The Nous E3 door/window sensor is a small-sized, wireless smart home sensor that supports the Tuya Zigbee protocol and communicates with the network via a Tuya Zigbee gateway. It is compatible with Tuya/SmartLife Zigbee gateways, through which it communicates with the Tuya cloud, enabling control of other Wi-Fi or Zigbee Tuya compatible devices based on its alerts, and it can send alerts to your phone via the Tuya/Nous app.

What is the Tuya / SmartLife smart home platform and app? 

Tuya is a popular cloud-based smart home platform that offers integrated solutions for various smart home devices and applications. The platform allows quick and easy pairing of devices, remote control, and management through a single app interface. Tuya, also known as SmartLife, provides users with a comprehensive smart home ecosystem, including devices from numerous manufacturers.

It supports voice control, remote access, and automated processes (scenes). The Tuya platform also integrates with a range of other smart home ecosystems, such as Amazon Alexa, Google Assistant, and SmartThings, enabling Tuya devices to be used on these platforms as well. Tuya, similar to the global eWeLink platform, is also a cloud-based system, but the quality of available Tuya devices can vary significantly.

In the Tuya lineup, the European brand Nous offers stable quality Tuya devices. Their devices can be used with the Nous app or the standard Tuya app.

The device can be used with the Nous app and the Tuya app, with more functions available through the latter based on user experience. 

The sensor is a recommended sensor for the Tuya smart home system, primarily operating in cloud mode. However, for Tuya Zigbee gateways that can cache and execute automations locally, its automations can work without an internet connection. 

When connected to a Tuya Zigbee gateway, it supports voice control via Amazon Alexa, Google Assistant, and (for iOS phones) Siri.

Product Features:

• Tuya Zigbee chip connection: Connects to Tuya Zigbee gateways via the 2.4 GHz Tuya Zigbee protocol.
• Zigbee technology provides long-range data transmission, and the mesh technology can further extend it.
• Voice control: Compatible with Google Assistant and Amazon Alexa systems, allowing control via voice commands (with Tuya Zigbee gateways).