add docs link to readme

FoamyGuy · FoamyGuy · commit 390426ba870e · 2021-10-25T11:21:02.000-05:00
diff --git a/README.rst b/README.rst
@@ -63,6 +63,11 @@ Usage Example
 
 For example usage, see examples/pm25_simpletest.py
 
+Documentation
+=============
+
+API documentation for this library can be found on `Read the Docs <https://circuitpython.readthedocs.io/projects/pm25/en/latest/>`_.
+
 Contributing
 ============
 
