Improve docs for pywemo/subscribe

pywemo/README.md

@@ -0,0 +1,69 @@
+# API Documentation
+
+For example usage and installation instructions see 
+[README.rst](https://github.com/pywemo/pywemo/blob/main/README.rst)
+
+## General structure of the pyWeMo API
+
+### Discovery
+
+The `pywemo.discovery` module contains methods to locate WeMo devices on a
+network. For example, use the following to discover all devices on the
+network:
+
+```python
+>>> import pywemo
+>>> devices = pywemo.discover_devices()
+>>> print(devices)
+[<WeMo Insight "AC Insight">]
+```
+
+Or, if you know the IP address of the device, use this example.
+
+```python
+>>> import pywemo
+>>> url = pywemo.setup_url_for_address("192.168.1.192")
+>>> print(url)
+http://192.168.1.192:49153/setup.xml
+>>> device = pywemo.device_from_description(url)
+>>> print(device)
+[<WeMo Insight "AC Insight">]
+```
+
+### Devices
+
+The device(s) returned by the discovery methods above will be instances of one
+of the classes below. These classes, used for communicating with the various,
+WeMo devices are in submodules under the `pywemo.ouimeaux_device` module. They
+can also be accessed as top-level members of the pywemo module.
+
+WeMo Model|Alias / Class
+----------|-------------
+  F7C031  |`pywemo.Bridge` / `pywemo.ouimeaux_device.bridge.Bridge`
+  F7C050  |`pywemo.CoffeeMaker` / `pywemo.ouimeaux_device.coffeemaker.CoffeeMaker`
+  F7C045  |`pywemo.CrockPot` / `pywemo.ouimeaux_device.crockpot.CrockPot`
+  F7C059  |`pywemo.DimmerLongPress` / `pywemo.ouimeaux_device.dimmer.DimmerLongPress`
+  WDS060  |`pywemo.DimmerV2` / `pywemo.ouimeaux_device.dimmer.DimmerV2`
+  F7C046  |`pywemo.Humidifier` / `pywemo.ouimeaux_device.humidifier.Humidifier`
+  F7C029  |`pywemo.Insight` / `pywemo.ouimeaux_device.insight.Insight`
+  F7C030  |`pywemo.LightSwitchLongPress` / `pywemo.ouimeaux_device.lightswitch.LightSwitchLongPress`
+  WLS040  |`pywemo.LightSwitchLongPress` / `pywemo.ouimeaux_device.lightswitch.LightSwitchLongPress`
+  WLS0403 |`pywemo.LightSwitchLongPress` / `pywemo.ouimeaux_device.lightswitch.LightSwitchLongPress`
+  F7C043  |`pywemo.Maker` / `pywemo.ouimeaux_device.maker.Maker`
+  F7C028  |`pywemo.Motion` / `pywemo.ouimeaux_device.motion.Motion`
+  WSP090  |`pywemo.OutdoorPlug` / `pywemo.ouimeaux_device.outdoor_plug.OutdoorPlug`
+  F7C027  |`pywemo.Switch` / `pywemo.ouimeaux_device.switch.Switch`
+  F7C063  |`pywemo.Switch` / `pywemo.ouimeaux_device.switch.Switch`
+  WSP080  |`pywemo.Switch` / `pywemo.ouimeaux_device.switch.Switch`
+
+The following are base classes of all of the above device classes.
+
+* pywemo.ouimeaux_device.Device: Provides common methods for getting/setting
+  device state.
+* pywemo.ouimeaux_device.api.xsd_types.DeviceDescription: Provides information
+  about the device name, mac address, firmware version, serial number, etc.
+
+### Subscriptions
+
+Most WeMo devices support a push/callback model for reporting state changes.
+The `pywemo.subscribe` module provides a way to subscribe to push events.

pywemo/__init__.py

@@ -1,4 +1,6 @@
-"""Lightweight Python module to discover and control WeMo devices."""
+r"""Lightweight Python module to discover and control WeMo devices.
+.. include:: README.md
+"""
 # flake8: noqa F401
 
 from .discovery import (

pywemo/subscribe.py

@@ -1,4 +1,36 @@
-"""Module to listen for wemo events."""
+"""Module to listen for WeMo events.
+
+Example usage:
+
+```python
+import pywemo
+# The SubscriptionRegistry maintains push subscriptions to each endpoint
+# of a device.
+registry = pywemo.SubscriptionRegistry()
+registry.start()
+
+device = ... # See example of discovering devices in the pywemo module.
+
+# Start subscribing to push notifications of state changes.
+registry.register(device)
+
+def push_notification(device, event, params):
+    '''Notify device of state change and get new device state.'''
+    processed_update = device.subscription_update(event, params)
+    state = device.get_state(force_update=not processed_update)
+    print(f"Device state: {state}")
+
+# Register a callback to receive state push notifications.
+registry.on(device, None, push_notification)
+
+# Do some work.
+# time.sleep(60)
+
+# Stop the registry
+registry.unregister(device)
+registry.stop()
+```
+"""
 from __future__ import annotations
 
 import collections