Domoticz-Tuya-Thermostat-Plugin

A Domoticz plugin to manage Tuya based thermostat devices

Tested with 16A-002HB-WiFi, 16A-002BB-WiFi.

Got it from AliExpress Smart Home World Store.

App is called Smart Life - Smart Living.

Follow instructions below to extract encryption key required for plugin configuration.

This device also works fine without internet connection after initial setup is done, only the clock will not be usable.

Time is synced from http Tuya cloud service.

Prerequisites

This plugin is based on the pytuya Python library. For the installation of this library, follow the Installation guide below. See https://github.com/clach04/python-tuya/ for more information.

For the pytuya Python library, you need pycrypto. pycrypto can be installed with pip:

pip3 install pycrypto

See https://pypi.org/project/pycrypto/ for more information.

Installation

Assuming that domoticz directory is installed in your home directory.

cd ~/domoticz/plugins
git clone https://github.com/iasmanis/Domoticz-Tuya-Thermostat-Plugin
cd Domoticz-Tuya-Thermostat-Plugin
git clone https://github.com/clach04/python-tuya.git
ln -s ~/domoticz/plugins/Domoticz-Tuya-Thermostat-Plugin/python-tuya/pytuya pytuya
# restart domoticz:
sudo /etc/init.d/domoticz.sh restart

In the web UI, navigate to the Hardware page. In the hardware dropdown there will be an entry called "Tuya SmartThermostat".

Known issues

1/ python environment

Domoticz may not have the path to the pycrypto library in its python environment. In this case you will observe something starting like that in the log:

• failed to load 'plugin.py', Python Path used was
• Module Import failed, exception: 'ImportError'

To find where pycrypto is installed, in a shell:

pip3 show pycrypto

The Crypto directory should be present in the directory indicated with Location.

when you have it, just add a symbolic link to it in Domoticz-Tuya-Thermostat-Plugin directory with ln -s. Example:

cd ~/domoticz/plugins/Domoticz-Tuya-Thermostat-Plugin
ln -s /home/pi/.local/lib/python3.5/site-packages/Crypto Crypto

2/ Tuya app

The tuya app must be close. This limitation is due to the tuya device itself that support only one connection.

3/ Alternative crypto libraries

PyCryptodome or pyaes can be used instead of pycrypto.

Updating

Like other plugins, in the Domoticz-Tuya-Thermostat-Plugin directory:

git pull
sudo /etc/init.d/domoticz.sh restart

Parameters

Parameter	Value
IP address	IP of the Smart Thermostat eg. 192.168.1.231
DevID	devID of the Smart Thermostat
Local Key	Local Key of the Smart Thermostat
Debug	default is 0

Helper scripts get_dps.py turnON.py and turnOFF.py can help:

• to determine the dps list
• to check that the needed information are valid (i.e. devID and Local Key) before using the plugin.

DevID & Local Key Extraction

Recommended method: https://github.com/codetheweb/tuyapi/blob/master/docs/SETUP.md

All the information can be found here: https://github.com/clach04/python-tuya/

Acknowledgements

• Special thanks for all the hard work of clach04, codetheweb and all the other contributers on python-tuya and tuyapi who have made communicating to Tuya devices possible with open source code.
• Domoticz team

References

• Details helping to decode thermostat values https://www.domoticz.com/forum/viewtopic.php?t=25965