diff --git a/README.md b/README.md
index f0c42662231f8a1bf624da139dc3d2d04d97b5fc..aed1d29426f719e733dc0c6ff53bb3e7d9c47f74 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,10 @@ This library includes all the electronics components listed in the official [Fab
 4. Go to "Preferences / Manage Symbol Libraries" and add `fab.kicad_sym` as symbol library.
 5. Go to "Preferences / Manage Footprint Libraries" and add `fab.pretty` as footprint library.
 
+## Note on modules
+
+Symbols and footprints of breakout boards (such as [DFRobot DFR0299](https://www.digikey.com/en/products/detail/dfrobot/DFR0299/6588463) or [Adafruit 3006](https://www.digikey.com/en/products/detail/adafruit-industries-llc/3006/6058477)) are not added to this library. Use plain pin-headers or pin-sockets for them in your design. Most of them have headers with 2.54mm (0.1inch) pitch and available drawings with dimensions available. As this library is made for teaching purposes, take this as an exercise.
+
 ## ToDo
 
 - [x] Create a test script that checks if parts from fab inventory are included