diff --git a/readme.md b/readme.md
index 771af3d..f40652a 100644
--- a/readme.md
+++ b/readme.md
@@ -39,6 +39,8 @@ The communcation with the game play controller is implemented as a sequences of
 
 ![](./docs/rgb-driver.jpg)
 
+Details are here https://gitea.hottis.de/wn/tetris/src/branch/main/rgb-driver/readme.md
+
 
 ## Score Display