ECR Connection
1. Activate the ECR terminal device
1.1 Open and login to the Wonder App, and switch to the relevant business
1.2 Start the ECR terminal device. The following QR code bound to business will be displayed

1.3 Use the barcode scanner of the Wonder App to bind the ECR terminal device with the business
1.4 After successful binding, the device application will automatically redirect to the device pairing page

2. ECR terminal device pairing
2.1 Via Cloud
Obtain a six-digit terminal device pairing code
Enter the pairing code into the customer's pairing page, similar to the following:
Generate an AES256 Key using the pairing code
Use the ECR terminal Device synchronization interface to obtain the Device SN of the ECR terminal device
After obtaining the Device SN of the ECR terminal device, pair it using the pairing interface and the confirmation pairing interface

2.2 Via RS232
Obtain a six-digit terminal device pairing code
Enter the pairing code into the customer's pairing page, similar to the following:
Generate an AES256 Key using the pairing code
After obtaining the Device SN of the ECR terminal device, pair it using the pairing interface and the confirmation pairing interface

2.3 Via Local Area Network
Obtain a six-digit terminal device pairing code
Enter the pairing code into the customer's pairing page, similar to the following:
Generate an AES256 Key using the pairing code
Enter the IP address and port
After obtaining the Device SN of the ECR terminal device, pair it using the pairing interface and the confirmation pairing interface
