diff --git a/doxymain.md b/doxymain.md
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--- a/doxymain.md
+++ b/doxymain.md
@@ -1,2 +1,3 @@
 # Dezibot4 library
-* [PDF-Doku](https://hardwarelabor.imn.htwk-leipzig.de/dezibot/dezibot.pdf)
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+* [PDF-Doku Code](https://hardwarelabor.imn.htwk-leipzig.de/dezibot/dezibot.pdf)
+* [PDF-Doku Device](https://hardwarelabor.imn.htwk-leipzig.de/dezibot/dezibot-4doku.pdf)
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