursor
+    
+    ldi zl, LOW(ds18b20ScreenText_buffer)
+    ldi zh, HIGH(ds18b20ScreenText_buffer)
+    rcall LCD_PrintFromFlash
+    
+    ldi xl, LOW(ds18b20DataBuffer)
+    ldi xh, HIGH(ds18b20DataBuffer)
+    ldi r23, 9
+DS18B20_Screen_loop1:
+      ld r16, X+
+      rcall LCD_PrintHexByte
+      
+      ldi r16, 32
+      rcall LCD_PrintChar
+      dec r23
+    brne DS18B20_Screen_loop1
+  pop r15
+  out SREG, r15
+  ret
+
+
+
+ds18b20ScreenText_title:  .db "DS18B20", 0
+ds18b20ScreenText_buffer: .db "Rec: ", 0
+
+
+