diff --git a/Documentation/epicardium-guide.rst b/Documentation/epicardium-guide.rst
index fd6d54f11659f24c852017f02d6404f50f7a3380..7a549214442083b5a033b25ac84331fbda1a470f 100644
--- a/Documentation/epicardium-guide.rst
+++ b/Documentation/epicardium-guide.rst
@@ -1,3 +1,5 @@
+.. _epicardium_api_guide:
+
 Epicardium API Development
 ==========================
 If you are interested in augmenting the Epicardium API with new calls, this
diff --git a/Documentation/overview.rst b/Documentation/overview.rst
index e9708c9277e9a9358cd4f4c5dee86540fd532ab5..9025c1a76134e1f75d55351dc17f44de9badb868 100644
--- a/Documentation/overview.rst
+++ b/Documentation/overview.rst
@@ -19,6 +19,9 @@ number of tasks that will have been keeping card10 running.  These are:
   statistics that can be gathered from our power manager IC (MAX77650).
 * **Serial**:  Handles serial communication via *UART*, *CDC ACM* and possibly
   Bluetooth.
+* **BHI160**: Housekeeping task for interaction with the `BHI160`_.
+
+.. _BHI160: https://www.bosch-sensortec.com/bst/products/all_products/bhi160
 
 .. todo::
 
@@ -29,6 +32,13 @@ number of tasks that will have been keeping card10 running.  These are:
 
    .. _#23: https://git.card10.badge.events.ccc.de/card10/firmware/issues/23
 
+Epicardium API
+--------------
+Epicardium exposes lots of functionality via the *Epicardium API*.  The
+technical details if this API can be found in this :ref:`overview
+<epicardium_api_overview>`.  If you are interesting in adding new API calls,
+you should probably read the :ref:`epicardium_api_guide` guide.
+
 Pycardium
 ---------
 Pycardium is our MicroPython fork.  Its purpose is to make it as easy as