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d848117384
* Add a note about socket sharing * Show inherited members for apidocs * Remove outdated note of emeters not being supported on smartstrips * Describe emeter and usage modules, add note about NTP for time sync * Describe lib design and modules * Bump sphinx version, ignore d001 (line-length) for doc8 * demote energy & usage to 3rd level, promote api for 2nd
100 lines
3.6 KiB
ReStructuredText
100 lines
3.6 KiB
ReStructuredText
.. py:module:: kasa
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Common API
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==========
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The basic functionalities of all supported devices are accessible using the common :class:`SmartDevice` base class.
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The property accesses use the data obtained before by awaiting :func:`SmartDevice.update()`.
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The values are cached until the next update call. In practice this means that property accesses do no I/O and are dependent, while I/O producing methods need to be awaited.
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See :ref:`library_design` for more detailed information.
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.. note::
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The device instances share the communication socket in background to optimize I/O accesses.
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This means that you need to use the same event loop for subsequent requests.
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The library gives a warning ("Detected protocol reuse between different event loop") to hint if you are accessing the device incorrectly.
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Methods changing the state of the device do not invalidate the cache (i.e., there is no implicit :func:`SmartDevice.update()` call made by the library).
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You can assume that the operation has succeeded if no exception is raised.
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These methods will return the device response, which can be useful for some use cases.
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Errors are raised as :class:`SmartDeviceException` instances for the library user to handle.
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Simple example script showing some functionality:
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.. code-block:: python
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import asyncio
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from kasa import SmartPlug
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async def main():
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p = SmartPlug("127.0.0.1")
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await p.update() # Request the update
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print(p.alias) # Print out the alias
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print(p.emeter_realtime) # Print out current emeter status
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await p.turn_off() # Turn the device off
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if __name__ == "__main__":
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asyncio.run(main())
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If you want to perform updates in a loop, you need to make sure that the device accesses are done in the same event loop:
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.. code-block:: python
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import asyncio
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from kasa import SmartPlug
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async def main():
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dev = SmartPlug("127.0.0.1") # We create the instance inside the main loop
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while True:
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await dev.update() # Request an update
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print(dev.emeter_realtime)
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await asyncio.sleep(0.5) # Sleep some time between updates
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if __name__ == "__main__":
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asyncio.run(main())
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Refer to device type specific classes for more examples:
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:class:`SmartPlug`, :class:`SmartBulb`, :class:`SmartStrip`,
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:class:`SmartDimmer`, :class:`SmartLightStrip`.
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Energy Consumption and Usage Statistics
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***************************************
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.. note::
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In order to use the helper methods to calculate the statistics correctly, your devices need to have correct time set.
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The devices use NTP and public servers from `NTP Pool Project <https://www.ntppool.org/>`_ to synchronize their time.
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Energy Consumption
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~~~~~~~~~~~~~~~~~~
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The availability of energy consumption sensors depend on the device.
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While most of the bulbs support it, only specific switches (e.g., HS110) or strips (e.g., HS300) support it.
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You can use :attr:`~SmartDevice.has_emeter` to check for the availability.
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Usage statistics
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~~~~~~~~~~~~~~~~
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You can use :attr:`~SmartDevice.on_since` to query for the time the device has been turned on.
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Some devices also support reporting the usage statistics on daily or monthly basis.
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You can access this information using through the usage module (:class:`kasa.modules.Usage`):
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.. code-block:: python
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dev = SmartPlug("127.0.0.1")
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usage = dev.modules["usage"]
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print(f"Minutes on this month: {usage.usage_this_month}")
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print(f"Minutes on today: {usage.usage_today}")
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API documentation
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*****************
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.. autoclass:: SmartDevice
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:members:
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:undoc-members:
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