aiotuya

aiotuya ia a Python library for LAN control of Tuya devices. It can detect, provision and control devices that connect to the Tuya Cloud.

To make things easy to the user, aiotuya comes with an application key and secret that were provided by Tuya Cloud. We request that you do not use these key and secret for any other purpose.

Acknowledgement

All credits for figuring out how those device communicate goes to codetheweb and all the participants to this conversation. All I did is port their work to Python with asyncio and added bugs.

Installation

Coming soon... we will upload to Pypi

In the meantime....

python3 -m pip install aiotuya.

Usage

The easiest way to start is running the module

python3 -m aiotuya

Which, the first time around, will give you absolutely nothing. You want to start with

python3 -m aiotuya -e me@myself.com -p mypass -s WIFISSID -P WIFISECRET

After you hit the "Enter" you should get

Hit "Enter" to start
Use Ctrl-C to quit

Select Device:

            [0]     Provision new devices

Ready you devices for configuration and hit 0 followed by enter.

Then wait, hiting the "Enter" key from time to time.

You can also use the '-d' option to get debug messages. These are not suitable for human consumption and are known to cause cancer in rats.

Provisioning Caveat

For provisioning to work, you must be able to send broadcast packets over WiFi. In my case, I was only able to use provisioning on a laptop connected to my house WiFi. Trying from a wired computer did not work. Apparently my router (Asus RT-AC5300) did not relay the packets. Your milage may vary.

Provisioning is also working on a RPi3 connected through WiFi (Note that I use a USB WiFi dongle to connect, not the RPi3 WiFi module)

Provisioning is NOT YET working from a RPi2 (wire connected) with a WiFi dongle.

Remembering devices keys

During the provisioning process, the device will register with the Tuya Cloud. Once the registration has succeeded, the provisioning system will receive a key to be used when communicating with the device. By default, aiotuya will save the pairs (device id, key) in a CSV file in your home directory. The default file name is .aiotuya

The devices

At this time (Feb '19) aiotuya will handle 3 types of devices

Switch

A simple On/Off switch is provided by TuyaSwitch . It has 2 methods:

• on()
• off()

And the status will be reported as

{'state': 'on'}
{'state': 'off'}

Open/Close/Idle Switch

This is the kind of switch that can be used for curtains, garage doors and so on. It is provided with TuyaOCSwitch. It has 3 methods:

• open()
• close()
• idle()

And the state value can be one of:

• closing
• opening
• idling

LED lights

This is a colour LED light. It is provided by TuyaLight and offers the following methods:

• on()
• off()
• set_white( brightness, K)
• set_colour([hue, saturation, value])
• set_colour_rgb([pred, green, blue])
• transition_white([bright, K], duration)
• transition_colour([h, s, v], duration)
• fadein_white(bright, K, duration)
• fadeout_white(duration)
• fadein_colour([h, s, v], duration)
• fadeout_colour(duration)

Other Devices

Other devices can be added, but I do not have the information needed to add them.

Devices caveat

aiotuya keeps a connection to the device, and send a heartbeat status request every timout secs (10 secs by default). This allows it to receive real time status messages upon changes in the device status (e.g. button pressed on a switch). The downside is that Tuya devices seem to only accept one such a connection, so aiotuya has exclusive control of the device via LAN. Fortunately, the devices stop broacasting their presence when they have a network connection, so other application should not be able to find them. I have not tried to see if the cloud API was still working in that case.

How to use aiotuya

Create a class to manage your devices. The class should have at least 4 methods:

• register(self, device) This will be used to report when a new device has been found.
• unregister(self,device) This is called when connection to a device is lost.
• got_data(self, data) This is called when a device receive data. The data should be a dictionary. The 'devId' can be used to iscriminate which device received the data
• got_error(self, device, data) This is called when an error is received. The device is passed as parameter.

Subclass TuyaManager, if you want to persists the device keys, by overloading 2 methods:

• load_keys(self) Loading the known keys in the dictionary self.known_devices. called in init
• persist_keys(self) Save the keys, called when new keys are reported.

After that

MyDevs= Devices()
loop = aio.get_event_loop()
manager = DevManager(dev_parent=MyDevs)
scanner = tuya.TuyaScanner(parent=manager)
scanner.start(loop)

How does it work

Tuya devices, when they are not connected, broadcast their presence on the network, TuyaScanner listen for those broadcasts and pass them on to TuyaManager.

If the key is known, TuyaManager will create a TuyaDevice generic instance with raw_dps set, using itself as device manager. Upon receiving the device status data, Tuyamanager will try to figure out the type of device and create the proper instance using the application device manager to control the device.

TuyaManager figures out the type of device it is dealing with by issuing a status request and inspecting the returned value. If an error is returned, ot will try sending a command. The reason for this is that my OC Switch, after powering up, will return a "json struct data unvalid" error to any status request until either, a button is pressed or a valid command is issued. The behaviour of Tuyamanager is meant to circumvent this problem.

Status

0.1.0b1: Initial version. Works for me with a LED lightbulb and a Open/Close switch