The Xiaomi Home Assistant is a smart home system that integrates various devices to provide a seamless user experience. However, some users have reported issues with the OAuth2 Redirect URL, which cannot be customized to use an IP address. This article aims to provide a detailed analysis of the problem, the expected behavior, and potential solutions. The OAuth2 Redirect URL is a crucial component of the Xiaomi Home Assistant, as it enables secure authentication and authorization of devices. The current implementation does not allow users to specify a fixed IP address as the Redirect URL, which can lead to integration issues with other smart devices. To reproduce the issue, users can follow the steps outlined in the troubleshooting guide, which includes configuring the OAuth2 settings and testing the Redirect URL. The expected behavior is that the OAuth2 Redirect URL should be customizable to use a fixed IP address, allowing for seamless integration with other devices. The Home Assistant logs and system logs can provide valuable insights into the issue, and users are encouraged to share their logs to help resolve the problem. The latest versions of Home Assistant Core, Home Assistant Operation System, and Xiaomi Home integration are recommended to ensure optimal performance and compatibility. Additional context, such as images and screenshots, can also be helpful in diagnosing the issue. By understanding the root cause of the problem and providing a clear explanation of the expected behavior, users can work together to find a solution and improve the overall functionality of the Xiaomi Home Assistant.