Activation and Binding with QR Code

Activate and bind a device by scanning its QR code using the mobile app.

Terms

• QR code

  A QR code is a kind of two-dimensional barcode that holds encoded data in a graphical black-and-white pattern.

• Short URL

  Convert a long URL into a shorter one using a program. Short URLs hide the real address and are easier to read, share, and remember.

Feature description

The process of activation and binding with QR code.

1. The device connects to the cloud over MQTT.
2. The mobile app reads the device’s QR code and then sends the decoded data to the cloud.
3. The mobile app requests the token for pairing.
4. The cloud sends the token to the device.
5. The device disconnects from the MQTT server.
6. The device uses the token to request information such as the domain name and time zone to perform activation and binding.

Activation and binding with QR code applies to the following devices:

• Devices that use cellular networks, including GPRS, 3G, and 4G.
• Wireless devices with screens that allow the user to enter Wi-Fi passwords, such as digital photo frames.
• Wired devices.

How it works

Development guide

Runtime environment

Open tuya_iot_config.h and check if the following macro is defined.

#define ENABLE_QRCODE_ACTIVE 1

How to

• Create a product on the Tuya Developer Platform and then enter the product development process. Click on the Function Definition tab, scroll down to Advanced Functions, and enable LinkSDK. Purchase licenses for device authorization using the PID of this product.

  

  You might not find LinkSDK in Advanced Functions. This is because the product solution does not have this function bound. To request binding it with your product, contact your account manager or submit a service ticket.

  You can use the purchased license to implement the function of activation and binding with QR code only after enabling LinkSDK.

• After the call of device initialization, set the network information (for Wi-Fi devices, set the Wi-Fi’s SSID and password with an API request). After the device is connected to the internet, it will initiate an MQTT connection and proceed with activation.

• If you need the short URL to generate a QR code for display, register the callback active_shorturl provided in smart device functionality callbacks during device initialization. This callback returns the short URL after the device is connected to the internet.