The Xiaomi Home Assistant is a versatile platform that integrates various smart devices, including the Xiaomi Water Purifier S1 800G. However, some users have reported issues with the device's outwater TDS and inwater TDS not updating in real-time. This article aims to provide a comprehensive overview of the problem, its causes, and potential solutions. The issue is characterized by the TDS values not updating automatically, with updates occurring randomly or after restarting the Home Assistant or reloading the Xiaomi Home app. The expected behavior is for the TDS values to update in real-time, reflecting the current water quality. To troubleshoot this issue, users can try restarting the Home Assistant or reloading the Xiaomi Home app, which may trigger an update. Additionally, checking the system logs and ensuring that the Home Assistant Core and Operation System versions are up-to-date may help resolve the issue. The Xiaomi Home Integration Version should also be checked to ensure compatibility. If the problem persists, users can try resetting the water purifier or seeking assistance from the manufacturer's support team. In conclusion, the Xiaomi Home Assistant is a powerful tool for managing smart devices, but issues like the TDS update problem can be frustrating. By understanding the causes and potential solutions, users can troubleshoot and resolve the issue, ensuring that their water purifier operates efficiently and effectively.