Add support for zhimi.humidifier.ca4 (miot) (rytilahti#772)

* Added minimal functionality for work air humidifier via miot for zhimi.humidifier.ca4

* Implemented all features of air humidifier miot

* Added tests for air humidifier miot

* Airhumidifier_miot added divided by 1.25 for water level for providing percentage of the level

* airhumidifier miot added and updated tests

* Added miio.airhumidifier_miot to docs

* AirHumidifier_Miot. Changed to consistent naming of methods for homeAssistant and other modules

* miio/airhumidifier_miot.py Remove the duplicate docstring.

Co-authored-by: Teemu R. <tpr@iki.fi>

* Update miio/airhumidifier_miot.py

Co-authored-by: Teemu R. <tpr@iki.fi>

* Added Xiaomi Mi Air Humidifier CA4 to Readme

* AirHumidifierMiot. State fault -> error. Consistent in desc of properties. Added Logger for catch branch. Updated tests

Co-authored-by: Teemu R. <tpr@iki.fi>

README.rst

@@ -31,7 +31,7 @@ For example, executing it without any extra arguments will print out options and
 You can get some information from any miIO/miOT device, including its device model, using the `info` command::
 
     miiocli device --ip <ip> --token <token> info
-    
+
     Model: some.device.model1
     Hardware version: esp8285
     Firmware version: 1.0.1_0012
@@ -42,7 +42,7 @@ Each different device type is supported by their corresponding module (e.g., `va
 You can get the list of available commands for any given module by passing `--help` argument to it::
 
     $ miiocli vacuum --help
-    
+
     Usage: miiocli vacuum [OPTIONS] COMMAND [ARGS]...
 
     Options:
@@ -60,11 +60,12 @@ API usage
 All functionality is accessible through the `miio` module::
 
     from miio import Vacuum
-    
+
     vac = Vacuum("<ip address>", "<token>")
     vac.start()
-    
-Each separate device type inherits from `miio.Device` (and in case of miOT devices, `miio.MiotDevice`) which provides common API.
+
+Each separate device type inherits from `miio.Device`
+(and in case of miOT devices, `miio.MiotDevice`) which provides common API.
 
 Please refer to `API documentation <https://python-miio.readthedocs.io/en/latest/miio.html>`__ for more information.
 
@@ -105,7 +106,7 @@ Supported devices
 -  Xiaomi Philips Zhirui Bedroom Smart Lamp
 -  Xiaomi Universal IR Remote Controller (Chuangmi IR)
 -  Xiaomi Mi Smart Pedestal Fan V2, V3, SA1, ZA1, ZA3, ZA4, P5
--  Xiaomi Mi Air Humidifier V1, CA1, CB1, MJJSQ, JSQ001
+-  Xiaomi Mi Air Humidifier V1, CA1, CA4, CB1, MJJSQ, JSQ001
 -  Xiaomi Mi Water Purifier (Basic support: Turn on & off)
 -  Xiaomi PM2.5 Air Quality Monitor V1, B1, S1
 -  Xiaomi Smart WiFi Speaker

docs/api/miio.airhumidifier_miot.rst

@@ -0,0 +1,7 @@
+miio.airhumidifier\_miot module
+===============================
+
+.. automodule:: miio.airhumidifier_miot
+   :members:
+   :undoc-members:
+   :show-inheritance:

miio/__init__.py

@@ -9,6 +9,7 @@
 from miio.airfresh_t2017 import AirFreshT2017
 from miio.airhumidifier import AirHumidifier, AirHumidifierCA1, AirHumidifierCB1
 from miio.airhumidifier_jsq import AirHumidifierJsq
+from miio.airhumidifier_miot import AirHumidifierMiot
 from miio.airhumidifier_mjjsq import AirHumidifierMjjsq
 from miio.airpurifier import AirPurifier
 from miio.airpurifier_miot import AirPurifierMiot