Update README.md

README.md

@@ -16,6 +16,12 @@ This project investigates using robot primitives to create drawings in the style
 
 
 [![](/images/fig_5.jpg)](https://youtu.be/RIbZDw12SdM "Root within perimeter")
+
+## Used these repos
+
+- https://github.com/getsenic/gatt-python
+- https://github.com/RootRobotics/root-robot-ble-protocol#ble-profile
+- https://github.com/zlite/PyRoot
          
 ## Color decode chart for sensors