Update README.md

README.md

@@ -13,6 +13,7 @@ Develop a system that analyzes sensor data to detect room occupancy and optimize
 - Sensor data (motion, CO₂, temperature, humidity).  
 - Room metadata (capacity, function, floor plan).  
 - Historical occupancy logs (2+ months).  
+- Exisiting Codebase: https://gitlab.rz.hft-stuttgart.de/11akmi1bif/raumbelegung-messung-bplaced
 - Energy usage/cost data for validation (if available).  
 
 ## Acceptance Criteria