Updated documentation.

docs/usage_device.rst

@@ -77,6 +77,10 @@ used for missing keys. All descriptions may be empty.
    * - ``return``
      - ``return``
 
+To reduce the memory footprint, the use of the ``F()`` macro is allowed in the
+``interface()`` function. This stores the documentation string in program
+memory instead of SRAM. For more information, see the progmem_ documentation.
+
 Example
 ^^^^^^^
 
@@ -146,3 +150,6 @@ Exporting this class method as a remote call goes as follows:
           pack(&led, &LED::setBrightness),
             "set_led: Set LED brightness. @brightness: Brightness.");
       }
+
+
+.. _progmem: https://www.arduino.cc/reference/en/language/variables/utilities/progmem/

docs/usage_host.rst

@@ -83,6 +83,32 @@ Additionally, the ``with`` statement is supported for easy opening and closing.
     >>> with Interface('/dev/ttyACM0') as interface:
     >>>     interface.version()
 
+The class instance has a public member variable named ``methods`` which
+contains the definitions of the exported methods.
+
+.. code:: python
+
+    >>> interface.methods.keys()
+    dict_keys(['inc', 'set_led'])
+    >>> interface.methods['inc']
+    {
+      'return': {
+        'doc': 'a + 1.',
+        'fmt': '<h',
+        'typename': 'int'},
+      'doc': 'Increment a value.',
+      'name': 'inc',
+      'index': 2,
+      'parameters': [
+        {
+          'doc': 'Value.',
+          'name': 'a',
+          'fmt': '<h',
+          'typename': 'int'
+        }
+      ]
+    }
+
 Example
 ^^^^^^^